JP5999685B2 - Architectural gasket and manufacturing method of architectural gasket - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a building gasket and a method for manufacturing a building gasket, and more specifically, a building gasket capable of adjusting a height as desired according to a gap amount between a plate-like member and a frame at a construction site, and It relates to the manufacturing method.

  In a building, for example, as a method of holding or sealingly holding a plate member such as a glass plate, a partition plate, and a building exterior plate (also referred to as a PC panel), the two main surfaces of the plate member are sandwiched. A method of arranging or press-fitting a gasket between the frame and the plate-like member is employed. Specifically, a building gasket (also referred to as a front-end gasket) is usually mounted in a holding groove of a frame body that holds the plate-like member, and then the plate-like member is fitted into the holding groove and finally fitted into the plate. By pressing a building gasket (also referred to as a retrofit gasket) between the holding member and the holding groove, the plate-like member is held or closely held using the building gasket. Examples of the member in which such a plate-like member is held include, for example, a sash, a door, a window, and the like in which a glass plate or a glass panel is sandwiched and held between both main surfaces by a building gasket. An architectural gasket for holding such a plate-like member is usually a long fixed sealing material, and for example, a glazing gasket, an airtight gasket, or a structural gasket is known.

  As such a construction gasket, for example, Patent Document 1 discloses that “a mounting portion 2 for a support is provided on one side and a contact surface 3 for a face material is provided on the other side. The base portion 1 and a sealing portion 4 made of a soft elastic material having a pressure sealing surface 5 against the face material adjacent to the abutting surface 3, and the base portion 1 and the sealing portion 4 are made of each elastic material. A glazing gasket characterized in that it is integrally bonded by coextrusion and can be peeled off at its bonding interface 6 ”.

  Since it is important for the architectural gasket used in this way to hold or tightly hold the frame and the plate-like member, the dimensions and shape of the frame and plate-like member and the dimensions of the architectural gasket are usually used. In addition, it is often necessary to newly manufacture at least one of a frame, a plate-shaped member, and a building gasket each time so that the shape, shape, and the like match, and the versatility of the building gasket is inferior. It was.

  Moreover, even when holding a plate-like member having a predetermined dimension, if there is a dimensional error in the plate thickness of the plate-like member or the interval between the holding grooves, the architectural product manufactured to fit this plate-like member is used. Even with gaskets, there is more play than necessary between the plate-like members, or the necessary amount of gap is not secured between the plate-like members and the frame body, and the plate-like members are held or closely held as desired. There was something I couldn't do.

  As a gasket capable of coping with such a problem, Patent Document 2 describes generally “a gasket provided with a peelable soft resin layer”. Patent Document 2 states that “if the glass plate fitted into the glass groove 2 is thick, the soft resin layer 14a can be cut off” (column 0010). “When the glass plate is thick, the soft resin layer 14 is cut to assist. The piece 5 is fitted between the glass surface and the groove edge 13 "(column 0011), and the soft resin layer 14a or 14 is cut or cut to cope with the variation in the thickness of the glass plate. It has been pointed out.

  However, in the gasket of Patent Document 2, in order to cope with the thickness of the glass, it is necessary to cut or tear the soft resin layer 14a or 14, and the plurality of soft resin layers 14a or 14 are soft resin layers 14a or 14 Since they are joined to each other by rib-like support strips protruding from the flexible resin layer 14a or 14, it is not easy to cut or tear the soft resin layer 14 or at the site, so that it is not required to be uniform and flat in the longitudinal direction of the gasket The soft resin layer 14a or 14 and the rib-like support strip can hardly be cut or torn. For example, when the soft resin layer 14a or 14 is manually cut or torn at the site, the cut surface or the split cut surface does not become flat. In some cases, the necessary soft resin layer 14a or 14 together with the unnecessary soft resin layer 14a or 14 is not required. May have been cut or torn. Further, if a cutter or the like is used, the soft resin layer 14a or 14 and the support strip can be cut or torn evenly and flatly by hand, but the unnecessary soft resin layer can still be sufficiently adhered and held. It is often not easy to cut or tear 14a or 14 and the support strip.

Japanese Utility Model Publication 3-54544 Japanese Patent Laid-Open No. 9-151675

  It is an object of the present invention to provide an architectural gasket capable of adjusting the height as desired according to the amount of gap between the plate-like member and the frame at a construction site, and a method for manufacturing the same.

The first means for solving the above-mentioned problem is
Claim 1 has a base, a support wall, a thin wall portion, and a height adjustment portion having at least a first adjustment plate and a second adjustment plate,
The base material, the supporting wall, the thin wall portion, and the height adjusting portion are fire-resistant and flame-retardant silicone rubber compositions having the following composition:
The substrate have at least two support walls projecting in the same direction from the surface,
Both the at least two support walls, said support walls disposed respectively near the tip, and has a thin portion having the support wall thickness less than,
The height adjusting portion is located at a position close to the thin wall portion side , and is integrated with each of tip ends of the two support walls via the thin wall portion , and the first adjusting plate An architectural gasket comprising at least a second adjustment plate having a central portion that is not joined to an end portion of the first adjustment plate and a central portion of the first adjustment plate that are joined to the end portion of the first adjustment plate by pressure vulcanization. Yes,
composition
(A) The average unit formula RaSiO _{(4-a) / 2} (R is an unsubstituted or substituted same or different monovalent hydrocarbon group, a is an average number of 1.9 to 2.1) 100 parts by mass of siloxane
(B) 10 to 100 parts by mass of silica powder
(C) Mica 50-100 parts by mass
(D) Crystallite 10-50 mass parts
(E) Aluminum hydroxide 1-80 parts by mass
(F) 6-80 parts by mass of magnesium hydroxide
(G) Platinum or a platinum compound containing the same amount of platinum in terms of platinum is 5 to 500 ppm based on (a) the organopolysiloxane.
Claim 2 is the architectural gasket according to claim 1, wherein the thin wall portion has a groove or a recess on a side surface of the support wall facing the other support wall.
3. The building gasket according to claim 1, wherein the thin portion has a groove or a recess on a side surface of the support wall that does not face the other support wall. Yes,
A fourth aspect of the present invention is the architectural gasket according to the second or third aspect, wherein the groove has a narrower width along the depth direction.
According to a fifth aspect of the present invention, the height adjusting unit is arranged in a stacked manner on the first adjusting plate via a protruding rib in which at least one second adjusting plate is arranged on the surface on the first adjusting plate side. It is a building gasket according to any one of claims 1 to 4,
Claim 6 is a pair of building gaskets for holding the plate-like member so as to sandwich both main surfaces of the plate-like member, and as a main surface holding gasket for holding one main surface of the plate-like member. It is a pair of building gasket characterized by having the building gasket as described in any one of -5, and the other main surface holding gasket which hold | maintains the other main surface of the said plate-shaped member.

The second means for solving the above-mentioned problem is
Claim 7 is a method of manufacturing the building gasket according to any one of claims 1 to 6 ,
A die in which the base, the thin portion, and the first adjustment plate are integrally formed, and a first cavity having a narrow cavity for forming the thin portion thinner than the support wall is disposed near the tip of the support wall. Extruding the rubber composition to extrude the molded body,
Vulcanizing the molded body, and a method for manufacturing a building gasket,
According to an eighth aspect of the present invention, the die has an out die and an in-die disposed in the out die, and at least one of the out die and the in-die has a protrusion that forms the narrow cavity. It is a manufacturing method of the architectural gasket according to claim 7 ,
According to a ninth aspect of the present invention, the die has a second cavity for molding the second adjustment plate,
At the same time as or before the vulcanizing step, the method includes a step of pressure-bonding the plate-shaped molded body molded in the second cavity onto the first adjustment plate of the molded body molded in the first cavity. The manufacturing method of a building gasket according to claim 7 or 8 .

  A building gasket according to the present invention includes a base, a thin portion, and a height adjusting portion having n (n is an integer of 1 or more) adjusting plates, and is a first adjusting plate disposed close to the thin portion. Since the height adjustment part and each of the support walls are joined via the thin wall part, when the height adjustment part is pulled away from the support wall, the thin part where the separating stress is concentrated breaks preferentially and the height adjustment part Is easily peeled off from the support wall.

  The manufacturing method of a building gasket according to the present invention includes a step of extruding a rubber composition by extruding a rubber composition into a die in which a first cavity including a narrow cavity in which a thin portion is formed thinner than a support wall. Since it has, the architectural gasket which concerns on this invention to which the height adjustment part is joined via the thin part can be manufactured suitably.

  As described above, according to the present invention, it is possible to provide a building gasket and a method for manufacturing the same that can adjust the height as desired in accordance with the gap amount between the plate-like member and the frame at the construction site.

FIG. 1 is a schematic front view showing an example of a building gasket according to the present invention. FIG. 2 is a schematic front view showing a modified example of the building gasket according to the present invention. FIG. 3 is a schematic explanatory view for explaining a method and a state in which a plate-like member is held tightly using a pair of building gaskets in which an example of a building gasket according to the present invention is a leading gasket. FIG. 4 is a schematic front view showing an example of a die used in the method for manufacturing a building gasket according to the present invention.

  The building gasket according to the present invention is usually formed into an elongated shape, and is continuously formed along the holding groove in a gap formed between the plate-like member and the holding groove of the frame body. The plate-shaped member is held or held in close contact with each other. The architectural gasket according to the present invention is suitably used for holding or sealingly holding a plate-like member on a frame, and in particular, in a pair of building gaskets holding both main surfaces of the plate-like member in a pressure-like manner. It is suitably used as a leading gasket whose height is adjusted according to the gap between the member and the frame. The usage method and usage state will be described later.

  The plate-like member (also referred to as a face material) that is held or closely held by the building gasket according to the present invention may be a member that is incorporated in or fitted into a flat frame-like shape. Examples thereof include a glass plate, a glass panel, a resin plate, a resin panel, a partition plate, and an architectural exterior plate. Moreover, as a frame, what has a space which incorporates or fits a plate-shaped member and can support a plate-shaped member may be sufficient. Examples of the frame body in which the plate-like member is held or closely held by the building gasket according to the present invention include a glass window, a sash, a door, and a sliding door.

  A building gasket according to the present invention includes a base body having at least two support walls projecting in the same direction from the surface, and a thin-walled portion disposed in the vicinity of the tip of each support wall and having a thickness thinner than the support wall. And a height adjustment unit having n adjustment plates (n is an integer equal to or greater than 1), and the height adjustment unit is a first adjustment plate disposed close to the thin portion of the adjustment plate constituting the height adjustment unit. It is joined to each support wall via the thin part. That is, this height adjustment part is supported by the support wall and the thin part, is spanned between at least two thin parts, and the height adjustment part is not peeled off when it is mounted in the holding groove of the frame. The height adjusting portion from which at least one adjusting plate has been peeled off or the substrate from which the height adjusting portion has been peeled presses against one main surface of the plate-like member to hold or hold the plate-like member closely.

  Hereinafter, an architectural gasket according to the present invention will be described with an example.

  An architectural gasket 1A which is an example of an architectural gasket according to the present invention is an architectural gasket provided with a height adjusting portion 4A having two adjustment plates, that is, a first adjustment plate 26 and a second adjustment plate 27. It is molded into a long shape. As shown in FIG. 1, the construction gasket 1A includes a base 2, a thin portion 3A, a height adjusting portion 4A, and a mounting portion 5, and includes a base 2, a thin portion. An internal space 15 extending in the longitudinal direction is surrounded by 3A and the height adjusting portion 4A. FIG. 1 (a) is a schematic front view showing a building gasket 1A, and FIG. 1 (b) is a schematic enlarged view showing the vicinity of one thin portion 3A. In the building gasket 1A, as will be described later, the support walls 12a and 12b, the thin portion 3A, and the first adjustment plate 26 are integrally formed, so that the boundary between them can be easily understood as shown in FIG. It is indicated by a one-dot chain line.

  As shown in FIG. 1, the base body 2 includes a plate-like bottom portion 11 extending in the longitudinal direction of the building gasket 1 </ b> A and a width direction perpendicular to the longitudinal direction, and the bottom portion 11 from both end edges in the width direction of the bottom portion 11. Two support walls 12a and 12b projecting perpendicularly from the surface in the same direction with respect to the surface are provided, and the cross section perpendicular to the longitudinal direction is flat and substantially U-shaped. The two support walls 12a and 12b are formed in the same manner, and support the height adjusting unit 4A described later in cooperation. The dimensions of the bottom 11 and the support walls 12a and 12b are appropriately set according to the plate-like member to be held, the groove of the frame, and the like.

  The thin-walled portion 3A is disposed integrally with the support walls 12a and 12b at the tip ends of the support walls 12a and 12b. Therefore, it can also be said that each of the support walls 12a and 12b has a thin portion 3A at the tip. The thin-walled portion 3A disposed on the support wall 12a has a V-shaped groove 21 opened on the first side surface 13 facing the other support wall 12b in the support wall 12a, and the thin-walled portion 3A disposed on the support wall 12b. Has a V-shaped groove 21 opening in the first side surface 13 of the support wall 12b facing the other support wall 12a. The grooves 21 are notches formed between the first adjustment plate 26 and the support walls 12a and 12b, respectively, and have a substantially V shape together with the first adjustment plate 26. The same thin wall portion 3A is arranged on the support walls 12a and 12b so that the openings of the grooves 21 face each other. Therefore, the V-shaped groove 21 can be referred to as an inner V-groove 21 that opens on the inner surface 13 of the support walls 12a and 12b. The groove 21 has a narrow width along the thickness direction of the support walls 12a and 12b, that is, the depth direction of the groove 21, that is, the distance from the first adjusting plate 26 is small. It is formed up to approximately the center of the thickness of 12b. Thus, the thin portion 3A has the groove 21 opened in the first side surface 13, the thickness along the width direction of the base 2 is thinner than the thickness of the support walls 12a and 12b, and a height adjusting portion 4A described later. It is getting thinner gradually. Therefore, when the support walls 12a and 12b and the thin wall portion 3A are viewed as a unit, each of the support walls 12a and 12b has a tapered tip portion having a tapered surface extending from the first side surface 13 side toward the opposite side surface, that is, It has a thin portion 3A.

  The height adjustment unit 4 </ b> A has two adjustment plates, a first adjustment plate 26 and a second adjustment plate 27. In the height adjusting portion 4A, the first adjusting plate 26 is arranged on the thin portion 3A side, and one second adjusting plate 27 is laminated on the surface thereof. Three protruding ribs 28 extending in the longitudinal direction at equal intervals in the width direction are arranged on the surface of the second adjusting plate 27 on the first adjusting plate 26 side, and the second adjusting plate 27 includes these protruding ribs. 28 is laminated on the first adjustment plate 26 via 28. At this time, as will be described later, the first adjustment plate 26 and the second adjustment plate 27 are joined at both end edges in the width direction, and other than both end edges are not joined due to the presence of the protruding ribs 28, or a relatively weak joining force. It is joined with. When the two adjustment plates 26 and 27 are laminated in this way, the two adjustment plates 26 and 27 are joined to each other only at both end edges thereof, so the second adjustment plate 27 is replaced with the first adjustment plate. The second adjustment plate 27 can be easily and quickly separated without peeling the first adjustment plate 26 from the thin portion 3 </ b> A when being peeled off from the thin plate 26.

  The height adjusting portion 4A having the first adjusting plate 26 and the second adjusting plate 27 is joined to the thin portion 3A by the first adjusting plate 26 disposed close to the thin portion 3A side of the adjusting plates 26 and 27. In other words, the first adjusting plate 26 is joined to the support walls 12a and 12b via the thin portion 3A. At this time, the first adjustment plate 26 is preferably formed integrally with each of the support walls 12a and 12b, and the V-shaped groove 21 has the depth. The joining force, that is, the peeling force with 12a and 12b is usually stronger than the joining force, ie, the peeling force, with the first adjusting plate 26 and the second adjusting plate 27 that are pressure-cured and vulcanized at both ends. Therefore, when only the second adjustment plate 27 is peeled off as described above, the first adjustment plate 26 is not peeled off from the support walls 12a and 12b together with the second adjustment plate 27, and only the second adjustment plate 27 is removed from the first adjustment plate 27. The adjustment plate 26 can be easily and quickly peeled off. Since the height adjusting portion 4A is disposed on the pair of thin portions 3A in this way, the height adjusting portion 4A forms an internal space 15 together with the bottom portion 11 and the support walls 12a and 12b.

  The first adjustment plate 26 and the second adjustment plate 27 are set to a thickness suitable for adjusting the gap amount between the holding groove of the frame and the plate-like member, for example, set to about 0.3 to 3 mm. The In the building gasket 1A, the first adjustment plate 26 and the second adjustment plate 27 are substantially the same size as the bottom portion 11 except for the thickness.

  The mounting portion 5 is disposed on the surface of the bottom portion 11 of the base 2 opposite to the surface on which the support walls 12a and 12b are erected, and is formed in a shape and size that fits the holding groove of the frame. The mounting portion 5 in the building gasket 1A has a connecting portion 31 protruding from the opposite surface and a flange portion 32 protruding in the width direction from the tip of the connecting portion 31. As described above, since the mounting portion 5 is integrally provided on the bottom portion 11 of the base body 2, the base body 2 includes the bottom portion 11, support walls 12 a and 12 b, and the mounting portion 5. You can also.

  As shown in FIG. 2 (a), a building gasket 1B which is another example of the building gasket according to the present invention is the same as the building gasket 1A except that it includes a thin portion 3B instead of the thin portion 3A. Basically the same. The thin wall portion 3B is basically the same as the thin wall portion 3A except that the thin wall portion 3B has a V-shaped groove 22 opened in the second side surface 14 not facing the other support wall 12b or 12a in the support wall 12a or 12b. It is the same. Accordingly, the V-shaped grooves 22 are notches formed between the first adjustment plate 26 and the support walls 12a and 12b, respectively, and are substantially V-shaped together with the first adjustment plate 26. And the V-shaped groove | channel 22 is opened toward the other side of the internal space 15, ie, the outer side, so that it may not mutually oppose. Therefore, the V-shaped groove 22 can also be referred to as the outer V-groove 22. The groove 22 has a narrow width along the thickness direction of the support walls 12a and 12b, that is, the depth direction of the groove 22, that is, the distance from the first adjustment plate 26 is small. It is formed up to approximately the center of the thickness of 12b. The thin portion 3B has a groove 22 that opens to the second side surface 14, and the thickness along the width direction of the base 2 is smaller than the thickness of the support walls 12a and 12b, as in the thin portion 3A. The thickness gradually decreases toward the height adjusting portion 4A.

  As shown in FIG. 2B, an architectural gasket 1C, which is another example of the architectural gasket according to the present invention, includes a thin portion 3C instead of the thin portion 3A. And basically the same. The thin wall portion 3C has a V-shaped groove that opens on the first side surface 13 facing the other support wall 12b or 12a and the second side surface 14 not facing the other support wall 12b or 12a in the support wall 12a or 12b. This is basically the same as the thin portion 3 </ b> A except that 21 and the groove 22 are provided. Accordingly, the groove 21 and the groove 22 are notches formed between the first adjustment plate 26 and the support walls 12a and 12b, respectively, and are substantially V-shaped together with the first adjustment plate 26. Both the substantially V-shaped groove 21 and the groove 22 have a narrow width along the thickness direction of the support walls 12a and 12b, that is, the depth direction of the groove 21, that is, the distance from the first adjustment plate 26 is small. It is small and is formed up to about 1/3 of the thickness of the support walls 12a and 12b. Thus, the thin part 3C has the groove 21 and the groove 22 respectively opened in the first side face 13 and the second side face 14, respectively, and the thickness along the width direction of the base 2 is the same as the thin part 3A. It is thinner than the thickness of 12a and 12b, and is gradually thinner toward the height adjusting portion 4A described later.

  As shown in FIG. 2C, an architectural gasket 1D, which is still another example of the architectural gasket according to the present invention, is provided with a thin gasket 3D, except that the thin gasket 3D is provided. Basically the same as 1A. The thin portion 3D is basically the same as the thin portion 3A except that the cross-sectional shape perpendicular to the longitudinal direction of the base 2 is different. That is, the thin-walled portion 3D has rectangular recesses 23 that open on the first side surfaces 13 of the support walls 12a and 12b facing the other support walls 12b and 12a, respectively. The recesses 23 are notches formed between the first adjustment plate 26 and the support walls 12a and 12b, respectively, and are formed into rectangular cutouts together with the first adjustment plate 26. And the recessed part 23 is arrange | positioned at the 1st side surface 13 so that the opening may mutually oppose, and the recessed part 23 can also be called the inner side recessed part 23 opened to the inner surface of support wall 12a and 12b. The recess 23 is approximately half the depth of the support walls 12a and 12b and has a substantially constant depth in the height direction of the support walls 12a and 12b. Thus, the thin part 3D has the recessed part 23 opened to the 1st side surface 13, the thickness along the width direction of the base | substrate 2 is thinner than the thickness of the support walls 12a and 12b, and the height adjustment part 4A mentioned later It is getting thinner gradually.

  As shown in FIG. 2 (d), a building gasket 1E, which is another example of the building gasket according to the present invention, includes a height adjusting portion 4B instead of the height adjusting portion 4A. This is basically the same as the construction gasket 1C. This height adjustment portion 4B is height adjustment except that it has a groove 29 extending in the longitudinal direction at both edges in the width direction, that is, at each joint portion between the first adjustment plate 26 and the second adjustment plate 27. The part 4A is basically the same. The groove 29 contributes to reducing the bonding area of the bonding portion and separating the second adjustment plate 27 from the first adjustment plate 26 more easily and quickly.

  The building gasket according to the present invention is usually formed of a rubber composition or a resin composition. Such a rubber composition or resin composition is preferably excellent in weather resistance, and when it is used as a building gasket according to the present invention, it has a predetermined rubber hardness so that the plate-like member can be held tightly. It is still more preferable in terms. For example, when a glass plate or a glass panel is held tightly, the rubber hardness of the building gasket is preferably JIS A30-80. This rubber hardness is a value measured according to the method described in JIS K6253 (1997). Examples of the rubber composition in which the cured product exhibits weather resistance and rubber hardness in the above range include rubber compositions containing synthetic rubber such as silicone rubber and urethane rubber.

In addition, since the architectural gasket according to the present invention is used for construction, it preferably has fire and flame resistance, and in the case of manufacturing such a fire and flame retardant architectural gasket, It is preferably formed from a composition. Examples of such a fire-resistant and flame-retardant rubber composition include a fire-resistant and flame-retardant silicone rubber composition having the following composition.
(A) The average unit formula RaSiO _{(4-a) / 2} (R is an unsubstituted or substituted same or different monovalent hydrocarbon group, a is an average number of 1.9 to 2.1) Siloxane 100 parts by mass (b) Silica powder 10-100 parts by mass (c) Mica 50-100 parts by mass (d) Crystallite 10-50 parts by mass (e) Aluminum hydroxide 1-80 parts by mass (f) Magnesium hydroxide 6 to 80 parts by mass (g) Platinum or a platinum compound containing the same amount of platinum in terms of platinum is 5 to 500 ppm with respect to (a).

Organopolysiloxane (a) is represented by the average unit formula RaSiO _{(4-a) / 2,} where a is the average number of 1.9 to 2.1, R is methyl, ethyl, propyl, butyl Group, pentyl group, hexyl group, heptyl group and other alkyl groups; cyclohexyl group and other cycloalkyl groups; phenyl group and tolyl group and other aryl groups; vinyl group and allyl group and other alkenyl groups; and carbon atoms of these groups A part or all of the bonded hydrogen atoms is a group substituted with an organic group containing a halogen atom, amino group, cyano group, epoxy group, carboxyl group, etc., and the same or different unsubstituted or substituted monovalent carbonization An organopolysiloxane which is a hydrogen group, preferably 80 mol% or more of which is a methyl group and 0.1 to 0.5 mol% of a vinyl group, and has a viscosity at 25 ° C of 1,000 cSt. Above, preferably 10,000 cSt or more. In addition, the end of the (a) organopolysiloxane is preferably blocked with a silanol group, a methyl group, a vinyl group, or the like, and more preferably with a vinyl group.

  As the silica powder (b), commercially available products such as fumed silica, hydrophobic silica, wet silica, quartz powder, clay and the like can be used, and are contained for the purpose of reinforcing and increasing the amount of silicone rubber. The particle size of the silica powder (b) is preferably 50 μm or less because it is necessary to uniformly disperse in the (a) organopolysiloxane. This addition amount is preferably 10 to 100 parts by mass with respect to 100 parts by mass of (a) organopolysiloxane. If the addition amount is less than 10 parts by mass, the reinforcing effect of the rubber is insufficient, and if it exceeds 100 parts by mass, the reinforcing effect does not change and the various properties inherent to the rubber are reduced.

  Mica (c) and crystallite (d) impart fire resistance and flame retardancy to this fire and flame retardant silicone rubber composition, and the amount of mica (c) added is (a) 100 parts by mass of organopolysiloxane. The added amount of crystallite (d) is preferably 10 to 50 parts by mass with respect to 100 parts by mass of (a) organopolysiloxane. When these addition amounts are less than 50 parts by mass and less than 10 parts by mass, respectively, they are not converted into ceramics at a high temperature, and the fire resistance becomes insufficient. Moreover, when each exceeds 100 mass parts and 50 mass parts, a fire-resistant flame-retardant silicone rubber composition will become a thing with a high viscosity. The particle size of mica is preferably 50 μm or less from the viewpoint of (a) dispersibility in organopolysiloxane and maintaining strength. On the other hand, the crystallite particle size is desirably 50 μm or less for the same reason.

  Both aluminum hydroxide (e) and magnesium hydroxide (f) release moisture at high temperatures to become aluminum oxide and magnesium oxide, but at this time, the combustion temperature is lowered by the latent heat of vaporization of water. The reason for sharing the two types is that aluminum hydroxide starts releasing water at about 180 ° C. and completes releasing at about 350 ° C. Magnesium hydroxide begins to release water from about 340 ° C and continues to release up to about 450 ° C. Therefore, by sharing both, moisture can be continuously released over a wide temperature range, and the rise in combustion temperature can be suppressed. In order to exhibit sufficient flame retardancy and fire resistance, the total amount of both added is 10 It is especially preferable that it is -80 mass parts. If the total amount of addition is less than 10 parts by mass, the effect is insufficient, and if it exceeds 80 parts by mass, the formability is inferior, hard and brittle, causing problems in practical use. The mixing ratio of the two, which enables the most efficient continuous water release by aluminum hydroxide and magnesium hydroxide and suppresses the increase in combustion temperature, is aluminum hydroxide / magnesium hydroxide = 1 / 9- 4/6. Moreover, it has the feature that the ceramicization of a combustion thing is accelerated | stimulated by adding these. Both of these can use ordinary commercial products.

  Platinum or a platinum compound (g) containing the same amount of platinum serves as a flame retardant for the silicone rubber and as a ceramic agent at a high temperature of the silicone rubber together with the added filler. In general, silicone rubber has a low degree of cross-linking, so at high temperatures, the siloxane main chain decomposes, rapidly producing volatile low-molecular cyclics and continuing to burn. In the presence of a platinum catalyst, this promotes oxidation and degradation on the surface of rubber that comes into contact with air, creates a highly cross-linked structure, and forms a siloxane film with less organic groups on the surface to form non-combustible siloxane film. The fire is not extinguished and the rubber is extinguished. In order to supplement the function of the platinum catalyst, various small amounts of auxiliary agents may be used. Examples of the component (g) include platinum metal such as platinum black, chloroplatinic acid, complex salts of chloroplatinic acid with alcohol, ether, acetaldehyde, and the like. This metal platinum is a carrier such as alumina or silica gel. The chloroplatinic acid and its complex salt may be added as an alcohol solution. The amount of platinum to be added is preferably in the range of 5 to 500 ppm with respect to (a) the organopolysiloxane, and preferably in the range of 20 to 200 ppm. If the added amount is less than 5 ppm, the original function of the catalyst is not exhibited, and if it exceeds 500 ppm, the effect of the catalyst does not change, so it is not economical to use it in excess of 500 ppm.

  The fire-resistant and flame-retardant silicone rubber composition containing these components can be easily obtained by mixing predetermined amounts of the above-described components. A silane or low molecular weight siloxane containing an alkoxy group, silanol group or the like may be blended as a dispersion aid, but the type and amount are selected according to the physical properties required depending on the use of the final rubber. In order to improve the adhesive strength between the matrix of the refractory filler and the organopolysiloxane, it may be treated with a silane coupling agent or the like. Furthermore, an inorganic pigment such as titanium white, titanium yellow, bengara, chrome green, or yellow lead may be added as a heat resistance improver or a colorant.

  This fire-resistant flame-retardant silicone rubber composition is described in, for example, Japanese Patent No. 3485387.

  The building gasket according to the present invention is used for holding or sealingly holding a plate-like member in a frame in a building. At this time, as shown in FIG. 3, the plate-like member 42 is usually fitted into a holding groove 43 a formed in the frame 43 for holding the plate-like member 42, and both main parts of the plate-like member 42 are inserted. It is arranged or mounted in the gap between each of the surfaces 42a and 42b and the holding groove 43a. FIG. 3 shows an end view of the state in which the glass plate 42 is held tightly.

  An example in which the architectural gasket according to the present invention is used for a sash will be specifically described. As shown in FIG. 3, a glass plate 42 is prepared as a sash frame 43 and a plate-like member 42. In addition, as a pair of building gaskets for holding the glass plate 42, a front gasket 1A and a post gasket 41 are prepared. The leading gasket 1A is a gasket that holds one main surface 42a of the glass plate 42, and the architectural gasket 1A is employed. The retrofit gasket 41 is a gasket that holds the other main surface 42b of the glass plate 42, and the architectural gasket 1A can be used. In this example, another gasket is used. As shown in FIG. 3, the basic shape of this gasket is basically the same as that of the construction gasket 1A. However, since it is not necessary to adjust its height, it is not provided with a height adjusting portion and is entirely inside. It is a substance.

  In order to hold the glass plate 42 on the frame body 43, first, the thickness of the glass plate 42, the width of the holding groove 43 a of the frame body 43, the height of the building gasket 1 </ b> A as a leading gasket, and the height of the retrofit gasket 41. Accordingly, the amount for adjusting the height of the building gasket 1A, that is, the number of adjusting plates 26 and 27 to be peeled off is determined. When the height to be adjusted is determined, the height adjusting portion 4A or the second adjusting plate 27 of the building gasket 1A is peeled from the building gasket 1A according to the height.

  For example, when peeling the whole height adjustment part 4A, that is, the first adjustment plate 26, the first adjustment plate 26 together with the height adjustment part 4A and the normal second adjustment plate 27 from one end surface in the longitudinal direction of the building gasket 1A. Is gripped and pulled away from the support walls 12a and 12b. Then, since the building gasket 1A is configured as described above, the second adjustment plate 27 that is preferentially concentrated on the thin portion 3A when the height adjustment portion 4A is separated is preferentially concentrated on the thin portion 3A. The thin portion 3A is selectively broken without peeling from the first adjustment plate 26. In this way, the height adjusting portion 3A is sequentially peeled from the one end surface to the other end surface along the longitudinal direction.

  On the other hand, when the second adjusting plate 27 is peeled off, only the second adjusting plate 27 to be peeled from one end surface in the longitudinal direction of the building gasket 1A is gripped and pulled away from the first adjusting plate 26. Then, in the architectural gasket 1A configured as described above, as described above, the first adjustment plate 26 is formed integrally with the thin portion 3A, and the bonding force between the support walls 12a and 12b is strong. In addition, since the separation stress of the second adjustment plate 27 is preferentially concentrated on the pressure-curing vulcanized portion between the first adjustment plate 26 and the second adjustment plate 27, the thin portion 3A is broken and the first adjustment plate 26 is Without peeling, both end edges of the second adjustment plate 27 subjected to pressure vulcanization with relatively weak bonding force are selectively broken. In this way, the second adjustment plate 27 is sequentially peeled from the cut end surface to the other cut end surface along the longitudinal direction.

  In the construction gasket 1A, the height adjustment portion 3A or the second adjustment plate 27 can be easily removed from the construction gasket 1A at the construction site without using a cutting tool such as a cutter or manually. And it can be made to peel rapidly. In the building gasket 1A, since the first adjustment plate 26 and the second adjustment plate 27 are joined at both end edges, the surface of the first adjustment plate 26 after the second adjustment plate 27 is peeled becomes flat. . Moreover, since the building gasket 1A has the height adjustment part 3A joined to the support walls 12a and 12b through the thin part 3A, the support walls 12a and 12b after the height adjustment part 3A is peeled off. The tip of each of them is substantially flat, that is, the heights of the support walls 12a and 12b are substantially constant.

  As shown in FIG. 3, the building gasket 1 </ b> A whose height is adjusted in this way is fitted with the mounting portion 5 in the first mounted portion 43 b formed substantially parallel to the holding groove 43 a of the frame 43. It is mounted so as to go around the holding groove 43a. FIG. 3 shows the building gasket 1A from which the second adjustment plate 27 has been peeled off.

  Next, the glass plate 42 is fitted into the holding groove 43a, and one main surface 42a thereof is brought into pressure contact with the building gasket 1A. At this time, when the entire height adjusting portion 4A is peeled off, the thin portion 3A of the building gasket 1A becomes a pressure contact portion that presses against the glass plate 42, and when the second adjusting plate 27 is peeled off, the building gasket 1A is peeled off. The height adjusting portion 4 </ b> A consisting only of the first adjusting plate 26 serves as a press contact portion that presses the glass plate 42.

  After the building gasket 1A and the glass plate 42 are brought into close contact with each other in this way, as shown in FIG. 3, the retrofit gasket 41 is fitted between the glass plate 42 and the holding groove 43a so that the retrofit gasket 41 is framed. The second mounting portion 43c formed substantially parallel to the holding groove 43a of the body 43 is mounted basically in the same manner as the building gasket 1A. In this way, the retrofit gasket 41 is mounted so as to go around the holding groove 43a. At this time, since the height of the building gasket 1A attached as the leading gasket has already been adjusted, the retrofitting gasket 41 can be easily attached, that is, press-fitted into the frame body 43, and the one main surface 42a of the glass plate 42 is provided. It is possible to secure the adhesiveness between the first and second building gaskets 1 </ b> A and the other main surface 42 b of the lath plate 42 and the retrofit gasket 41. In addition, although the example which utilized 1 A of building gaskets for a sash as an example of the building gasket which concerns on this invention was demonstrated, either of the building gaskets 1B-1E which are other examples of the building gasket which concerns on this invention Even if it is used or used for glass windows, doors and sliding doors other than sashes, the same effect can be obtained.

  The manufacturing method of a building gasket according to the present invention includes a step of extruding a rubber composition into a die and extruding the formed body, and a step of vulcanizing the formed body. The die used in the method for manufacturing a building gasket according to the present invention integrally forms the base, the thin portion, and the first adjustment plate in the building gasket according to the present invention, and forms the thin portion thinner than the support wall. A die in which a first cavity having a narrow cavity is arranged. When such a die is used, the support wall, the thin portion, and the first adjustment plate can be integrally formed, and the building gasket according to the present invention can be easily and suitably manufactured.

  As shown in FIG. 4, a suitable die used in the method for manufacturing a building gasket according to the present invention includes an out die 52 and an in die 53 disposed in the out die 52. Used for manufacturing. The out die 52 is a second cavity 56 capable of forming the first through hole 61 and the second adjustment plate 27 corresponding to the contours of the base 2, the thin portion 3 </ b> A, the first adjustment plate 26 and the mounting portion 5 of the building gasket 1 </ b> A. And the second through-hole 62. Since the shape of the first through hole 61 corresponds to the outline of the building gasket 1A as described above, the description thereof is omitted. The second through hole 62 is a slit-like through hole in which the second adjustment plate 27 having the protruding rib 28 can be formed. The indies 53 arranged inside the first through holes 61 have external shapes corresponding to the internal space 15 and the thin portion 3A of the building gasket 1A. Specifically, the main body 66 and the main body are substantially rectangular in front view. 66, and a protrusion 67 having a reverse trapezoidal shape in front view connected to one long end edge.

  When the in-die 53 is disposed in the first through-hole 61, as shown in FIG. 4, a first cavity 54 is formed between the out-die 52 and the in-die 53. A narrow cavity 55 for forming the thin wall portion 3A of the building gasket 1A thinner than the support walls 12a and 12b by the protruding portion 67 protruding toward the inner surface of the die 52 corresponds to the thin wall portion 3A of the building gasket 1A. Formed.

  In the construction gasket manufacturing method according to the present invention, a step of extruding a rubber composition to the die 51 using an extruder is performed. As long as the extruder used in this step can extrude the rubber composition to the die 51, its structure, for example, the number of screws, the extrusion direction (straight or cross), etc. is not particularly limited, and a known extruder can be used. it can. Therefore, the extruder may be a vertical extruder or a horizontal extruder.

  The rubber composition is as described above and is not particularly limited. However, when the fireproof flame resistance is required for the building gasket, it is preferable to use the fireproof flame retardant silicone rubber composition.

  In the extrusion molding step, appropriate conditions under which the rubber composition can be extruded can be adopted depending on the rubber composition to be used, and the extrusion molding conditions and method are not particularly limited.

  In the manufacturing method of the building gasket according to the present invention using the die 51, the integrally formed body and the second adjustment forming the base 2, the thin portion 3, the first adjusting plate 26 and the mounting portion 5 in the extrusion molding step. A plate-like formed body for forming the plate 27 is formed. Therefore, when the die 51 is used, a step of pressure-bonding the plate-shaped molded body via the protruding rib 28 to the first adjusting plate 26 of the integrally molded body is performed before or simultaneously with vulcanization of the integrally molded body. it can. This step of crimping can be performed, for example, by a roller crimping method in which the support walls 12a and 12b of the integrally molded body and the plate-shaped molded body are passed between a pair of rollers. When the plate-shaped molded body is pressure-bonded to the integrally molded body in this manner, the pressure-bonded molded body shown in FIG. 1 is obtained.

  In the method for manufacturing a building gasket according to the present invention, a step of vulcanizing the molded body thus formed, for example, a pressure-bonded molded body, is performed. The temperature and time for vulcanizing the rubber composition are selected according to the rubber composition to be used, and the rubber composition is usually heated for a predetermined time in a heating furnace or the like. When the pressure-bonded molded body is heated and vulcanized in this manner, both the edges of the first adjustment plate 26 and the second adjustment plate 27 are hot-bonded due to the presence of the protruding ribs 28, so that the two adjustment plates 26 and 27 are formed. A height adjusting portion 4A having the above is formed.

  In the manufacturing method of a building gasket using the die 51 according to the present invention, since the integrally molded body and the plate-shaped molded body are coextruded and hot-bonded, the thin portion 3A and the first The manufactured building gasket 1 </ b> A is manufactured in which the adjustment plate 26 is integrally formed with a higher strength than the joint between the two adjustment plates 26 and 27. Thus, the manufacturing method of the building gasket according to the present invention using the die 51 having the second cavity 56 can suitably manufacture the building gasket 1 </ b> A including the height adjusting portion 4 </ b> A having the second adjusting plate 27. Therefore, as described above, the building gasket 1A can be easily and as desired to adjust the height adjusting portion or the second adjusting plate according to the gap amount between the plate-like member and the frame body at the construction site, even if it is manual. It can be quickly peeled off and its height can be adjusted as desired.

  In the method for manufacturing a building gasket according to the present invention, if desired, the long body can be cut into the building gasket according to the present invention.

  The architectural gasket according to the present invention is not limited to the above-described embodiment, and various modifications can be made within a range in which the object of the present invention can be achieved.

  For example, each of the building gaskets 1A to 1E includes the height adjusting portion 4A or 4B in which two adjusting plates 26 and 27 are laminated. In the present invention, the height adjusting portion is a single sheet. Only the adjustment plate, that is, the first adjustment plate may be provided, or three or more adjustment plates, that is, two or more second adjustment plates may be provided. In other words, the height adjustment unit may be arranged in a stacked manner on the first adjustment plate via protruding ribs in which two or more second adjustment plates are arranged on the surface on the first adjustment plate side. And the construction gasket provided with the height adjustment part which has such a 2nd or more 2nd adjustment plate, when the 2nd adjustment plate which should be peeled is pulled apart, a peeling stress is this 2nd adjustment. The first adjustment plate and the other second adjustment plate are selectively concentrated between the plate and the other second adjustment plate arranged on the substrate side, and the first adjustment plate and the other second adjustment plate are not peeled off. 2 The adjustment plate is peeled off preferentially. Note that the two or more second adjustment plates in the height adjustment unit may be basically formed in the same manner or different from each other. As described above, the architectural gasket 1A which is an example of the architectural gasket according to the present invention includes the height adjusting portion having one first adjusting plate and one second adjusting plate. The building gasket may include a height adjustment unit in which at least one second adjustment plate is stacked on one first adjustment plate.

  In addition, each of the architectural gaskets 1A to 1E has two support walls 12a and 12b erected on the edge, but in this invention, the architectural gasket has three or more support walls. The position where the support wall is erected is not limited to the edge.

  Architectural gaskets 1A, 1B and 1D comprise the same thin part 3A having one groove 21 or 22 or recess 23, and architectural gaskets 1C and 1E are identical thin parts having two grooves 21 and 22 Although 3C is provided, in this invention, the thin part may have a 3 or more groove | channel or recessed part, and the thin part arrange | positioned at at least 2 support wall may be the same, or may differ.

  In the building gaskets 1 </ b> A to 1 </ b> E, the V-shaped groove 21, the groove 22, or the recess 23 is continuously formed along the longitudinal direction of the base 2, that is, the extending direction. In addition, the recess is not limited to a rectangular shape and can be set to an appropriate cross-sectional shape, and the groove or the recess may be formed discontinuously along the longitudinal direction of the substrate. For example, the thin portion may have a slit formed only by cutting instead of or in addition to the V-shaped groove.

  Although the building gaskets 1A to 1E each include the mounting portion 5, in this invention, the building gasket may not include the mounting portion.

  The method for manufacturing a building gasket according to the present invention is not limited to the above-described embodiment, and various modifications can be made within a range in which the object of the present invention can be achieved.

  For example, in the die 51, the protrusion 67 is formed on the in-die 53 in order to manufacture the building gasket 1A, but when the building gasket 1B is manufactured, the protrusion is formed on the out-die, and the building gasket 1C. And when manufacturing 1E, a protrusion part is formed in both an out die and an in-die, and when manufacturing architectural gasket 1D, a protrusion part is formed in an in-die.

  The out die 52 has one second cavity 56. In the present invention, the out die 52 includes a height adjusting portion having two or more second adjusting plates on the first adjusting plate. In the case of manufacturing a gasket, the out die preferably has two or more second cavities.

1A, 1B, 1C, 1D, 1E Architectural gasket 2 Base 3A, 3B, 3C, 3D Thin portion 4A, 4B Height adjustment portion 5 Mounting portion 11 Bottom portion 12a, 12b Support wall 13 First side surface (inner side surface)
14 Second side surface 15 Internal space 21 V-shaped groove (inner V-groove)
22 V-shaped groove (outer V-groove)
23 Rectangular recess (inner recess)
26 first adjusting plate 27 second adjusting plate 28 protruding rib 29 groove 31 connecting portion 32 flange 41 retrofit gasket 42 plate member (glass plate)
42a one main surface 42b other main surface 43 frame 43a holding groove 43b first mounted portion 43c second mounted portion 51 dice 52 out die 53 in die 54 first cavity 55 narrow cavity 56 second cavity 61 first through hole 62 Second through hole 66 Main body 67 Projection

Claims (9)

A base, a support wall, a thin portion, and a height adjustment portion having at least a first adjustment plate and a second adjustment plate;
The base material, the supporting wall, the thin wall portion, and the height adjusting portion are fire-resistant and flame-retardant silicone rubber compositions having the following composition:
The substrate have at least two support walls projecting in the same direction from the surface,
Both the at least two support walls, said support walls disposed respectively near the tip, and has a thin portion having the support wall thickness less than,
The height adjusting portion is located at a position close to the thin wall portion side , and is integrated with each of tip ends of the two support walls via the thin wall portion , and the first adjusting plate An architectural gasket comprising at least a second adjustment plate having a central portion that is not joined to an end portion of the first adjustment plate and a central portion of the first adjustment plate .
composition
(A) The average unit formula RaSiO _{(4-a) / 2} (R is an unsubstituted or substituted same or different monovalent hydrocarbon group, a is an average number of 1.9 to 2.1) 100 parts by mass of siloxane
(B) 10 to 100 parts by mass of silica powder
(C) Mica 50-100 parts by mass
(D) Crystallite 10-50 mass parts
(E) Aluminum hydroxide 1-80 parts by mass
(F) 6-80 parts by mass of magnesium hydroxide
(G) Platinum or a platinum compound containing the same amount of platinum in terms of platinum is 5 to 500 ppm based on (a) the organopolysiloxane.   2. The architectural gasket according to claim 1, wherein the thin portion has a groove or a recess on a side surface of the support wall facing the other support wall.   The architectural gasket according to claim 1, wherein the thin portion has a groove or a recess on a side surface of the support wall that does not face the other support wall.   4. The architectural gasket according to claim 2, wherein the groove has a width that decreases along the depth direction.   The height adjusting unit is characterized in that at least one second adjusting plate is laminated on the first adjusting plate via protruding ribs arranged on the surface on the first adjusting plate side. The architectural gasket according to any one of claims 1 to 4. A pair of building gaskets for holding a plate-like member so as to sandwich both main surfaces of the plate-like member, and as a main surface holding gasket for holding one main surface of the plate-like member. A pair of building gaskets, comprising the building gasket according to claim 1 and another main surface holding gasket for holding the other main surface of the plate-like member. A method for manufacturing the architectural gasket according to any one of claims 1 to 6 ,
A die in which the base, the thin portion, and the first adjustment plate are integrally formed, and a first cavity having a narrow cavity for forming the thin portion thinner than the support wall is disposed near the tip of the support wall. Extruding the rubber composition to extrude the molded body,
And a step of vulcanizing the molded body. The die has an out die and an in-die disposed in the out die, and at least one of the out die and the in-die has a protrusion that forms the narrow cavity. 8. A method for producing a building gasket according to 7 . The die has a second cavity for molding the second adjustment plate,
At the same time as or before the vulcanizing step, the method includes a step of pressure-bonding the plate-shaped molded body molded in the second cavity onto the first adjustment plate of the molded body molded in the first cavity. The manufacturing method of the architectural gasket of Claim 7 or 8 .

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