JP2011112140A - Seal material and joint water-leakage preventing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the rupture of a seal material to achieve sealing performance over a long period by allowing the seal material to move following the relative displacement of both members with a gap between the both member sealed. <P>SOLUTION: The seal material 10 includes a viscoelastic body 11 formed cylindrical, and a film material 12 fixed to the inner peripheral face of the viscoelastic body 11 to cover the inner peripheral face. In the sealing condition of the seal material 10, the press-contact faces press-contacting each other of the film material 12 have sliding characteristics for allowing the slide in the direction of intersecting the direction of receiving press-contacting force. The rubber 11 and the film material 12 roll as the press-contact faces of the film material 12 slide. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sealing material for sealing between two members and a joint water leakage preventing structure for preventing water leakage from the joint in a water channel.

  Conventionally, for example, a plurality of U-shaped waterway constituent members are connected to form a waterway. A sealing material is provided between adjacent waterway constituent members to prevent water in the waterway from leaking. As this kind of sealing material, for example, as disclosed in Patent Document 1, a material coated with adhesive butyl rubber is known. As shown in FIG. 17, this type of sealing material 100 is disposed between the first water channel component member 101 and the second water channel component member 102 and used in a state where it receives a compressive force.

JP 2001-302827 A

  However, after the construction of the water channel, the first water channel component member 101 becomes the second water channel component member 102 due to changes in the surrounding environment such as land subsidence, running vibration of the vehicle, and expansion and contraction due to ambient temperature changes. May be displaced. There are various displacement directions, such as the direction in which the water channel extends, the width direction of the water channel, and the direction inclined with respect to the direction in which the water channel extends. For example, as shown in FIG. The seal member 100 may be displaced in a shearing direction with respect to the water channel constituent member 102. When displaced in this direction, there are the following problems. That is, since the sealing material 100 adheres to the first water channel constituent member 101 and the second water channel constituent member 102, the sealing material 100 receives a force in the shearing direction. When the amount of displacement in the shear direction is small, the displacement can be absorbed by deformation of the sealing material 100 itself, but depending on the channel construction site, the amount of displacement may be so large that it cannot be absorbed by deformation of the sealing material 100. Furthermore, the sealing material 100 receives water pressure from within the water channel. As shown in FIG. 19, the sealing material 100 that has been subjected to water pressure and has received a force due to a large displacement may tear, and as a result, the sealing material 100 does not perform the sealing function.

  The present invention has been made in view of such a point, and the object of the present invention is to enable the sealing material to move following the relative displacement of both members in a state where the two members are sealed. By doing so, it is intended to suppress tearing of the sealing material, and thereby to obtain a sealing property over a long period of time.

  1st invention is the sealing material which seals between the 1st member and the 2nd member. WHEREIN: It is this inner periphery with respect to the viscoelastic body formed in the cylinder shape, and the inner peripheral surface of the said viscoelastic body. A film material fixed so as to cover the surface, and disposed between the first and second members and in a state of being sandwiched between the two members and being sealed between the two members, Among the film materials, at least the pressure contact surfaces that are in pressure contact with each other have a slip property that allows sliding in a direction that intersects the direction in which the pressure contact force is received, and the relative displacement of the first and second members causes the film material to slide. The viscoelastic body and the film material are configured to roll between the first and second members by sliding the pressure contact surface.

  According to this configuration, in a state where the first and second members are sealed, the viscoelastic body is deformed so as to be in close contact with both the members between the first and second members, thereby obtaining a sealing property.

  And, for example, when the first member is displaced with respect to the second member and the displacement direction is a direction that shears the sealing material in a direction that intersects the thickness direction of the sealing material, The pressure contact surface of the film material slides inside the seal material, and the viscoelastic body and the film material roll between the first and second members. As a result, the sealing material moves following the displacement of the first member. Therefore, the sealing material does not generate a large force that causes the sealing material to break. In addition, when the second member is displaced, the sealing material rolls and follows in the same manner.

  The second invention is characterized in that, in the first invention, the viscoelastic body is provided with a viscoelastic body-side deficient portion formed by missing a part of the viscoelastic body.

  According to this configuration, the amount of viscoelastic body used can be reduced.

  A third invention is characterized in that, in the second invention, a film material-side defect portion formed by losing the film material is provided in a portion corresponding to the viscoelastic body-side defect portion in the film material. Is.

  According to this structure, it becomes possible to introduce air into the inside of the sealing material from the film material-side missing portion. Thereby, for example, when the first and second members are displaced so as to inflate the sealing material, the first and second members are displaced without difficulty by inflating the sealing material by introducing air into the inside of the sealing material. It becomes possible to follow.

  According to a fourth invention, in any one of the first to third inventions, the outer peripheral surface of the viscoelastic body has adhesiveness that adheres to at least one of the first and second members when in a sealed state. It is characterized by that.

  According to this configuration, the sealing performance between the first and second members is further improved.

  According to a fifth invention, in any one of the first to third inventions, at least a part of the outer peripheral surface of the viscoelastic body has non-adhesiveness to the first and second members. It is a feature.

  That is, if the entire outer peripheral surface of the viscoelastic body is adhered to the first and second members, the sealing material may not easily roll depending on the conditions. Since at least a part of the elastic body has non-adhesiveness, it is possible to reduce the adhesive area to the first and second members and facilitate the rolling of the sealing material.

  A sixth invention is characterized in that, in any one of the first to fourth inventions, the viscoelastic body and the film material are folded so as to overlap in the thickness direction.

  According to this configuration, for example, when the dimension between the first and second members is long, the shape of the sealing material is changed to the first by simply folding the viscoelastic body and the film material and stacking them in the thickness direction. And it becomes possible to make it the shape corresponding to the dimension between 2nd members.

  7th invention is the joint water leakage prevention structure comprised so that the leak from the joint of the 1st member and the 2nd member arranged so that a water channel might be formed was prevented using a sealing material. The sealing material includes a viscoelastic body formed in a cylindrical shape, and a film material fixed so as to cover the inner peripheral surface with respect to the inner peripheral surface of the viscoelastic body. When the two members are in a state of being sealed between the two members and being sandwiched between the two members, at least the press contact surfaces that are in pressure contact with each other are in a direction to receive the press contact force. Relative displacement of the first and second members when the sealing material is in a state of sealing between the first and second members, and is configured to have slipperiness that allows sliding in the intersecting direction. By sliding the pressure contact surface of the film material What it is characterized in that the sealing material is configured to roll between the first and second members.

  According to this configuration, when preventing water leakage from the joint, it is possible to move the sealing material following the relative displacement of the first and second members, as in the first invention. A large force that causes the sealing material to break is not generated in the sealing material.

  According to the first invention, the film material is fixed to the inner peripheral surface of the cylindrical viscoelastic body, and the pressure contact surface of the film material is slid when the film is in a state of sealing between the first and second members. Since the viscoelastic body and the film material are caused to roll between the first and second members, when the first and second members are relatively displaced in such a direction as to shear the sealing material, The sealing material can be caused to follow in the direction of rolling. Thereby, the tearing of a sealing material can be suppressed and a sealing performance can be obtained over a long period of time.

  According to 2nd invention, the usage-amount of a viscoelastic body can be suppressed and cost can be reduced by providing the viscoelastic body side defect | deletion part in a part of viscoelastic body.

  According to the third invention, by providing the film material-side missing portion in the film material, air can be introduced into the seal material when the first and second members are displaced so as to expand the seal material. . Thereby, the sealing material can be deformed so as to follow the displacement of the first and second members, and the sealing performance can be further improved.

  According to the fourth invention, since the outer peripheral surface of the viscoelastic body adheres to at least one of the first and second members, the sealing performance can be further improved.

  According to the fifth aspect, since at least a part of the outer peripheral surface of the viscoelastic body has non-adhesiveness, the sealing material can be easily rolled and the tearing of the sealing material can be reliably suppressed.

  According to the sixth invention, when the dimension between the first and second members is long, the viscoelastic body and the film material are folded so as to overlap each other in the thickness direction, so that it can be handled easily and at low cost. .

  According to the seventh aspect, since the tearing of the sealing material can be suppressed similarly to the first aspect, water leakage from the joint can be prevented over a long period of time.

It is a perspective view of the sealing material concerning Embodiment 1. FIG. It is a perspective view which shows a part of water channel. It is the III-III sectional view taken on the line of FIG. It is sectional drawing which expands and shows the sealing material in a sealing state. FIG. 4 is a view corresponding to FIG. 3 showing a state in which the water channel constituent member is displaced in a direction in which the sealing material is sheared. FIG. 4 is a view corresponding to FIG. 3 showing a state in which the water channel constituent member is displaced in the thickness direction of the sealing material. FIG. 5 is a diagram corresponding to FIG. 4 according to the second embodiment. FIG. 4 is a diagram corresponding to FIG. 3 according to the second embodiment. FIG. 6 is a diagram corresponding to FIG. 5 according to the second embodiment. FIG. 7 is a view corresponding to FIG. 6 according to the second embodiment. FIG. 5 is a diagram corresponding to FIG. 5 according to the third embodiment. FIG. 6 is a diagram corresponding to FIG. 4 according to Modification 1; FIG. 9 is a view corresponding to FIG. 4 according to Modification 2. FIG. 10 is a diagram corresponding to FIG. 4 according to Modification 3. It is a figure which shows the shaping | molding method of the film material concerning the modification 4. It is a figure which shows the film material concerning the modification 5. It is a fragmentary sectional view of the waterway concerning a prior art example. FIG. 18 is a view corresponding to FIG. 17 illustrating a state in which a waterway constituent member according to a conventional example is displaced in a direction of shearing the sealing material. FIG. 18 is a view corresponding to FIG. 17 illustrating a state in which the waterway constituent member according to the conventional example is greatly displaced in a direction in which the sealing material is sheared.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

(Embodiment 1)
FIG. 2 shows a water channel A provided with a joint leakage prevention structure 1 according to Embodiment 1 of the present invention. In the description of this embodiment, the water channel A will be described before the joint water leakage prevention structure 1 is described.

  The water channel A is used, for example, when flowing domestic wastewater in addition to agricultural water and industrial water, and is configured by arranging a plurality of concrete water channel components B1 and B2 in a predetermined direction. In this figure, two waterway constituent members B1 and B2 (first member, second member) are shown, and other waterway constituent members are omitted.

  Each of the waterway constituent members B1 and B2 is the same and has a channel shape having a substantially U-shaped cross section that opens upward. The waterway constituent members B1 and B2 may be precast products that are preliminarily molded in a factory and conveyed to the site, or may be on-site products that are molded by stamping concrete into a formwork on site. . Further, the waterway constituent members B1 and B2 may be linear or may be curved.

  The size of the water channel component member B1 varies depending on the use of the water channel A, etc., for example, the length is about 0.5m to 20m, the width is about 0.3m to 10m, and the height is about 0.3m to 3m. .

  A stepped portion Ba is formed on the inner surface of the end portion in the longitudinal direction of the water channel component member B1. At the end in the longitudinal direction of the water channel component member B2, a fitting portion Bb formed so as to fit into the stepped portion Ba of the adjacent water channel component member B1 is formed so as to protrude. A joint C is formed between the water channel component member B1 and the water channel component member B2. And the sealing material 10 is arrange | positioned between the inner surface of level | step-difference part Ba of waterway structural member B1, and the outer surface of fitting part Bb of waterway structural member B2, and prevents the leak from the joint C. . The sealing material 10 constitutes a joint water leakage prevention structure 1 (shown only in FIG. 2).

  Next, the structure of the sealing material 10 will be described. As shown in FIG. 1, a sealing material 10 is fixed to a rubber (viscoelastic body) 11 formed in a long cylindrical shape and an inner peripheral surface of the rubber 11 so as to cover the inner peripheral surface. And a film material 12. The circumferential length and thickness of the sealing material 10 may be set to arbitrary values depending on the size and structure of the water channel A using the sealing material 10. For example, the circumferential length is 10 mm to 1000 mm, and the thickness is 0.5 mm. It can be set in the range of -10 mm.

  The thickness of the rubber 11 is set substantially uniformly in the circumferential direction of the rubber 11 and is also set substantially uniformly from one end to the other end in the longitudinal direction. The thickness of the rubber 11 can be partially reduced.

  The rubber 11 is composed of a rubber composition in which various compounding agents are blended with raw material rubber. In this embodiment, non-vulcanized butyl rubber (IIR) is used as the raw rubber. As the butyl rubber, for example, recycled butyl rubber obtained by regenerating an inner tube of a waste tire is particularly preferable.

  The raw rubbers include natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), polybutadiene rubber (BR), styrene-butazine rubber (SBR), chloroprene rubber (CR), nitrile rubber (NBR), Examples include acrylic rubber (ACM, ANM), urethane rubber (U), and the like. The raw rubber may be composed of a single species, or may be composed of a blend of a plurality of species. The raw rubber is not limited to the above, and may be any rubber that has a property of ensuring the sealing property of the joint C without allowing water to pass therethrough.

  Examples of the compounding agent include, but are not limited to, a reinforcing material such as carbon black, an anti-aging agent, a softening agent, and a viscosity imparting agent.

  In this embodiment, the physical properties of the rubber 11 are such that the tensile strength measured based on JIS K6251 is 0.3 MPa or more, and the elongation is 400% or more. The physical properties of the rubber 11 can be arbitrarily adjusted by the compounding agent.

  The outer peripheral surface of the rubber 11 has adhesiveness to the surfaces of the water channel constituent members B1 and B2. The adhesiveness of the outer peripheral surface of the rubber 11 can be imparted with a known adhesive or the like. Further, the inner peripheral surface of the rubber 11 has adhesiveness to the film material 12. Furthermore, the rubber 11 is easily elastically deformed so as to follow the inner surface shape of the stepped portion Ba of the water channel component member B1 and the outer surface shape of the fitting portion Bb of the water channel component member B2.

  The film material 12 is made of a resin material and is formed in a cylindrical shape like the rubber 11. The entire outer peripheral surface of the film material 12 is fixed to the inner peripheral surface of the rubber 11 by the adhesiveness of the rubber 11. Thereby, even if external force acts on the sealing material 10 from various directions, the film material 12 is hardly displaced with respect to the rubber 11.

  The film material 12 may be fixed to the inner peripheral surface of the rubber 11 with an adhesive or the like. Further, since it is sufficient that the film material 12 does not shift with respect to the rubber 11, a part of the film material 12 may not be fixed to the rubber 11.

  The thickness of the film material 12 is set to about 10 μm to 1000 μm. The resin material constituting the film material 12 is, for example, a polyolefin resin such as a polyethylene resin or a polypropylene resin, a polyester resin such as a polybutylene terephthalate resin or a polyethylene terephthalate resin, an acetate resin, an acrylonitrile / butadiene / styrene (ABS) resin, Examples include polystyrene resin, vinyl chloride resin, polyimide resin, polyamide resin, and the like. The resin film 12 may be formed of a single material, or may be formed of a plurality of materials. Among these, the resin film 12 is preferably a polyolefin resin such as polyethylene resin or polypropylene resin. The resin film 12 may be composed of a single layer or may be composed of a multi-layer laminate. In addition to the resin, the film material 12 may be formed of, for example, a thin metal material made of aluminum or the like, or a cloth.

  When the inner peripheral surface of the film material 12 is in a state of being in pressure contact with each other (shown in FIGS. 3 and 4), the direction (shown in the vertical direction in FIGS. 3 and 4) intersects the direction (the vertical direction in FIGS. 3 and the left-right direction of FIG. 4). The slipperiness is obtained by subjecting the film material 12 to a surface treatment, and also includes what the film material 12 itself has. The surface treatment may be any treatment for imparting lubricity, and examples thereof include attaching a friction reducing agent such as oil and powder such as talc. Further, the film material 12 may be subjected to silicone coating or fluorine coating.

  When the sealing material 10 is in use, the details will be described later. As described above, the seal material 10 is sandwiched between the water channel component member B1 and the water channel component member B2 and is crushed in the thickness direction. In this case, as shown in FIG. 4, the inner peripheral surfaces of the film material 12 are pressed against each other in the thickness direction to form pressure-contact surfaces 12 a and 12 b. The slipperiness is possessed by the entire inner peripheral surface of the film material 12, and the pressure contact surfaces 12 a and 12 b do not adhere to each other in a state of receiving the pressure contact force as described above, for example, the pressure contact surface 12 a in the seal material 10. When a force is applied to the side portion in the left-right direction in FIG. 4, the pressure contact surface 12a can slide with respect to the pressure contact surface 12b. The magnitude of the force in the left-right direction is the force when the water channel component B1 is displaced in the direction in which the water channel A extends with respect to the water channel component B2, and the water channel component B2 extends in the water channel A with respect to the water channel component B1. This is the force when moving in the direction. Factors of displacement include ground subsidence, vehicle running vibration, expansion and contraction due to changes in ambient temperature, and the like.

  As a manufacturing point of the sealing material 10, for example, an extrusion molding method can be used. That is, when the rubber 11 is molded, the extrusion mold may be configured so that the inner peripheral surface thereof is covered with the film material 12. Thereby, the sealing material 10 which consists of the rubber | gum 11 and the film material 12 can be obtained easily.

  Next, the case where the water channel A is constructed | assembled using the said sealing material 10 is demonstrated. First, the water channel component member B1 is installed at a predetermined position.

  Thereafter, the sealing material 10 is attached to the inner peripheral surface of the stepped portion Ba of the water channel component member B1. At this time, since the outer peripheral surface of the rubber 11 of the sealing material 10 is sticky, the sealing material 10 is held by the water channel constituent member B1 only by pressing the sealing material 10 against the inner peripheral surface of the stepped portion Ba.

  Thereafter, the water channel component B2 is installed. At this time, the fitting portion Bb of the water channel component member B2 is fitted into the stepped portion Ba of the water channel component member B1, but the fitting portion Bb moves the seal material 10 of the stepped portion Ba in the direction in which the water channel component member B2 is moved. The direction is pressed almost perpendicularly to the inner surface. In this way, the joint water leakage prevention structure 1 shown in FIG. 2 is obtained.

  And the sealing material 10 is arrange | positioned between level | step-difference part Ba of water-channel structural member B1, and fitting part Bb of water-channel structural member B2, and is pinched | interposed by level | step-difference part Ba and fitting part Bb, and water-channel structural member It will be in the state which seals between B1 and waterway component B2. At this time, the sealing material 10 is crushed in the thickness direction by the stepped portion Ba and the fitting portion Bb, and the rubber 11 is elastically deformed along the inner surface of the stepped portion Ba and the inner surface of the fitting portion Bb. Further, the outer peripheral surface of the rubber 11 adheres to the inner surface of the stepped portion Ba and the inner surface of the fitting portion Bb. By these things, between water channel component member B1 and water channel component member B2 is sealed reliably, and a water leak is prevented.

  After the water channel A is constructed, for example, land subsidence or vehicle running vibration may occur around the water channel A, and expansion and contraction of the water channel components B1 and B2 may occur due to changes in the surrounding temperature. Thereby, for example, the water channel component member B1 may be displaced with respect to the water channel component member B2. Although the direction of displacement is various, the movement of the sealing material 10 will be described assuming that the water channel component member B1 is displaced in the direction in which the water channel A extends (the direction indicated by the arrow in FIG. 5). For convenience, it is assumed that the water channel component B2 is stationary.

  Since the sealing material 10 is in a sealed state, the inner peripheral surface of the film material 12 is in pressure contact, and there are pressure contact surfaces 12a and 12b shown in FIG. Due to the displacement of the water channel component member B1, the portion of the rubber 11 that adheres to the stepped portion Ba of the water channel component member B1 moves to the right in FIG. 5, and accordingly, the film material 12 shown in FIG. The pressure contact surface 12a slides to the right with respect to the pressure contact surface 12b. Thereby, the sealing material 10 rolls to the right side.

  At this time, a part of the rubber 11 adhered to the inner peripheral surface of the stepped portion Ba shown in FIG. 5 remains adhered to the stepped portion Ba, and the rubber adhered to the outer peripheral surface of the fitting portion Bb. Although a part of 11 remains adhering to the fitting part Bb, the remaining amount is a small amount as compared with the entire amount of the rubber 11, so that the sealing performance is not deteriorated.

  By such rolling of the sealing material 10, the sealing material 10 moves following the displacement of the water channel component member B1. Therefore, even if the displacement of the water channel constituent member B1 is large, the sealing material 10 does not generate a large force that causes the sealing material 10 to break, so that the sealing material 10 is prevented from being broken and the sealing performance is obtained. .

  In addition, when the water channel component member B2 is displaced in the direction in which the water channel A extends with respect to the water channel component member B1, the sealing material 10 similarly rolls.

  Next, a case where the displacement direction of the water channel component member B1 is a direction in which the stepped portion Ba is separated from the fitting portion Bb (a direction indicated by an arrow in the drawing) will be described with reference to FIG. In this case, since the outer peripheral surface of the rubber 11 is adhered to the fitting portion Bb and the stepped portion Ba, the sealing material 10 is pulled in the displacement direction of the water channel component member B1 so that the film material 12 becomes cylindrical. To follow the displacement of the water channel component B1. By this deformation, the sealing performance between the water channel component member B1 and the water channel component member B2 is ensured.

  As described above, according to the first embodiment, the film material 12 is fixed to the inner peripheral surface of the cylindrical rubber 11, and the pressure contact surfaces 12a and 12b of the film material 12 are slid when in the sealed state. Since the rubber 11 and the film material 12 are caused to roll by this, when the water channel component member B1 or the water channel component member B2 is relatively displaced in a direction in which the seal material 10 is sheared, the seal material 10 is moved in that direction. It can roll to follow the displacement. Thereby, the tear of the sealing material 10 can be suppressed and a sealing performance can be obtained over a long period of time.

  Moreover, since the outer peripheral surface of the rubber 11 of the sealing material 10 has adhesiveness, the rubber 11 can be adhered to the water channel constituent member B1 and the water channel constituent member B2 to further improve the sealing performance.

  Moreover, in this Embodiment 1, since the sealing material 10 can be deformed so as to swell, the sealing performance is ensured even when the displacement direction of the water channel component member B1 is the direction in which the stepped portion Ba is separated from the fitting portion Bb. it can.

(Embodiment 2)
FIG. 7 shows a sealing material 10 according to Embodiment 2 of the present invention. The sealing material 10 of the second embodiment is different from that of the first embodiment only in the structure of the rubber 11 and the film material 12 and the use state is the same. Therefore, different parts will be described in detail below.

  That is, the rubber 11 of the sealing material 10 of the second embodiment is provided with a rubber-side defect portion (viscoelastic body-side defect portion) 11a that is partially lost. The formation position of the rubber-side defect portion 11a is set so as to be located in the middle portion in the longitudinal direction of the sealing material 10 and in the middle portion in the width direction of the sealing material 10 when the sealing state shown in FIG. . Further, the size of the rubber defect portion 11 a is set so that the rubber defect portion 11 a does not reach the end portion in the width direction of the sealing material 10 when being in a sealed state. The shape of the rubber defect portion 11a may be circular or rectangular, and the shape is not particularly limited.

  A portion corresponding to the rubber-side defect portion 11 a in the film material 12 is provided with a film material-side defect portion 12 c formed by losing the film material 12. The shape of the film side defect 12c is set substantially the same as that of the rubber defect 11a.

  In the second embodiment, when the water channel component B1 is displaced in the direction in which the water channel A extends (the direction indicated by the arrow in FIG. 9), as described in the first embodiment, the sealing material 10 rolls. The sealing material 10 moves following the displacement of the water channel component member B1. Therefore, even if the displacement of the water channel constituent member B1 is large, the sealing material 10 does not generate a large force that causes the sealing material 10 to break, so that the sealing material 10 is prevented from being broken and the sealing performance is obtained. .

  As described above, according to the second embodiment, as in the first embodiment, the rubber 11 and the film material 12 are caused to roll when in the sealed state, so that the sealing material 10 is prevented from being broken. And sealability can be obtained over a long period of time.

  Further, by providing the rubber-side missing portion 11a in a part of the rubber 11, the amount of rubber raw material used can be suppressed and the cost can be reduced.

  In addition, since the rubber defect portion 11a and the film material side defect portion 12c are formed, it is possible to introduce air into the sealing material 10 through the rubber defect portion 11a and the film material side defect portion 12c. It has become. At this time, it is preferable that the portion of the outer peripheral surface of the rubber 11 that is in contact with the fitting portion Bb is not tacky. Thereby, for example, as shown in FIG. 10, when the displacement direction of the water channel component member B1 is the direction in which the stepped portion Ba is separated from the fitting portion Bb (the direction indicated by the arrow in the drawing), the sealing material 10 The air is introduced into the inside of the sealing member 10 so that the sealing material 10 is easily expanded. Thereby, the sealing performance is further improved.

  The sealing material 10 may be provided with only the rubber-side defect portion 11a and the film material-side defect portion 12c may be omitted. Further, the rubber-side defect portion 11 a and the film material-side defect portion 12 c may be provided at a plurality of locations, or may be formed in a slit shape extending in the longitudinal direction of the seal material 10.

(Embodiment 3)
FIG. 11 shows a usage state of the sealing material 10 according to the third embodiment. The sealing material 10 of the third embodiment is different from that of the first embodiment only in that the entire outer peripheral surface of the rubber 11 has non-adhesiveness compared to that of the first embodiment, and the use state is the same. Therefore, different parts will be described in detail below.

  Non-adhesion treatment is performed on the outer peripheral surface of the rubber 11 of the third embodiment so as not to adhere to the water channel constituent members B1 and B2. Non-adhesive treatment includes, for example, attaching a lubricant such as oil or an anti-adhesion powder such as talc, but is not limited thereto.

  When the sealing material 10 is in a sealed state, if the water channel component member B1 is displaced in the direction in which the water channel A extends (the direction indicated by the arrow in FIG. 11), it rolls in the same manner as in the first embodiment. At this time, since the rubber 11 is not adhered to the stepped portion Ba of the water channel component member B1 and the fitting portion Bb of the water channel component member B2, the rubber 11 is easy to roll like an endless belt and seals against the displacement of the water channel component member B1. The followability of 10 is improved.

  Further, since the rubber 11 is not adhered to the stepped portion Ba and the fitting portion Bb, a part of the rubber 11 does not remain in the stepped portion Ba and the fitting portion Bb, and the high sealing performance by the rubber 11 is achieved. Can be maintained.

  As described above, according to the third embodiment, as in the first embodiment, the rubber 11 and the film material 12 are caused to roll when in the sealed state, so that the sealing material 10 is prevented from being broken. And sealability can be obtained over a long period of time.

  In the first to third embodiments, the case where the sealing material 10 is used in a flat plate shape without being folded has been described. However, the invention is not limited thereto, and the rubber 11 and the film material are used as in Modification 1 shown in FIG. You may comprise so that it may have the thickness for 3 sheets of the sealing material 10 by folding 12 together. Thereby, even when the dimension between level difference part Ba of channel constituent member B1 and fitting part Bb of channel constituent member B2 is long, it can respond easily. In addition, by folding the sealing material 10, even if the waterway constituent member is greatly displaced in the thickness direction of the sealing material 10, a large deformation amount of the sealing material 10 can be ensured so as to correspond to the displacement amount, and the sealing performance is improved. It can be secured.

  Further, when the sealing material 10 is folded, both sides in the width direction may be folded back as in Modification 2 shown in FIG. In the second modification, the thickness of the two sealing materials 10 is provided. Moreover, although not shown in figure, you may fold so that it may have a thickness more than four sheets of the sealing material 10. FIG.

  Moreover, the cross-sectional shape of the sealing material 10 can be made into various shapes, for example, you may make it trapezoid like the modification 3 shown in FIG.

  Moreover, you may provide a non-adhesion part only in one part among the outer peripheral surfaces of the rubber | gum 11.

  Further, the film material 12 may be folded in advance in the width direction of one film material 12 as shown in Modification 4 shown in FIG. As in Example 5, one film material 12 may be folded.

  Further, instead of the rubber 11, a resin having viscoelasticity or the like molded into a cylindrical shape may be used.

  Moreover, the said sealing material 10 can also be used also for what is called a butting joint (not shown) which abutted the end surfaces of adjacent waterway structural member B1, B2.

  Moreover, the sealing material 10 can be widely used when it is necessary to seal not only the joint C of the water channel A but also between two members.

  As described above, the present invention can be applied to a joint of a water channel, for example.

1 Joint leakage prevention structure 10 Sealing material 11 Rubber (viscoelastic body)
11a Rubber side defect part (viscoelastic body side defect part)
12 Film material 12a Pressure contact surface 12b Pressure contact surface 12c Film material side missing part B1 Waterway component (first member)
B2 Waterway component (second member)

Claims (7)

In the sealing material that seals between the first member and the second member,
A viscoelastic body formed in a cylindrical shape;
A film material fixed so as to cover the inner peripheral surface with respect to the inner peripheral surface of the viscoelastic body,
When the film member is in a state of being sealed between the first and second members and sandwiched between the two members, the pressure contact surfaces that are in pressure contact with each other among the film materials are: The viscoelastic body and the film material have slipperiness that allows slipping in a direction intersecting the direction of receiving the pressure contact force, and slide the pressure contact surface of the film material by relative displacement of the first and second members. Is configured to roll between the first and second members. The sealing material according to claim 1,
A sealing material, wherein the viscoelastic body is provided with a viscoelastic body-side deficient portion formed by missing a part of the viscoelastic body. The sealing material according to claim 2,
The sealing material characterized by the film material side defect | deletion part formed by defect | deleting this film material being provided in the part corresponding to the viscoelastic body side defect | deletion part in a film material. In the sealing material according to any one of claims 1 to 3,
The sealing material, wherein the outer peripheral surface of the viscoelastic body has adhesiveness to adhere to at least one of the first and second members when in a sealed state. In the sealing material according to any one of claims 1 to 3,
At least a part of the outer peripheral surface of the viscoelastic body has non-adhesiveness to the first and second members. In the sealing material according to any one of claims 1 to 4,
A sealing material, wherein the viscoelastic body and the film material are folded so as to overlap in the thickness direction. In the joint water leakage prevention structure configured to prevent water leakage from the joints of the first member and the second member arranged to form a water channel using a sealing material,
The sealing material includes a viscoelastic body formed in a cylindrical shape, and a film material fixed so as to cover the inner peripheral surface with respect to the inner peripheral surface of the viscoelastic body. When the two members are in a state of being sandwiched between the two members and being sealed between the two members, at least the pressure contact surfaces that are in pressure contact with each other in the film material are subjected to a pressure contact force. Configured to have slipperiness that allows slippage in the direction intersecting with
When the sealing material is in a state of sealing between the first and second members, the sealing material is slid by sliding the pressure contact surface of the film material by relative displacement of the first and second members. A joint water leakage preventing structure configured to roll between the first and second members.

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