JP2010151245A - Sealing member for piping, and its production method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing member for piping capable of being used for pipes having different outer diameters, and its production method. <P>SOLUTION: The sealing member for piping is of plate-like shape surrounding a first through-hole 14 through which a pipe P can pass and includes a base part 12 fixed to an architectural plate member M and a plate-like seal part 20 having a shape for surrounding a second through-hole 22 with a smaller diameter than that of the first through-hole 14 and an overlap part 24 overlapped integrally with the peripheral part 16 of the first through-hole 14 in the base part 12 while the second through-hole 22 is located inside the first through-hole 14. The seal part 20 is comprised of a softer material than the base part 12. The overlap part 24 and the part 16 in the base part 12 on which the overlap part 24 is overlapped have close contact surfaces 24a and 16a closely contacting with each other, respectively. These close contact surfaces 24a and 16a include a concave and convex fitted with each other and are jointed by the concave and convex fitted with each other. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pipe sealing member for sealing a gap between a pipe passing through a building surface material such as a wall of a house, a structural plywood or a floor, and the building surface material penetrated by the pipe.

Conventionally, the thing of patent document 1 is known as a sealing member for piping. As shown in FIGS. 10A and 10B, the pipe sealing member includes a plate-like base portion 104 surrounding the through-hole 102, and the through-hole 102 from the through-hole peripheral portion of the base portion 104. And a cylindrical portion 106 erected so as to surround. The piping sealing member 100 allows a pipe penetrating the building surface material to be inserted into the through hole 102 and brings the base portion 104 into close contact with the building surface material around the piping. At this time, when the diameter (inner diameter) of the through hole 102 of the piping sealing member 100 is the same as or slightly smaller than the outer diameter of the pipe, the outer peripheral surface of the pipe and the inner surface of the cylindrical portion 106 are in close contact with each other. It is possible to seal a gap between the pipe penetrating the building surface material and the surrounding building surface material.
JP-A-8-61508

  In the pipe sealing member 100, the peripheral part of the through hole of the cylinder part 106 and the base part 104 is hardly stretchable, and in order to seal the gap between the pipe and the building surface material through which the pipe passes, It is necessary to use a pipe sealing member 100 having a through hole 102 (hereinafter also simply referred to as “inner diameter”) having an inner diameter that matches the outer diameter of the pipe penetrating the surface material.

  However, since there are pipes having various outer diameters through which the building surface material is penetrated, the manufacturing cost increases when each of the pipe sealing members 100 having an inner diameter suitable for each outer diameter is manufactured. In addition, in order to be able to handle pipes having various outer diameters, contractors and the like also have a pipe sealing member 100 having an inner diameter suitable for each outer diameter pipe as stock, etc. The cost increases due to the securing of

  Then, in view of the said problem, this invention makes it a subject to provide the sealing member for piping which can be used with respect to piping of a different outer diameter, and its manufacturing method.

  Therefore, in order to solve the above-described problems, the present invention provides a piping sealing member for sealing a gap between a pipe penetrating a building surface material and the building surface material, wherein the piping can be inserted. It has a plate shape surrounding one through hole, and has a shape surrounding a base portion fixed to the building surface material and a second through hole having a diameter smaller than that of the first through hole. A plate-shaped seal portion having a superposed portion that is integrally overlapped with a peripheral portion of the first through-hole in the base portion in a state where the through-hole is located inside the first through-hole. The base portion is composed of a softer material than the base portion, and the overlapping portion and the portion of the base portion on which the overlapping portion overlaps each other have close contact surfaces that are closely attached to each other, and these close contact surfaces are fitted to each other. And these concavities and convexities are joined together. It is characterized in. In the present invention, the face material refers to a plate-like member having a surface having a certain width.

  According to such a configuration, since the seal portion is soft, the second through hole is easily deformed in the direction of expanding the diameter, and the outer diameter is larger than the diameter of the second through hole in a natural state while being expanded in this way. By inserting a pipe that is larger and smaller in diameter than the first through-hole into the second through-hole, the pipe is placed in a state where the outer peripheral surface of the pipe and the peripheral edge of the second through-hole of the seal portion are in close contact with each other. The second through hole can be inserted. And the range of the pipe diameter which the ease of the diameter expansion can apply is expanded. On the other hand, since the base part is made of a material harder than the seal part, when the base part is brought into close contact with the structural surface material around the pipe and fixed, the pipe is passed through the second through hole. It is easy to work without undulating the base part.

  Furthermore, the adhesion surface of the overlapping portion of the seal portion and the adhesion surface of the portion overlapping the overlapping portion of the base portion each include concavities and convexities that fit together, and are joined together in the fitted state, so that a smooth plate The area of the contact surface is large as compared with the case where the bodies are overlapped with each other, whereby the adhesive force is increased and the base portion and the seal portion are hardly peeled off, and particularly strong against the shearing force in the radial direction. Therefore, when the pipe is forcibly inserted into the second through hole, the seal portion is pulled inward from the base portion, so that the seal portion is effectively prevented from being peeled from the base portion in the shear direction. The In the present invention, the term “adhesive strength” simply refers to the magnitude of the force with which two surfaces stick together, and is not limited to the fact that the two surfaces stick together via an adhesive.

  In the piping sealing member according to the present invention, it is preferable that, in a portion having the close contact surface between the base portion and the seal portion, the close contact surface is recessed more than a surface adjacent thereto.

  According to such a configuration, a stepped surface is generated at the boundary position between the contact surface and the adjacent surface, and in a portion having the contact surface between the base portion and the seal portion, in addition to the contact surface, the base portion (or seal portion) When the stepped surface and the tip surface of the portion having the close contact surface of the seal portion (or base portion) are in close contact, the area of the close contact surface between the base portion and the seal portion is equal to the area of the close contact surface. To increase. For this reason, the adhesive force between the base portion and the seal portion is increased, and the base portion and the seal portion are more difficult to peel off.

  Since the base part and the seal part are each formed of resin, it is possible to prevent the occurrence of rust in the piping sealing member.

  It is preferable that the concave and convex portions have a shape in which the concave portions or the convex portions constituting the concave and convex portions are continuous over the entire circumference so as to surround the first through hole from the outside in the radial direction. According to such a configuration, in the portion where the base portion and the seal portion overlap with each other, the contact area increases over the entire outer periphery of the first through hole, and the adhesive force increases. Further, the base portion and the seal portion are strong against a shearing force in a direction along the radial direction over the entire outer periphery of the first through hole.

  Moreover, in order to solve the said subject, this invention is a method of manufacturing the sealing member for piping for sealing the clearance gap between the piping which penetrates the surface material for construction, and the said surface material for construction, Comprising: Forming a plate surrounding the first through-hole that can be inserted, a base portion forming step in which a base portion fixed to the building surface material is formed, and a second smaller in diameter than the first through-hole A plate having a shape surrounding the through-hole and having a superposed portion integrally overlapped with a peripheral portion of the first through-hole in the base portion in a state where the second through-hole is located inside the first through-hole A seal portion forming step in which a seal portion is formed, and in the base portion forming step, when the seal portion is formed in the seal portion forming step, the base overlaps and adheres to the overlapping portion of the seal portion The base part is formed so that the close contact surface of the part includes irregularities In the sealing portion forming step, a softer resin than the base portion is supplied onto the contact surface so as to fill the unevenness of the contact surface of the base portion without gaps, and the unevenness of the contact surface of the overlapping portion is The seal portion is joined to the base portion at the same time as the seal portion in a state of being fitted to the unevenness of the close contact surface of the base portion is formed.

  Moreover, it is a method of manufacturing the sealing member for piping for sealing the clearance gap between the piping which penetrates the building surface material, and the said building surface material, Comprising: The board which surrounds the 1st through-hole which can penetrate the said piping A base part forming step in which a base part fixed to the building surface material is formed, and a shape surrounding a second through hole having a diameter smaller than that of the first through hole. Forming a seal portion in which a plate-like seal portion having a superposed portion that is integrally overlapped with a peripheral portion of the first through hole in the base portion in a state where the two through holes are located inside the first through hole And in the seal portion forming step, when the base portion is formed in the base portion forming step, the close contact surface of the overlapping portion of the seal portion that is in close contact with the base portion includes irregularities. The seal part is made of a softer resin than the base part. In the base portion forming step, the resin is supplied onto the close contact surface of the overlap portion so as to fill the unevenness of the close contact surface of the overlap portion of the seal portion without any gap, and overlaps and adheres to the overlap portion of the seal portion. The base portion is joined to the seal portion simultaneously with the formation of the base portion in a state where the unevenness of the close contact surface of the base portion is fitted to the unevenness of the close contact surface of the overlapping portion of the seal portion. To do.

  According to these methods, since the formation of the seal portion and the joining of the seal portion to the base portion (or the formation of the base portion and the joining of the base portion to the seal portion) are performed at the same time, the seal portion and the base portion Therefore, it is not necessary to align the concave and convex portions of the close contact surfaces that are in close contact with each other, and the piping sealing member can be easily obtained.

  In addition, according to the manufacturing method, since the seal portion is soft, the second through hole is easily deformed in the direction of expanding the diameter, and the outer diameter of the second through hole is in a natural state while expanding in this way. By inserting a pipe having a diameter larger than that of the first through-hole and smaller than the diameter of the first through-hole into the second through-hole, the outer peripheral surface of the pipe and the peripheral portion of the second through-hole of the seal portion are in close contact with each other. The said piping sealing member which can insert piping into the said 2nd through-hole can be obtained. And in this sealing member for piping, the range of the piping diameter to which the easiness of the diameter expansion is applicable is expanded. On the other hand, since the base part is made of a material harder than the seal part, when the base part is brought into close contact with the structural surface material around the pipe and fixed, the pipe is passed through the second through hole. Workability is good because the base does not wave.

  Furthermore, the piping sealing member obtained by the manufacturing method includes a concave portion and a convex portion that are fitted to each other on the close contact surface of the overlapping portion of the seal portion and the close contact surface of the overlapping portion of the base portion. Since they are joined together in a state, the area of the contact surface is large compared to the case where smooth plate-like bodies are overlapped with each other, thereby increasing the adhesive force and making it difficult for the base part and the seal part to peel off, especially in the radial direction. It becomes strong against the shearing force along the direction. Therefore, when the pipe is forcibly inserted into the second through hole, the seal portion is pulled inward from the base portion, so that the seal portion is effectively prevented from being peeled from the base portion in the shear direction. The

  When the manufacture of the sealing member for piping is performed in the order of the base portion forming step and the seal portion forming step, the base portion forming step uses the base as a common mold that is also used in the next seal portion forming step. The base is formed by injecting a first resin raw material into an internal space formed in the molds together with a first mold that forms irregularities on the contact surface of the part, and the seal In the part forming step, the second mold is combined with the common mold in which the base portion is formed, and the inner space formed in these molds is softer than the first resin. It is preferable that the seal portion is joined to the base portion simultaneously with the formation by injecting the raw material of the second resin. In addition, when manufacturing the sealing member for piping is performed in the order of the seal portion forming step and the base portion forming step, the seal portion forming step is common to this step and the next base portion forming step. The common mold used is combined with the first mold having a shape that forms irregularities on the contact surface of the overlapping portion of the seal portion, and is used in the base portion forming step in the internal space formed in these molds. The sealing part is formed by injecting a raw material of the second resin softer than the first resin to be formed, and in the base part forming step, the first mold is removed, and the inside is A second mold is aligned with the common mold in a state where a seal portion is formed, and the raw material of the first resin is injected into an internal space formed in the mold, whereby the base portion is At the same time the base is formed, It is preferably bonded to the Lumpur unit.

  According to these configurations, the shape of the contact surface is complicated by performing so-called two-color molding, in which the first mold and the second mold are sequentially aligned with the common mold, and injection molding is performed. In addition, the adhesion surface of the base portion and the adhesion surface of the overlapping portion of the seal portion can be easily adhered with less man-hours. Therefore, it is possible to easily obtain a piping sealing member in which peeling or pinholes are unlikely to occur at a portion where the base portion and the seal portion overlap. Further, the obtained sealing member for piping does not rust because the base portion and the seal portion are each formed of resin.

  As mentioned above, according to this invention, the sealing member for piping which can be used also with respect to piping from which a diameter differs, and its manufacturing method can be provided.

  Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings.

  The piping sealing member according to the present embodiment (hereinafter also simply referred to as “sealing member”) includes a pipe that penetrates a building wall such as a house, a structural plywood, and a building surface material such as a floor. It is used to seal the gap in order to prevent water and the like from entering through the gap with the surrounding building surface material.

  Specifically, as shown in FIGS. 1 to 2C, the sealing member 10 includes a base portion 12 and a seal portion 20 which are plate-like members.

  The base portion 12 is a portion fixed to the building surface material M, and is a plate-like body provided with a first through hole 14 into which a pipe P (see FIG. 3) can be inserted. The base portion 12 has a hardness that does not cause the base portion 12 to wave when it is fixed to at least the building surface material M. Specifically, the base portion 12 has a substantially square outline, and a first through hole 14 is provided in the center. And this building surface material M is formed with the 1st resin. In the present embodiment, the outline of the base portion 12 is a substantially square with rounded four corners, and the first through hole 14 is a circular through hole that penetrates the base portion 12 in the thickness direction.

  Moreover, the base part 12 has a base part overlapping part 16 on which the seal part 20 is overlapped. The base overlapping portion 16 is formed at the peripheral portion of the first through hole of the base portion 12. Specifically, the base portion overlapping portion 16 includes an edge that surrounds the first through hole 14 in the base portion 12, and is an annular portion having a constant width along the edge.

  The seal part 20 is a plate-like body provided with a second through-hole 22 having a smaller diameter than the first through-hole 14, and is made of a softer material than the base part 12. When the second through hole 22 is overlapped with the base portion 12 in a state where the second through hole 22 is located inside the first through hole 14, the seal portion 20 has a peripheral portion of the first through hole 14 of the base portion 12. (Base part superposition part) It has the seal | sticker part superposition | polymerization part 24 superimposed on 16 integrally. In other words, when the seal portion 20 is overlapped with the base portion 12, the outer peripheral portion (seal portion overlapping portion) 24 is the peripheral portion (base portion overlapping portion) 16 of the first through hole 14 of the base portion 12. Has an outer diameter and a contour that overlap with each other. The seal portion overlapping portion 24 has an annular shape with a constant width along the first through hole 14.

  Specifically, the seal part 20 has a circular outline, and a second through hole 22 is provided at the center. When the seal portion 20 allows the pipe P having a diameter larger than that of the second through hole 22 in the natural state and smaller than that of the first through hole 14 of the base portion 12 to be inserted into the second through hole 22. In addition, the seal portion 20 is formed of a soft material that can be inserted through the pipe P by being deformed in the direction of expanding the diameter. In the present embodiment, the seal portion 20 is formed of a second resin that is softer than the base portion 12. And the 2nd through-hole 22 is provided in the seal part 20 so that it may penetrate the seal part 20 in the thickness direction, and may become a concentric circle with the circular outline of the said seal part 20.

  The base portion overlapping portion 16 and the seal portion overlapping portion 24 have close contact surfaces (base portion close contact surface 16a, seal portion close contact surface 24a) that are in close contact with each other. The base portion overlapping portion 16 and the seal portion overlapping portion 24 include concavities and convexities that are fitted to the contact surfaces 16a and 24a, and are joined in a state in which these concavities and convexities are fitted to each other. Specifically, in the base overlapping portion 16 and the seal overlapping portion 24, the contact surfaces 16a and 24a are recessed from the adjacent surfaces 16b and 24b (see FIG. 2B). Due to this recess, a step surface 17 is formed at the boundary position between the surface adjacent to the base portion contact surface 16a and 16b, and a step surface 25 is generated at the boundary position between the seal portion contact surface 24a and the adjacent surface 24b. Moreover, the unevenness | corrugation of contact | adherence surface 16a, 24a has a shape which continues over the perimeter so that the concave or convex which comprises this unevenness may each surround the 1st through-hole 14 from a radial direction outer side.

  For example, as shown in FIG. 3, such a sealing member 10 seals a gap between an overflow pipe (pipe) P of a veranda and a building surface material M, and passes water such as rainwater from the outside through the gap. Deters intrusion into the interior. Specifically, the pipe P penetrating the building surface material M is inserted into the second through hole 22 of the sealing member 10, and the pipe P is connected until the base portion 12 is in close contact with the building surface material M around the pipe P. The sealing member 10 is moved along. A tape t is affixed around the base portion 12 that is in close contact with the building surface material M. In this way, the gap between the pipe P and the building surface material M is sealed. At this time, since the pipe P having a diameter larger than the diameter of the second through hole 22 in the natural state is inserted into the second through hole 22, the seal portion 20 is pulled in the insertion direction of the pipe P while the second The through hole 22 is deformed in the diameter increasing direction.

  Next, a method for manufacturing the sealing member 10 will be described with reference to FIGS.

  In this embodiment, the sealing member 10 is manufactured by so-called two-color molding. This two-color molding has a base portion forming step for forming the base portion 12 and a seal portion forming step for forming the seal portion 20, and a mold is used in each step. This mold is a common mold 30, a first mold 32, and a second mold 34 (see FIG. 4A).

  The common mold 30 is a mold used in common for the base portion forming step and the seal portion forming step. The first mold 32 is a mold for forming the base portion 12 in conformity with the common mold 30. The inner surface of the first mold 32 includes a surface 116 having a shape corresponding to the unevenness for forming the unevenness of the base portion contact surface 16a (see an enlarged view of FIG. 4B). The second mold 34 is a mold for forming the seal portion 20 in accordance with the common mold 30 in which the base portion 12 is formed.

  The mold according to the present embodiment includes a lower mold 40 in which two common molds 30 are arranged side by side and connected, and an upper mold in which a first mold 32 and a second mold 34 are arranged side by side and connected to each other. 42 is opposed to the upper and lower sides, and one mold (the lower mold 40 in the present embodiment) is configured to be horizontally reversible.

  In the base portion forming step, the first die 32 is aligned with the common die 30, and the base portion 12 is formed by injecting the raw material of the first resin into the die. In the seal portion forming step, the first die 32 is removed, and the second die 34 is aligned with the common die 30 in the state where the base portion 12 is formed therein, and these molds are placed in the die. The seal part 20 is joined to the base part 12 at the same time as the seal part 20 is formed by injecting the second resin softer than the first resin.

  Specifically, in the initial state, the opened upper mold 42 and lower mold 40 are closed (step 1: see FIG. 4 (a) and FIG. 4 (b)). At this time, the first mold 32 is aligned with the common mold 30 on the base forming side (the left side in FIGS. 4A to 5C).

  An internal space S1 formed inside the base portion forming side of the closed upper die 42 and the lower die 40, that is, inside the closed common die 30 and the first die 32 (FIG. 4 ( The raw material of the first resin is filled in (see the enlarged view of b) (step 2: see FIG. 4C). The base portion 12 is completed by cooling and solidifying the raw material.

  Next, the upper mold 42 and the lower mold 40 are opened (see FIG. 4D), and the lower mold 40 is inverted so that the left and right sides of the lower mold 40 are interchanged (step 3). : Refer to FIG. 5 (a)). Thereby, the common metal mold | die 30 in the state in which the base part 12 was formed inside moves to the seal part formation side. In this state, the upper mold 42 and the lower mold 40 are closed, so that the second mold 34 is aligned with the common mold 30 with the base portion 12 formed therein on the seal portion forming side. (Step 4: see FIG. 5B).

  The base portion 12 of the internal space formed inside the seal portion forming side between the closed upper die 42 and the lower die 40, that is, inside the closed common die 30 and the second die 34. A raw material of the second resin is filled into the internal space S2 (see FIG. 5B) except for (step 5: see FIG. 5B). In this way, the inner space S2 excluding the base portion 12 is filled with the second resin material in a state where the base portion 12 exists in the inner space, so that the unevenness of the base portion contact surface 16a can be made without gaps. The raw material of the second resin is supplied onto the base part contact surface 16a so as to fill (see the enlarged view of FIG. 5C). The raw material of the second resin filled in the internal space S2 inside the closed common mold 30 and the second mold 34 is cooled and solidified, so that the seal portion 20 is formed and sealed at the same time. The part 20 is joined to the base part 12. In this joining part, it joins in the state which the unevenness | corrugation of the base part contact | adherence surface 16a and the unevenness | corrugation of the seal | sticker part contact | adherence surface 24a fitted.

  The upper mold 42 and the lower mold 40 are opened, and the formed sealing member 10 is taken out (step 6).

  In the present embodiment, as the molds, there are a lower mold 40 in which the common mold 30 is arranged on the left and right, and an upper mold 42 in which the first mold 32 and the second mold 34 are arranged on the left and right. Since it is used, injection molding can be performed simultaneously on the base portion forming side and the seal portion forming side. In that case, in step 5, when the upper mold 42 and the lower mold 40 are closed, the common mold 30 and the first mold 32 which are in the closed state on the base portion forming side The raw material of the first resin is injected into the internal space S1 (step 1), and the seal portion 20 is formed on the seal portion forming side, and at the same time, the base portion 12 is formed on the base portion forming side (step 2). Then, step 3 to step 6 are performed. By repeating this, the sealing member 10 is continuously formed.

  The sealing member 10 as described above is easily deformed in the direction in which the diameter of the second through hole 22 is increased because the seal portion 20 is a soft second resin. And the range of the pipe diameter which the ease of the diameter expansion can apply is expanded. On the other hand, since the base portion 12 is made of the first resin that is harder than the seal portion 20, the pipe P is passed through the second through hole 22, and the base portion 12 is a building surface material around the pipe P. When closely contacting and fixing to M, the base portion 12 does not wavy and the operation is easy.

  Further, the seal portion close contact surface 24a and the base portion close contact surface 16a include concavities and convexities that fit together, and are joined together in the fit state, so that compared to the case where smooth plate-like bodies are stacked together. Thus, the area of the contact surface is large, whereby the adhesive force is increased and the base portion 12 and the seal portion 20 are not easily peeled off, and particularly strong against the shearing force in the radial direction. Therefore, when the pipe P is forcibly inserted into the second through-hole 22, the seal portion 20 is pulled inward from the base portion 12, whereby the seal portion 20 is peeled from the base portion 12 in the shear direction. Is effectively suppressed.

  Moreover, the concave and convex portions of the contact surfaces 16a and 24a have a shape in which the concave or convex constituting the concave and convex portions are continuous over the entire circumference so as to surround the first through hole 14 from the radially outer side. In the portions 16 and 24 where the seal portion 20 overlaps, the adhesion area is increased over the entire outer periphery of the first through-hole 14 and the adhesive force is increased. Further, the base portion 12 and the seal portion 20 are strong against the shearing force in the direction along the radial direction over the entire outer periphery of the first through hole 14.

  Further, since the base portion contact surface 16a is recessed from the surface 16b adjacent to the base portion contact surface 16b (see FIG. 2B), the step surface 17 is generated at the boundary position between the base portion contact surface 16a and the adjacent surface 16b. Yes. Similarly, since the seal portion contact surface 24a is recessed from the adjacent surface 24b (see FIG. 2B), a step surface 25 is generated at the boundary position between the seal portion contact surface 24a and the adjacent surface 24b. ing. Therefore, the portion having the contact surfaces 16a and 24a between the base portion 12 and the seal portion 20 has the step surface 17 of the base portion 12 and the seal portion contact surface 24a of the seal portion 20 in addition to the contact surfaces 16a and 24a. The tip surface 26 of the part is in close contact, and the stepped surface 25 of the seal part 20 and the tip surface 18 of the part having the base part contact surface 16a of the base part 12 are in close contact with each other. The area of the surface where the base portion 12 and the seal portion 20 are in close contact with each other increases. As a result, the adhesive force between the base portion 12 and the seal portion 20 is increased, and the base portion 12 and the seal portion 20 are more difficult to peel off.

  Moreover, in this embodiment, since the base part 12 and the seal | sticker part 20 are each formed with resin, ie, the whole sealing member 10 is formed with resin, generation | occurrence | production of the rust in the said sealing member 10 is prevented. it can.

  Since the manufacturing method according to the present embodiment is manufactured by two-color molding, the formation of the seal portion 20 and the joining of the seal portion 20 to the base portion 12 are performed simultaneously (FIG. 5A to FIG. 5). 5 (c)), the positioning for fitting the unevenness of the close contact surfaces 16a, 24a of the seal portion 20 and the base portion 12 to each other becomes unnecessary, and the sealing member 10 can be easily obtained.

  In the two-color molding, the first mold 32 and the second mold 34 are sequentially aligned with the common mold 30 and injection-molded. Therefore, even if the shapes of the contact surfaces 16a and 24a are complicated, the base The part adhesion surface 16a and the seal part adhesion surface 24a can be easily adhered with less man-hours. Therefore, it is possible to easily obtain the sealing member 10 in which peeling, pinholes, and the like are unlikely to occur at the portion where the base portion 12 and the seal portion 20 overlap (base portion overlapping portion 16 and seal portion overlapping portion 24).

  Next, a second embodiment of the present invention will be described. The sealing member 10 according to the present embodiment has the same configuration as that of the first embodiment, and therefore the description thereof is omitted. Only the manufacturing method thereof is shown in FIG. This will be described with reference to FIGS. In addition, the same code | symbol is used for the structure similar to the said 1st Embodiment, and detailed description is abbreviate | omitted.

  In the present embodiment, unlike the first embodiment, the forming process is performed in the order of the seal part forming process and the base part forming process. As the mold, the common mold 30, the third mold 132, and the fourth mold 134 are used (see FIG. 7A).

  The third mold 132 is a mold for forming the seal portion 20 in conformity with the common mold 30. The inner surface of the third mold 132 includes a surface 224 having a shape corresponding to the unevenness for forming the unevenness of the seal portion contact surface 24a (see an enlarged view of FIG. 7B). The 4th metal mold | die 134 is a metal mold | die for match | combining with the common metal mold | die 30 in the state in which the seal part 20 was formed in the inside, and forming the base part 12. FIG.

  In the present embodiment, the mold is an upper mold in which a lower mold 40 in which two common molds 30 are arranged side by side and connected, and a third mold 132 and a fourth mold 134 are arranged side by side in the left and right. The mold 142 is vertically opposed.

  In the seal portion forming step of the present embodiment, the third die 132 is aligned with the common die 30, and a second resin that is softer than the first resin used in the base portion forming step is placed in these die. The seal part 20 is formed by being injected. In the base portion forming step, the third die 132 is removed, and the fourth die 134 is aligned with the common die 30 in a state where the seal portion 20 is formed inside. The base portion 12 is formed at the same time as the base portion 12 is formed by injecting the first resin into the seal portion 20.

  Specifically, in the initial state, the opened upper mold 42 and lower mold 40 are closed (step 11: see FIGS. 7A and 7B), and the closed upper mold 142 is closed. A material for the second resin is filled in an internal space S3 (see an enlarged view of FIG. 7B) formed inside the seal portion forming side between the lower mold 40 and the lower mold 40 (step 12: FIG. 4). (See (c)). Then, after the filled second resin is cooled and hardened, the upper mold 142 and the lower mold 40 are opened (see FIG. 7D), so that the left and right of the lower mold 40 are switched. The lower mold 40 is inverted (step 13: see FIG. 8A). In this inverted state, the upper mold 142 and the lower mold 40 are closed (step 14: see FIG. 5B).

  Of the internal space formed on the base portion forming side of the closed upper die 142 and the lower die 40, the inner space S4 (see FIG. 8B) excluding the seal portion 20 is filled with the first resin. The raw material is filled (step 15: see FIG. 8B). In this manner, the first resin material is filled in the internal space S4 excluding the seal portion 20 in a state where the seal portion 20 exists in the internal space, so that the unevenness of the seal portion contact surface 24a can be made without gaps. The raw material of the first resin is supplied onto the seal portion contact surface 24a so as to fill (see the enlarged view of FIG. 8C). Then, the first resin material filled in the internal space S4 is cooled and solidified, whereby the base portion 12 is formed and the base portion 12 is joined to the seal portion 20 at the same time. In this joining part, it joins in the state which the unevenness | corrugation of the seal | sticker contact | adherence surface 24a and the unevenness | corrugation of the base part contact | adherence surface 16a fitted.

  The upper mold 142 and the lower mold 40 are opened, and the formed sealing member 10 is taken out (step 16).

  Also in the manufacturing method according to this embodiment, since the manufacturing is performed by two-color molding, the formation of the base portion 12 and the joining of the base portion 12 to the seal portion 20 are performed simultaneously (FIGS. 8A to 8). (C)) This eliminates the need for alignment for fitting the concave and convex portions of the close contact surfaces 16a and 24a in close contact with each other between the base portion 12 and the seal portion 20.

  Further, even if the shapes of the contact surfaces 16a and 24a are complicated, the seal portion contact surface 24a and the base portion contact surface 16a can be easily attached with a small number of man-hours. The difficult sealing member 10 can be obtained easily.

  By using the sealing member 10 and inserting the pipes P having various outer diameters into the second through holes 22 of the sealing member 10, the following results were obtained.

  The sealing member 10 has a base portion 12 made of polyethylene (PE) and a seal portion 20 made of styrene-based thermoplastic elastomer (TPE). The base portion 12 of the sealing member 10 has a length (vertical direction in FIG. 1) and a length (horizontal direction in FIG. 1) of 185 mm and a thickness (front-rear direction in FIG. 1) of 0.8 mm. The first through hole 14 of the base portion 12 is a circular through hole having a diameter (inner diameter) of 80 mm that penetrates the base portion 12 in the thickness direction. On the other hand, the seal portion 20 is an annular plate having an outer diameter of 90 mm, an inner diameter (diameter of the second through hole 22) of 40 mm, and a thickness of 0.8 mm. Such a base portion 12 and the seal portion 20 have a peripheral portion of the first through hole 14 of the base portion 12 and an outer peripheral portion of the seal portion 20 such that the overlap margin (the radial width of the overlap portion) is 10 mm. And are formed to overlap. Such a soft part in the sealing member 10, that is, a part excluding the seal part overlapping part 24 of the seal part 20 is formed in an annular shape having an inner diameter of 40 mm and an outer diameter of 80 mm.

  When the pipes P having various outer diameters are inserted into the second through holes 22 of the sealing member 10 formed of such shapes and materials, the sealing member 10 is applied to the pipe P having an outer diameter of 48 mm to 65 mm. I understood that I could do it. That is, if the pipe P has an outer diameter in such a range, when the pipe P is inserted through the second through hole 22, the second through hole 22 is pushed and expanded (in the diameter increasing direction). It has been found that the seal portion 20 is not damaged (due to the deformation of), and that the intimate contact between the peripheral edge of the second through hole of the seal portion 20 and the pipe outer peripheral surface after insertion is suitably maintained.

  The sealing member and the manufacturing method thereof according to the present invention are not limited to the first and second embodiments, and various changes can be made without departing from the scope of the present invention.

  In the sealing member 10, the material of the base part 12 is not limited. For example, the base portion 12 is formed of polyethylene in the embodiment, but may be formed of other resins. Further, in the manufacture of the sealing member 10, when the base portion is formed first and the seal portion is formed after that, the base portion 12 may be formed of metal. In the case where the seal portion is formed first and then the base portion is formed, both the seal portion 20 and the base portion 12 are formed of resin.

  In the sealing member 10, the material of the seal portion 20 is not limited. For example, the seal portion 20 is formed of a styrene-based thermoplastic elastomer in the embodiment, but may be other resin as long as it is a softer material than the material of the base portion 12.

  Moreover, the manufacturing method of the sealing member 10 is not limited. For example, in the first embodiment, the sealing member 10 is manufactured by two-color molding. However, when the base portion forming step and the seal portion forming step are sequentially performed, the sealing member 10 is manufactured by other manufacturing methods such as insert molding. May be.

  In addition, unlike the first and second embodiments, the base portion 12 and the seal portion 20 do not need to be integrally formed. For example, the sealing member 10 may be formed by forming the base portion 12 and the seal portion 20 separately, and then bonding the contact surfaces 16a and 24a to each other.

It is a front view of the sealing member for piping concerning a 1st embodiment. (A) in the sealing member for piping which concerns on the embodiment is AA sectional drawing of FIG. 1, (b) is the elements on larger scale of the site | part with which the base part and seal part of FIG. 2 (a) have overlapped. (C) is a cross-sectional view in which the thickness of the piping sealing member is increased 10 times in the AA cross section of FIG. 1 in order to show the configuration of the contact surface. It is a figure which shows the use condition of the sealing member for piping which concerns on the same embodiment. It is a figure which shows the motion of the metal mold | die before lower mold inversion at the time of manufacturing the sealing member for piping which concerns on the embodiment. It is a figure which shows the motion of the metal mold | die after inversion of the lower metal mold | die at the time of manufacturing the sealing member for piping which concerns on the embodiment. It is a figure which shows the flow of the manufacture process of the sealing member for piping which concerns on the same embodiment. It is a figure which shows the motion of the metal mold | die before inversion of a lower mold at the time of manufacturing the sealing member for piping which concerns on 2nd Embodiment. It is a figure which shows the motion of the metal mold | die after inversion of the lower metal mold | die at the time of manufacturing the sealing member for piping which concerns on the embodiment. It is a figure which shows the flow of the manufacture process of the sealing member for piping which concerns on the same embodiment. In the conventional sealing member for piping, (a) is a front view, (b) is BB sectional drawing of Fig.6 (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Sealing member 12 for piping Base part 14 1st through-hole 16 Base part superposition | polymerization part (periphery part of 1st through-hole)
16a Base part contact surface (contact surface)
20 Seal portion 22 Second through hole 24 Seal portion overlapping portion (overlapping portion)
24a Seal part contact surface (contact surface)
30 Common mold 32 First mold 34 Second mold M Construction face material P Piping

Claims (8)

A pipe sealing member for sealing a gap between a pipe penetrating the building surface material and the building surface material,
A plate shape surrounding the first through-hole through which the pipe can be inserted, and a base portion fixed to the building surface material;
The first through hole in the base portion has a shape surrounding a second through hole having a diameter smaller than that of the first through hole, and the second through hole is located inside the first through hole. A plate-like seal portion having a superposed portion that is integrally overlapped with a peripheral portion of the hole,
This seal part is made of a softer material than the base part,
The overlapping portion and the portion of the base portion on which the overlapping portion overlaps each other have close contact surfaces that are in close contact with each other, and these close contact surfaces include concavities and convexities that fit into each other, Sealing member for piping characterized by being joined. In the piping sealing member according to claim 1,
The piping sealing member characterized in that, in the portion having the close contact surface between the base portion and the seal portion, the close contact surface is recessed from a surface adjacent thereto. In the sealing member for piping according to claim 1 or 2,
The pipe sealing member, wherein the base part and the seal part are each formed of a resin. In the piping sealing member according to any one of claims 1 to 3,
The sealing member for piping according to claim 1, wherein the recesses and protrusions constituting the recesses and protrusions have a shape that extends continuously over the entire circumference so as to surround the first through hole from the outside in the radial direction. A method of manufacturing a pipe sealing member for sealing a gap between a pipe penetrating a building surface material and the building surface material,
Forming a plate surrounding the first through-hole through which the pipe can be inserted, and forming a base part fixed to the building surface material, a base part forming step,
The first through hole in the base portion has a shape surrounding a second through hole having a diameter smaller than that of the first through hole, and the second through hole is located inside the first through hole. And a seal part forming step in which a plate-like seal part having a superposed part that is integrally stacked on the peripheral part of the hole is formed,
In the base portion forming step, the base portion is formed such that the close contact surface of the base portion that is in close contact with the overlapped portion of the seal portion when the seal portion is formed in the seal portion forming step includes unevenness. ,
In the sealing portion forming step, a softer resin than the base portion is supplied onto the close contact surface so as to fill the unevenness of the close contact surface of the base portion without gaps, and the unevenness of the close contact surface of the overlapping portion is the base portion. A method for manufacturing a sealing member for piping, wherein the sealing portion is joined to the base portion at the same time as the sealing portion in a state of being fitted to the unevenness of the contact surface is formed. A method for manufacturing the piping sealing member according to claim 5,
In the base portion forming step, a first die having a shape that forms irregularities on the contact surface of the base portion is combined with a common die that is commonly used in this step and the next seal portion forming step. The base portion is formed by injecting the raw material of the first resin into the internal space formed in these molds,
In the sealing part forming step, the first mold is removed, and the second mold is aligned with the common mold in the state where the base part is formed, and formed in these molds. The seal portion is joined to the base portion at the same time as the seal portion is formed by injecting a raw material of the second resin softer than the first resin into the inner space. The manufacturing method of the sealing member for piping made into. A method of manufacturing a pipe sealing member for sealing a gap between a pipe penetrating a building surface material and the building surface material,
Forming a plate surrounding the first through-hole through which the pipe can be inserted, and forming a base part fixed to the building surface material, a base part forming step,
The first through hole in the base portion has a shape surrounding a second through hole having a diameter smaller than that of the first through hole, and the second through hole is located inside the first through hole. And a seal part forming step in which a plate-like seal part having a superposed part that is integrally stacked on the peripheral part of the hole is formed,
In the sealing part forming step, when the base part is formed in the base part forming step, it is softer than the base part so that the adhesion surface of the overlapping part of the sealing part that overlaps and adheres to the base part includes unevenness. The seal part is formed of a simple resin,
In the base portion forming step, the base is supplied on the adhesion surface of the overlapping portion so that the resin fills the unevenness of the adhesion surface of the overlapping portion of the seal portion without gaps, and overlaps and adheres to the overlapping portion of the seal portion. The base portion is joined to the seal portion simultaneously with the formation of the base portion in a state where the unevenness of the close contact surface of the portion is fitted to the unevenness of the close contact surface of the overlapping portion of the seal portion. Manufacturing method of sealing member for piping. A method for producing the piping sealing member according to claim 7,
In the seal portion forming step, a first die having a shape for forming irregularities on the contact surface of the overlapping portion of the seal portion is used as a common die commonly used in this step and the next base portion forming step. The seal portion is formed by injecting a raw material of the second resin softer than the first resin used in the base portion forming step into the internal space formed in these molds,
In the base portion forming step, the first mold is removed, and the second mold is aligned with the common mold in the state where the seal portion is formed therein, and formed in these molds. The base part is formed by injecting the raw material of the first resin into the inner space, and the base part is joined to the seal part at the same time. Method.

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