JP5493233B2 - Sealing device - Google Patents

Description

  The present invention relates to a sealing device that is used by being inserted between two opposing surfaces in order to seal between the two opposing surfaces.

  Conventionally, in order to seal between two opposing surfaces, a sealing device is known that is inserted between the two surfaces and used. For example, in order to seal a gap between adjacent assembly parts such as a stationary blade shroud and an end wall of a gas turbine, a technique using an elongated plate-like sealing device is known (Patent Document 1, Patent Document). (See 2nd grade).

  The sealing device according to the prior art is used by being inserted into opposing grooves formed on the opposing surfaces, and contacts the mounting wall surface and the sealing wall surface of the sealing device inside the opposing groove. Thereby, one surface of the sealing device is pressed against the seal wall surface of the facing groove, and the space between the facing surfaces can be sealed. Moreover, the sealing device to be inserted has flexibility so that it can be deformed following the opposing groove.

JP 2003-097220 A JP 2007-218375 A

  However, when the sealing device according to the prior art is inserted into the facing groove, the sealing device is designed to come into contact with both the mounting wall surface and the sealing wall surface of the facing groove so that the sealing device is pressed toward the sealing surface of the facing groove. Therefore, it is difficult to smoothly insert into the facing groove, which has a problem in assembling. Further, the sealing device according to the prior art may be caught on the wall surface of the opposing groove when inserted into the opposing groove or pulled out from the opposing groove, and the wall surface of the opposing groove may be worn or damaged, or the sealing device may be worn or damaged. there were.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a sealing device that is inserted between two surfaces in order to seal between the two surfaces facing each other. Thus, it is an object to provide a sealing device that prevents a member to be inserted and the sealing device itself from being worn and damaged during assembly and disassembly and can be smoothly attached and detached.

In order to solve the above-mentioned problem, a sealing device according to the present invention has a main body seal surface and a main body back surface opposite to the main body seal surface, and has an elongated plate-like seal main body portion;
The seal body having a corrugated shape that intermittently contacts the back surface of the main body, connected to one end of the seal main body, and an end opposite to the connection end A free end portion that can move relative to the spring portion, and
The free end portion of the spring portion is formed with a first engagement portion that engages with a spring holding means and extends the spring portion longer than the free length of the spring portion.

  The sealing device according to the present invention has a corrugated spring portion that intermittently contacts the back surface of the main body of the seal main body portion, and the spring portion has a main body sealing surface when the sealing device is assembled in the facing groove. A force that pushes toward the opposite groove is generated. The free end portion of the spring portion is formed with a first engagement portion that engages with the spring holding means and extends the spring portion longer than the free length, and the first engagement portion is engaged with the spring holding means. Thus, the thickness of the sealing device can be suppressed. Therefore, the sealing device according to the present invention can be smoothly inserted into the opposing groove by inserting the first engaging portion into the opposing groove in a state of being engaged with the spring holding means. After the seal device is inserted into the opposing groove, the spring part generates a force that presses the main body seal surface of the seal main body part toward the opposing groove by releasing the engagement between the spring holding means and the first engaging part. .

  Even when the sealing device is pulled out from the facing groove, the sealing device can be pulled out smoothly by engaging the first engaging portion with the spring holding means. Further, the sealing device according to the present invention can prevent the inserted member and the sealing device itself from being worn and damaged during assembly and disassembly.

Further, for example, in the sealing device according to the present invention, a second engagement portion is formed at the connection end portion of the spring portion,
The spring holding means is formed at a connection portion extending in the longitudinal direction of the seal main body portion and at both ends of the connection portion, and protrudes from the connection portion in the thickness direction of the seal main body portion. You may have the 1st projection part which detachably engages with a joint part, and the 2nd projection part which detachably engages with the said 2nd engagement part.

  In the sealing device including such a spring portion and the spring holding means, the spring holding means can engage both the free end portion and the connection end portion of the spring portion, and the spring holding means can support the restoring force of the spring. . Therefore, such a sealing device prevents the restoring force of the spring from being transmitted to the seal body through the connection end when the spring is extended and attached, and suppresses deformation of the seal body during attachment / detachment. In addition, smoother attachment / detachment can be realized. In addition, such a sealing device can select a more flexible material and structure as the seal body.

  The one end of the seal body is formed with a second through-hole through which the second protrusion is inserted, and the other end of the seal body is the first protrusion. A first through hole may be formed through which is inserted.

  Such a sealing device is easy to assemble because the spring holding means can be attached and detached not only from the spring part side but also from the seal surface side of the seal body part. In addition, when attaching and detaching the sealing device, the spring holding means can be brought into close contact with the plate-like seal body instead of the corrugated spring portion, so that the entire sealing device including the spring holding means can be made compact. In this respect, assembly is easy.

  For example, the spring holding means may be a protrusion formed on the back surface of the main body. Since such a sealing device does not require a member to be removed from the sealing device except when the sealing device is attached or detached, the overall configuration is simple.

In addition, for example, the spring portion alternately has a valley portion that contacts the back surface of the main body and a peak portion that maximizes the gap between the back surface of the main body from the connection end portion toward the free end portion. And
The ridges may be formed with ridge protrusions projecting on the opposite side of the back of the main body at both ends of the seal main body in the short direction.

  In such a sealing device, even when the facing groove is deformed due to thermal stress or the like, the contact between the peak protrusion and the facing groove is well maintained, so that better sealing performance can be exhibited. Moreover, since the peak protrusion protects other portions of the spring portion from abrasion with the opposing groove, such a sealing device has excellent durability.

  Further, the shape of the peak portion is not particularly limited, but the peak portion on which the peak protrusion is formed is such that both ends in the short direction of the member constituting the peak portion are opposite to the back surface of the main body. You may have the shape curled toward. In addition, the peak protrusion may be produced by bending both ends of the member constituting the peak in the short direction.

  The spring portion having such a shape is excellent in durability and easy to manufacture because the protrusion on the peak portion is formed without joining another member.

FIG. 1 is a perspective view of a sealing device according to an embodiment of the present invention. 2 (A) and 2 (B) are perspective views showing a state when the seal device shown in FIG. 1 is inserted and removed. FIG. 3A and FIG. 3B are conceptual diagrams showing a difference in the shape of the spring portion depending on the presence or absence of the spring holding member. 4A to 4C are conceptual diagrams illustrating a method for inserting the sealing device. FIG. 5 is a cross-sectional view of the sealing device inserted in the facing groove. 6A is a perspective view of a sealing device according to the second embodiment of the present invention, and FIG. 6B is a perspective view showing another state of the sealing device shown in FIG. 6A. . FIG. 7 is an enlarged view of a peak portion in a spring portion included in the sealing device shown in FIG. FIG. 8 is a cross-sectional view of the sealing device inserted in the facing groove. FIG. 9A is a perspective view of a sealing device according to a third embodiment of the present invention, and FIG. 9B is a perspective view showing another state of the sealing device shown in FIG. 9A. .

First Embodiment FIG. 1 is a perspective view of a sealing device 10 according to a first embodiment of the present invention. The sealing device 10 is used between gas turbine assembly parts, but the application place of the sealing device according to the present invention is not particularly limited. The seal device 10 includes a seal main body portion 20, a spring portion 30, and a spring holder 40. The seal body 20 and the spring 30 are connected on the second end 28 side of the seal body 20. On the other hand, the spring holder 40 can be freely attached to and detached from the seal body 20 and the spring 30.

  The seal body 20 has an elongated plate shape. The seal body 20 includes a body seal surface 22 (see FIG. 2A) and a body back surface 24 that is the opposite surface of the body seal surface 22. A spring portion 30 having a wave shape is disposed on the main body back surface 24. As shown in FIGS. 1 to 2, the seal main body 20 is made slightly longer than the stretched spring portion 30, and a portion of the main body rear surface 24 where the spring portion 30 is not disposed is cured. A tool engaging hole 25 is formed. An attaching jig is engaged with the jig engaging hole 25 when the sealing device 10 is attached to or detached from the facing groove between the assembly components of the gas turbine. However, the engagement structure with the mounting jig in the sealing device 10 is not limited to the jig engaging hole 25 as shown in FIG. 1, and the length of the seal body 20 is extended. It may be equivalent to the spring part 30.

  The spring portion 30 has a corrugated shape, and intermittently contacts the main body back surface 24 of the seal main body portion 20 (see FIG. 3 and the like). The spring portion 30 is made of an elastic material such as metal. As shown in FIG. 5, the main body seal surface 22 of the seal main body portion 20 is formed by the restoring force (elastic force) of the spring portion 30. It is pressed against the first seal wall surface 54a and the second seal wall surface 54b. The seal body 20 is also made of a flexible metal material or the like. Although the metal material which comprises the spring part 30 and the seal | sticker main-body part 20 is not specifically limited, For example, Ni, Co type heat-resistant alloy etc. are mentioned. The sealing action of the sealing device 10 will be described later.

  As shown in FIG. 1, the connection end 38 that is one end of the spring portion 30 is connected to the second end 28 that is one end of the seal body 20. The spring part 30 and the seal body part 20 may be connected by brazing, welding, or the like, or may be made from a single plate material by performing machining such as bending.

  The spring portion 30 is an end portion on the opposite side of the connection end portion 38, and has a free end portion 36 that can move relative to the seal main body portion 20. As shown in FIG. 3, the free end portion 36 of the spring portion 30 applies a force for extending the spring portion 30 or releases the force for extending the spring portion 30 with respect to the seal body portion 20. Relative movement is possible in the longitudinal direction.

  As shown in FIG. 1, a first engagement portion 36 a that engages with the first protrusion 46 of the spring holder 40 is formed at the free end portion 36 of the spring portion 30. Further, a second engagement portion 38 a that engages with the second protrusion 48 of the spring holder 40 is formed at the connection end portion 38 of the spring portion 30. In the present embodiment, the first engaging portion 36 a and the second engaging portion 38 a are rectangular through holes, and the shapes of these engaging portions 36 a and 38 a are the protrusions 46 and 48 of the spring holder 40. If it is the shape which can be detachably engaged, it will not specifically limit.

  The spring holder 40 is a member for extending the length of the spring portion 30 longer than the free length of the spring portion 30 when the sealing device 10 is attached to or detached from the facing groove between the assembly components of the gas turbine. The spring holder 40 is formed at a connection part 42 extending in the longitudinal direction of the seal body 20 and at both ends of the connection part 42, and protrudes in the thickness direction of the seal body 20 from the connection part 42. A protrusion 46 and a second protrusion 48 are provided. The spring holder 40 according to the present embodiment is a rod having a substantially rectangular cross-section and is made of metal or resin, but the cross-sectional shape and material of the spring holder 40 are not particularly limited.

  2 (A) and 2 (B) are perspective views showing the sealing device 10 when being attached to and detached from opposing grooves or the like between assembly parts of the gas turbine. 2A is a view of the sealing device 10 observed from the main body sealing surface 22 side of the seal main body portion 20, and FIG. 2B shows the sealing device 10 similar to that in FIG. It is the figure observed from the main body back surface 24 side of the part 20. FIG.

  As shown in FIG. 2A, the spring holder 40 is attached to the seal main body 20 and the spring 30 from the main body seal surface 22 side. A first through hole 26 a through which the first protrusion 46 of the spring holder 40 is inserted is formed in the first end portion 26 of the seal body 20. The first protrusion 46 passes through the first through hole 26a, protrudes from the main body seal surface 22 to the main body back surface 24, and engages with the first engagement portion 36a of the spring portion 30 as shown in FIG. . In contrast, as shown in FIG. 2A, the second end 28 of the seal body 20 is formed with a second through hole 28a through which the second protrusion 48 of the spring holder 40 is inserted. Similarly to the first protrusion 46, the second protrusion 48 passes through the second through hole 28 a and engages with the second engagement part 38 a of the spring part 30.

FIG. 3A shows the shape of the spring portion 30 in a state where the spring holder 40 is detached from the seal main body portion 20 and the spring portion 30. When the spring holder 40 is not attached, the length L ₁ of the spring portion 30 is equal to the free length of the spring portion 30. At this time, the thickness W ₁ of the sealing device 10 excluding the spring holder 40 (the length from the main body seal surface 22 to the top of the spring portion 30) is the width W ₃ (seal of the opposing groove 52 into which the sealing device 10 is inserted. It is designed to be larger than the distance from the wall surfaces 54a and 54b to the mounting wall surfaces 56a and 56b (see FIG. 5).

FIG. 3B shows the shape of the spring portion 30 in a state where the spring holder 40 is attached to the seal main body portion 20 and the spring portion 30. If the spring retainer 40 is mounted, the length L ₂ of the spring portion 30 is extended in the longitudinal direction by a spring retainer 40, is longer than a free length L _{1 (FIG.} 3 (A)) . At this time, the thickness W ₂ (the length from the main body seal surface 22 to the apex of the spring portion 30) of the sealing device 10 excluding the spring holder 40 is smaller than the thickness W _{1 of the} seal member shown in FIG. . The thickness W ₂ of the sealing device 10 in a state of mounting the spring retainer 40 is preferably designed to be smaller than the width W ₃ of the opposite groove 52 sealing device 10 is inserted.

  4A to 4C are conceptual diagrams illustrating a method for inserting the sealing device 10. As shown in FIG. 4A, the sealing device 10 is used by being inserted between a first part 50a and a second part 50b, which are two adjacent parts in a gas turbine. The first component 50a has a first facing surface 51a that is a surface facing the second component 50b, and a first groove 52a is formed in the first facing surface 51a. The second component 50b has a second facing surface 51b that is a surface facing the first component 50a, and a second groove 52b is formed on the second facing surface 51b so as to face the first groove 52a. Has been. The sealing device 10 is inserted into the facing groove 52 constituted by the first groove 52a and the second groove 52b.

As shown in FIG. 4B, the sealing device 10 is inserted along the longitudinal direction of the facing groove 52 with the spring holder 40 attached to the seal body 20 and the spring 30. As shown in FIG. 3 (B), the thickness W ₂ of the sealing device 10 is to be kept small by the spring retainer 40 can be inserted sealing device 10 smoothly to the opposing grooves 52. At this time, since the spring holder 40 is located between the first facing surface 51a and the second facing surface 51b, it does not get in the way during insertion.

  Further, after the sealing device 10 is inserted to a predetermined position, the spring holder 40 is removed (FIG. 4C). By removing the spring holder 40, the engagement between the first engaging portion 36 a of the spring portion 30 and the first protrusion 46 of the spring holder 40 is released, and the spring portion 30 extends in the longitudinal direction of the seal body portion 20. Shrink along. Thereby, the thickness of the sealing device 10 is increased, and the spring portion 30 is in a state where it can exert a force for pressing the seal main body portion 20 against the wall surface of the facing groove 52 (see FIG. 3). As described above, the attachment of the sealing device 10 is completed. When removing the sealing device 10, the spring holder 40 may be attached again and then the sealing device 10 may be pulled out from the facing groove 52, or may be removed without attaching the spring holder 40. It is.

  FIG. 5 is a cross-sectional view of the sealing device 10 inserted into the facing groove 52. The facing groove 52 includes a first groove 52a of the first component 50a and a second groove 52b of the second component 50b. The first groove 52a is in contact with the main body seal surface 22 of the seal main body portion 20 to form a seal surface, and the first attachment is opposed to the first seal wall surface 54a and in contact with the spring portion 30. It has a wall surface 56a and a first connection wall surface 58a that connects the first seal wall surface 54a and the first mounting wall surface 56a. The second groove 52b has a shape symmetrical to the first groove 52a, and corresponds to each surface of the first seal wall surface 54a, the first mounting wall surface 56a, and the first connection wall surface 58a in the first groove 52a. It has a seal wall surface 54b, a second mounting wall surface 56b, and a second connection wall surface 58b.

  The sealing device 10 is disposed inside the facing groove 52 so as to straddle the first groove 52a and the second groove 52b. The spring portion 30 of the sealing device 10 contacts the mounting wall surfaces 56a and 56b of the facing groove 52 and the main body rear surface 24 of the sealing body portion 20, and the body sealing surface 22 of the sealing body portion 20 is connected to the sealing wall surfaces 54a and 54a of the facing groove 52. The force which pushes toward 54b is generate | occur | produced. Thereby, even when the components 50a and 50b are deformed due to thermal stress or the like, the contact between the main body seal surface 22 and the seal wall surfaces 54a and 54b is maintained, and the seal device 10 exhibits a suitable sealing performance. In addition, seal surface protrusions 23a and 23b that protrude toward the seal wall surfaces 54a and 54b are formed at both ends of the main body seal surface 22 in the short direction. As a result, the sealing device 10 can prevent the main body seal surface even when the positions of the first groove 52a and the second groove 52b constituting the facing groove 52 are shifted in the thickness direction of the seal main body portion 20 due to thermal stress or the like. 22 and the seal wall surfaces 54a and 54b are kept in contact with each other, and suitable sealing performance is achieved.

As described above, in the sealing device 10 according to the present embodiment, the first engaging portion 36 a formed on the free end portion 36 of the spring portion 30 is engaged with the first projecting portion 46 of the spring holder 40. by inserting the opposing grooves 52 in a state, it is possible to reduce the thickness W ₂ of the sealing device 10 during insertion, it is smoothly inserted into the opposing grooves 52 (FIGS. 3 and 4). Further, the sealing device 10 according to the present embodiment can prevent the wall surface of the facing groove 52 and the sealing device 10 itself from being worn and damaged during assembly and disassembly.

  Further, in the sealing device 10, in addition to the first protrusion 46, the second protrusion 48 of the spring holder 40 engages with the second engagement portion 38 a formed at the connection end 38 of the spring portion 30. (FIG. 2). Thereby, in the sealing device 10, the spring holder 40 can be engaged with both the free end portion 36 and the connection end portion 38 of the spring portion 30 and can support the restoring force of the extended spring portion 30. . Therefore, the sealing device 10 prevents the restoring force of the spring part 30 from being transmitted to the seal body 20 through the connection end 38 in a state where the spring part 30 is extended, and the deformation of the seal body 20 at the time of attachment / detachment. It is possible to achieve a smoother attachment / detachment. Moreover, such a sealing device 10 can select a material and structure with higher flexibility as the seal main body 20 or use a material having a larger restoring force as the spring portion 30. It has suitable sealing performance.

  Further, in the sealing device 10, the spring holder 40 can be attached / detached not only from the spring part 30 side but also from the main body seal surface 22 side of the seal main body part 20, so that the spring holder 40 is attached to / detached from the spring part 30. Easy to assemble. Further, since the spring holder 40 can be brought into close contact with the plate-like seal main body 20 instead of the wave-shaped spring portion 30 when the seal device 10 is attached and detached, the entire seal device 10 including the spring holder 40 is arranged. It is possible to reduce the size.

Second Embodiment FIGS. 6A and 6B are perspective views of a sealing device 12 according to a second embodiment of the present invention. The seal device 12 includes a seal main body portion 20, a spring portion 60, and a spring holder 40, and is the same as the seal device 10 according to the first embodiment except that the shape of the spring portion 60 is different.

  As shown in FIG. 6B, the spring portion 60 of the seal device 12 is movable relative to the connection end portion 68 connected to the second end portion 28 of the seal body portion 20 and the seal body portion 20. And a free end 66. As shown in FIGS. 6 (A) and 6 (B), the spring portion 60 has a trough portion 64 that contacts the back surface 24 of the main body and a peak portion 62 that maximizes the gap between the back surface 24 of the main body. The spring portions 60 are alternately formed from the portion 68 toward the free end portion 66, and the spring portion 60 has a trapezoidal wave shape.

  As shown in FIG. 6A, the free end portion 66 of the spring portion 60 is formed with a first engagement portion 66 a that engages with the first protrusion 46 of the spring holder 40, and the spring portion 60. The connection end 68 is formed with a second engagement portion 68 a that engages with the second protrusion 48 of the spring holder 40. Similarly to the sealing device 10 according to the first embodiment, the sealing device 12 is also inserted into the facing groove 52 in a state where the spring holder 40 is attached to the seal body 20 and the spring 60.

  FIG. 7 is an enlarged perspective view in which a peak 62 in the spring portion 60 of the sealing device 12 is enlarged. On the peak portion 62 of the spring portion 60, peak portion protrusions 62 a and 62 b are formed at both ends of the seal body portion 20 in the short direction. The peak protrusions 62a and 62b protrude toward the side opposite to the main body back surface 24 side when viewed from the spring part 60 (see FIG. 6A). The spring part 60 is manufactured by processing one material, and the peak part 62 and the valley part 64 where the peak protrusions 62a and 62b are formed are integrated. The crest protrusions 62 a and 62 b are produced by bending or bending both ends 63 a and 63 b in the short direction of the members constituting the crest 62, and the both ends 63 a and 63 b are viewed from the spring portion 60. It has a shape curled toward the side opposite to the main body back surface 24 side.

  FIG. 8 is a cross-sectional view of the sealing device 12 inserted into the facing groove 52, and shows a cross section passing through the peak portion 62 in the sealing device 12. The crest protrusions 62a and 62b are in contact with the mounting wall surfaces 56a and 56b of the opposing groove 52, and the positions of the first groove 52a and the second groove 52b constituting the opposing groove 52 are affected by thermal stress or the like. Even when it deviates in the thickness direction, the contact with the mounting wall surfaces 56a and 56b can be maintained. Thereby, in the sealing device 12, the pressing force by the spring portion 60 acts on the two seal surface protrusions 23a and 23b formed on the main body seal surface 22 in a well-balanced manner, thereby providing a preferable sealing performance.

  Further, the spring portion 60 having the peak protrusions 62a and 62b has portions other than the peak protrusions 62a and 62b (the peak protrusion 62a in FIG. 8) when the peak protrusions 62a and 62b contact the mounting wall surfaces 56a and 56b. And the portion between 62b) can be protected from damage due to wear. Therefore, the spring portion 60 having the peak portion protrusions 62a and 62b can suitably maintain the force pressing the seal main body portion 20 toward the facing groove 52, and has high durability. Furthermore, the crest 62 having the crest protrusions 62a and 62b has both ends 63a and 63b in the short direction wound or folded back. As a result, even if the sealing device 12 moves or deforms inside the opposing groove 52, the crest 62 is worn because it contacts the first groove 52a and the second groove 52b with an arcuate curved surface. It is difficult to prevent the opposing groove 52 from being damaged.

  Further, the spring portion 60 of the sealing device 12 is formed with the peak protrusions 62a and 62b without joining another member, etc., so that it has excellent durability and is easy to manufacture. Furthermore, since the spring portion 60 of the sealing device 12 is reinforced at the contact portion with the facing groove 52 by the peak protrusions 62a and 62b, this point is also excellent in durability. The sealing device 12 according to the second embodiment has the same effect as the sealing device 10 according to the first embodiment.

Third Embodiment FIGS. 9A and 9B are perspective views of a sealing device 14 according to a third embodiment of the present invention. In the sealing device 14, the spring holding means that holds the spring portion 80 in an extended state is an engagement protrusion 75 formed on the main body back surface 24 of the seal main body portion 20, and the sealing device 10 according to the first embodiment. And different.

  As shown in FIGS. 9A and 9B, the sealing device 14 includes a seal main body portion 70 and a spring portion 80. Similar to the seal main body 20 according to the first embodiment, the seal main body 70 has an elongated plate shape, and includes a main body seal surface 72 and a main body back surface 74. The main body back surface 74 has a corrugated shape, and a spring portion 80 that intermittently contacts the main body back surface 74 of the seal main body portion 70 is disposed.

  The connection end portion 88 that is one end portion of the spring portion 80 is connected to the second end portion 78 that is one end portion of the seal body 70 in the same manner as the sealing device 10 according to the first embodiment. . The free end portion 86 of the spring portion 80 can relatively move in the longitudinal direction of the seal main body portion 70.

  A first engagement portion 86 a is formed at the free end portion 86 of the spring portion 80. The first engagement portion 86a is a rectangular through hole, but is not particularly limited as long as the first engagement portion 86a has a shape engageable with the engagement protrusion 75. An engaging protrusion 75 is formed on the first end 76 of the main body back surface 74. The engaging protrusion 75 is formed by lifting a part of the seal body 70 and has a claw-like shape, but the forming method and shape of the engaging protrusion 75 are not particularly limited. The position of the engaging protrusion 75 is designed such that the first engaging portion 86a is engaged with the engaging protrusion 75 so that the spring portion 80 is held in an extended state.

  As shown in FIG. 9A, the sealing device 14 is inserted into the facing groove 52 (see FIG. 4) in a state where the first engaging portion 86a is engaged with the engaging protrusion 75. Then, after the insertion to the predetermined position with respect to the opposing groove 52, the spring part 80 causes the seal main body part 70 of the opposing groove 52 to be released by releasing the engagement between the first engaging part 86a and the engaging protrusion 75. It will be in the state which can demonstrate the force pressed against a wall surface.

  Even when the facing groove 52 is deformed, the sealing device 14 maintains the contact between the main body sealing surface 72 and the sealing wall surfaces 54a and 54b (see FIG. 4) by the restoring force of the spring portion 80. Play. Further, the sealing device 14 inserts the first engaging portion 86a formed on the free end portion 86 of the spring portion 80 into the facing groove 52 in a state where the first engaging portion 86a is engaged with the engaging protrusion 75, so The thickness of the sealing device 14 can be reduced, and the sealing device 14 can be smoothly inserted into the facing groove 52. Furthermore, the sealing device 14 can prevent the wall surface of the opposing groove 52 and the sealing device 14 itself from being worn and damaged during assembly and disassembly. Furthermore, since the sealing device 14 does not require a member to be removed from the sealing device 14 except when the sealing device 14 is attached or detached, the overall configuration is simple.

DESCRIPTION OF SYMBOLS 10, 12, 14 ... Sealing device 20, 70 ... Seal main body part 22, 72 ... Main body sealing surface 23a, 23b ... Sealing surface protrusion 24, 74 ... Main body rear surface 75 ... Engaging protrusion 26, 76 ... First end part 26a ... First through hole 28, 78 ... Second end 28a ... Second through hole 30, 60, 80 ... Spring portion 62 ... Mountain portion 62a, 62b ... Mountain portion protrusion 63a, 63b ... Tip 64 ... Valley portion 36, 66, 86 ... Free end portions 36a, 66a, 86a ... First engagement portions 38, 68, 88 ... Connection end portions 38a, 68a ... Second engagement portions 40 ... Spring holder 46 ... First projection portion 48 ... Second projection Part

Claims (7)

A main body sealing surface and a main body back surface opposite to the main body sealing surface; an elongated plate-shaped sealing main body;
The seal body having a corrugated shape that intermittently contacts the back surface of the main body, connected to one end of the seal main body, and an end opposite to the connection end A free end portion that can move relative to the spring portion, and
The sealing device according to claim 1, wherein a first engagement portion is formed at the free end portion of the spring portion to engage with a spring holding means and extend the spring portion longer than a free length of the spring portion. A second engagement portion is formed at the connection end of the spring portion,
The spring holding means is formed at a connection portion extending in the longitudinal direction of the seal main body portion and both ends of the connection portion, and a first protrusion protruding from the connection portion in the thickness direction of the seal main body portion. And a second protrusion.
2. The seal according to claim 1, wherein the first protrusion is detachably engaged with the first engagement part, and the second protrusion is detachably engaged with the second engagement part. apparatus.   A second through hole is formed in the one end portion of the seal main body portion through which the second protrusion portion is inserted, and the first protrusion portion is inserted in the other end portion of the seal main body portion. The sealing device according to claim 2, wherein a first through hole is formed.   The sealing device according to claim 1, wherein the spring holding means is a protrusion formed on the back surface of the main body. The spring part alternately has a valley part that contacts the back surface of the main body and a peak part that maximizes the gap between the back surface of the main body from the connection end part toward the free end part,
5. The ridge portion is formed with ridge protrusions that protrude on the opposite side of the back surface of the main body at both ends in the short direction of the seal main body portion. The sealing apparatus in any one.   The crest where the crest protrusion is formed has a shape in which both ends in the short direction of a member constituting the crest are curled toward the opposite side to the back of the main body. The sealing device according to claim 5.   The sealing device according to claim 6, wherein the ridge protrusion is produced by bending both ends of the member constituting the ridge in the short direction.

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