JP6527738B2 - duct - Google Patents

Description

The present invention relates to a duct which is connected by inserting the connecting portion of the connection object on the inside of the sealing material.

  For example, in vehicles such as automobiles, various ducts are used for intake air to an engine, air conditioning piping of an air conditioner, and the like. Such a duct is configured to be connected in a sealed state maintaining airtightness by a sealing material interposed between the duct and the connection portion by inserting the connection portion of the connection object from the insertion port . The structure which connects a duct in the said sealing state with a sealing material is disclosed by patent document 1, for example. In Patent Document 1, the connecting portion of the duct is inserted into a connector having a sealing material provided on the inner peripheral surface, thereby sealing between the inner peripheral surface of the connector and the outer peripheral surface of the connecting portion with the sealing material There is. That is, the inner diameter of the sealing material is designed to be smaller than the outer diameter of the connecting portion, and when the connecting portion is inserted, the sealing material is a duct only by the difference between the inner diameter of the sealing member and the outer diameter of the connecting portion. A sealing force corresponding to the restoring force of the sealing material generated by being elastically expanded in the radial direction and elastically compressed with the inner circumferential surface of the duct is configured to be developed.

Unexamined-Japanese-Patent No. 2006-266475

  Here, in order to insert the connecting portion into the sealing material, it is necessary to elastically deform (expand and compress) the sealing material by the difference between the inner diameter of the sealing material and the outer diameter of the connecting portion as described above. For this reason, when inserting the said connection part in a sealing material, a big force (insertion load) is needed, and the workability of duct connection operation is low. In particular, in order to increase the sealing force, it is necessary to increase the difference, and the connection work efficiency of the duct is lowered by the further increase of the insertion load. Also, when the connecting portion is inserted into the seal material, the seal material elastically deforms more than or equal to the final seal state as the seal member expands and compresses, and therefore the frictional resistance according to the restoring force accompanying the elastic deformation. There is a problem that it is difficult to insert the connecting portion, because the connecting portion needs to be inserted to a predetermined mounting position in a state where a problem occurs.

That is, in view of the problems inherent in the prior art, the present invention has been proposed to suitably solve these problems, and the required sealing force while enhancing the connection workability with the connection part of the connection object and to provide a duct that can be obtained.

In order to overcome the problems and achieve the intended purpose, the invention according to claim 1 of the present application is:
It is a duct connected by inserting the connecting part of the connection object inside the sealing material,
A duct portion forming a fluid passage;
A movable portion movable relative to the duct portion in a duct extending direction;
A compression section provided in the duct portion and the movable portion so as to sandwich the sealing material in the duct extending direction, and compressing the sealing material in the duct extending direction with relative movement of the duct portion and the movable portion ,
And a restricting portion that abuts on an outer peripheral side of the sealing material to restrict elastic deformation of the sealing material to the outer peripheral side.
The seal member elastically deformed along with the compression in the duct extending direction by the compression unit is configured to be pressed against the outer peripheral surface of the connection portion inserted inside the seal member ,
A holding portion is provided which holds the relative position of the duct portion and the movable portion in a state where the sealing material is compressed in the duct extending direction by the compression portion.
The holding portion is a first engaging portion provided in the duct portion, and a second engaging portion provided in the movable portion to be separated from the first engaging portion in the duct extending direction The first engaging portion and the second engaging portion by relatively moving the duct portion and the movable portion so as to compress the seal material in the duct extending direction by the compression portion. Configured to be engageable and
The movable portion may be provided with an abutting portion capable of coming into contact with the connection object in the duct extending direction in a state before the sealing material is compressed in the duct extending direction. .

According to the first aspect of the invention, when the seal material is compressed in the duct extending direction by the compression portion provided so as to sandwich the seal material in each of the duct portion and the movable portion, the restriction portion The final sealing force can be obtained by pressing the sealing material whose elastic deformation is restricted to the outer peripheral surface of the connecting portion. Thus, in the step before relative movement of the duct portion and the movable portion to compress the seal material in the duct extending direction (that is, the step before the final sealing force is obtained), the connection portion of the connection object is It becomes possible to easily insert into the sealing material, and it is possible to reduce the insertion load when inserting the connecting part into the sealing material. Then, in a state where the connecting portion is inserted into the sealing material, the sealing member can be finally obtained by relatively moving the duct portion and the movable portion and compressing the sealing material in the duct extending direction by the compression portion. It is possible to prevent the sealing performance from being impaired. In this manner, it is possible to obtain the required sealing force while enhancing the connection workability between the duct and the connection part of the connection object. Further, since the relative position between the duct portion and the movable portion is held by the holding portion, it is possible to prevent the compression state of the seal material by the compression portion from being released by the restoring force of the seal material elastically deformed with compression. Furthermore, when the connection portion is inserted in the duct extending direction into the insertion port of the duct, the position of the movable portion in which the contact portion is in contact with the connection object can be regulated. Therefore, the duct portion can be moved relative to the movable portion with the insertion operation of the connection portion to the insertion port of the duct, and the seal material is compressed in the duct extending direction along with the insertion operation. At the same time, the first engagement portion of the duct portion and the second engagement portion of the movable portion which are separated in the duct extension direction can be engaged with each other. That is, with the series of operations of inserting the connecting portion into the insertion port, the sealing material is compressed in the duct extending direction to seal with the required sealing force, and at the same time both engaging portions are engaged. The state in which the sealing force can be obtained can be maintained.

The invention according to 請 Motomeko 2,
Upon sealing with a sealing material between the outer peripheral surface of the connecting portion of the connecting object and an inner peripheral surface of the duct,
A first compression portion and a second compression portion for compressing the seal material in a duct extending direction in a state where the connection portion of the connection object is inserted inside the seal material,
An outer periphery of the connecting portion is provided with a restricting portion that restricts the elastic deformation of the sealing member to the outer peripheral side, and the elastic deformation of the sealing member along with the compression in the duct extending direction by the first and second compression portions. The gist is that it is configured to be pressed against a surface.

According to the second aspect of the present invention, the seal member is compressed in the duct extending direction by the first compression portion and the second compression portion in a state where the connection portion of the connection object is inserted inside the seal material. With this configuration, it is easy to connect the connection part of the connection object to the seal material in the stage before the seal material is compressed in the duct extending direction by both compression sections (that is, the stage before the final sealing force is obtained). It is possible to insert the connector into the seal member and to reduce the insertion load when inserting the connecting portion into the seal material. Further, in a state where the seal material is compressed in the duct extending direction by the first and second compression parts, the seal material whose elastic deformation to the outer peripheral side is restricted by the restriction part is pressed against the outer peripheral surface of the connecting part Finally, the required sealing force can be obtained, and the sealability can be prevented from being impaired. In this manner, it is possible to obtain the required sealing force while enhancing the connection workability between the duct and the connection part of the connection object.

The invention according to claim 3 is
A gist is that a holding portion for holding the first compression portion and the second compression portion is provided at a position where the seal material is compressed in the duct extending direction.
According to the third aspect of the present invention, since the first compression section and the second compression section can be held at the position where the seal material is compressed in the duct extending direction, the restoring force of the seal material elastically deformed along with compression. By this, it is possible to prevent the compression state of the sealing material by both compression parts from being released.

According to duct according to the present invention, while improving the connecting operation of the connecting portion of the connecting object, it is possible to obtain the required sealing force.

It is the perspective view which observed the duct which concerns on an Example from the duct main body side, Comprising: The outer shell part and connection part of a connection object are shown with a dashed-two dotted line. It is the perspective view which observed the duct which concerns on an Example from the insertion port side. It is a disassembled perspective view of a duct (a shell part and a connection part) concerning a duct and a connection subject concerning an example. It is sectional drawing which shows the duct which concerns on an Example, and a connection object, Comprising: (a) shows the state which isolate | separated the duct from the connection part, (b) shows the state which connected the connection part to the duct. (a)-(e) is an expanded sectional view around the seal material in the duct concerning an example, and (a) shows the state before inserting a connecting part in the seal material, (b) is a seal (C) shows a state in which the same diameter cylindrical portion is inserted into the seal material before the seal material is compressed in both compression sections, (d) Shows a state in which the seal material compressed in the duct extending direction in both compression parts is pressed against the seal planned part of the connection part to seal, and (e) does not insert the connection part and ducts the seal material in both compression parts The state of compression in the extension direction is shown. (ax) to (dx) are enlarged cross-sectional views around the seal material in the duct according to the comparative example, where (ax) shows a state before the connection portion is inserted into the seal material, and (bx) is a seal (Cx) shows a state where the same diameter cylindrical portion is inserted and inserted into the sealing material, and (dx) shows a sealing material of the connecting part with the sealing material. Indicates the state of sealing. It is an expanded sectional view of the duct concerning an example, and (a) shows the example of change which provided the sealing material in a movable part, (b) is the change using the sealing material of the cross section shape which inclines to the duct diameter direction. An example is shown, and (c) shows a modification using a bellows-shaped cross-sectional seal. It is sectional drawing which shows the modification of the seal structure which compresses a sealing material by the 2nd compression part formed in the connection part. It is sectional drawing which shows the modification based on this invention of the structure which extrapolates a movable part to a duct part.

Then, per duct according to the present invention, by way of preferred embodiments will be described below with reference to the accompanying drawings. In the embodiment, a duct disposed in an engine room of a car will be described as an example.

  As shown in FIGS. 1 to 3, the duct 10 according to the embodiment includes a duct portion 12 forming a duct fluid passage (fluid passage) 16 through which air (fluid) flows, and the duct portion 12. A tubular movable portion 36 relatively movable in the duct extending direction, an annular sealing member 34 disposed on the inner peripheral surface of the duct portion 12, and a sealing member 34 interposed in the duct extending direction The sealing member 34 is compressed in the duct extending direction by the compression portions 20 and 40 provided in the duct portion 12 and the movable portion 36 and capable of compressing the sealing material 34 in the duct extending direction, and the compression portions 20 and 40 The holding unit 22 holds the relative position of the duct unit 12 and the movable unit 36 in the state. Then, a connecting member 54 provided on a connection object 52 such as a turbocharger or a throttle valve of an engine is inserted from an insertion port 10a opened at an end of the duct 10 (specifically, the movable portion 36) By being inserted into the inside of 34, the space between the inner circumferential surface of the duct portion 12 and the outer circumferential surface of the connecting portion 54 is sealed. The duct 10 has a shape that is appropriately bent or bent according to the positional relationship of the connection object 52 or the like, while avoiding other members disposed in the engine room, but the connecting portion 54 is inserted in the duct 10 The range is formed to extend in a straight line, and the extension direction of the end where the connection portion 54 is inserted in the duct 10 is referred to as a duct extension direction (see FIG. 3). And the position finally sealed by the sealing material 34 on the outer peripheral surface of the connecting portion 54 is referred to as a portion to be sealed 54 a (see FIG. 4B). From the viewpoint of heat resistance and formability, polyamide (PA) and fiber-reinforced polyamide (PA) are often used as the material of the duct portion 12 and the movable portion 36, and polybutylene terephthalate resin (PBT) is used. And synthetic resins such as polycarbonate (PC), polyester thermoplastic elastomer (TPEE), olefin thermoplastic elastomer (TPO), polyethylene (PE), and polypropylene (PP).

  Here, as the form of the connecting portion 54 formed in the connection object 52, various names exist depending on the type of the connection object 52, the required performance, and the like. For example, in the connection object 52, a connection portion 54 which protrudes in a cylindrical shape with a constant outer diameter shape from the outer shell portion 56, or a connection having one or a plurality of steps for preventing detachment projecting radially outward at its tip The portion 54 and the like are generally provided, and the duct 10 is connected to the connecting portion 54. In addition, such a connecting portion 54 is formed in a cylindrical shape having a circular cross section, a rectangular cylindrical shape having a rectangular shape, or an elliptical shape. In FIG. 3 and FIG. 4, a connecting portion 54 which is formed in a cylindrical shape having a circular cross section and in which a step projection is formed at the tip end is shown. In the following description, a portion formed in a cylindrical shape with a constant outer diameter in the connecting portion 54 is referred to as the same diameter cylindrical portion 60 and extends over the entire circumference at the tip of the same diameter cylindrical portion 60. The formed protrusion for retaining may be referred to as a protrusion 62. In addition, a connection fluid passage 58 through which air (fluid) flows is formed in the connection portion 54, and the connection portion 54 is connected to the duct 10 in a sealing state by the sealing material 34. The duct fluid passage 16 of 10 and the connection fluid passage 58 of the connection portion 54 are in sealed communication.

(Duct part)
As shown in FIG. 3 and FIG. 4, the duct portion 12 is formed at the end of the duct main body 19 and a tubular duct main body 19 in which the fluid passage 16 is formed to form the main body of the duct 10 And a sliding cylindrical portion 18 in which the seal member 34 is disposed. Then, the sliding cylindrical portion 18 is movable in a state in which the movable portion 36 can move in the duct extending direction via an end opening on the opposite side of the duct main body 19 in the sliding cylindrical portion 18 (hereinafter referred to as the duct portion opening 12a). Is interpolated to Here, the sliding cylindrical portion 18 is set to an inner diameter larger than the inner diameter of the duct main body 19, and the boundary position between the duct main body 19 and the sliding cylindrical portion 18 on the inner peripheral surface side of the duct 12. Are formed in steps. That is, the end 20 of the duct body 19 on the side of the sliding cylinder 18 faces the end 40 of the movable portion 36 inserted in the sliding cylinder 18 in the duct extending direction. There is. In the embodiment, the outer diameter of the sliding cylindrical portion 18 is set larger than the outer diameter of the duct main body 19, and the duct main body 19 and the sliding cylindrical portion 18 are also formed on the outer peripheral surface side of the duct portion 12. The boundary position of is step-like. Although each of the duct main body 19 and the sliding cylindrical portion 18 in the above embodiment is formed in a cylindrical shape, it may have a cross-sectional shape in accordance with the cross-sectional shape of the connecting portion 54. That is, in the case of the duct 10 to which the connecting portion 54 formed in a rectangular cylindrical shape is connected, it is preferable that the duct main body 19 and the sliding cylindrical portion 18 be similarly formed into a rectangular cylindrical shape.

  As shown in FIGS. 3 and 4, the seal member 34 has its outer peripheral end abutted on the inner peripheral surface 18 a of the sliding cylindrical portion 18, and the end 20 of the duct main body 19 on the sliding cylindrical portion 18 side. It is arranged in a state where one end in the duct extension direction (end on the back side of the duct portion 12) abuts. That is, when the movable portion 36 is relatively moved toward the back side of the duct portion 12, the sealing material 34 is sandwiched between the end 20 of the duct main body 19 and the end 40 of the movable portion 36. The seal material 34 can be compressed in the extending direction. As described above, in the duct 10 of the embodiment, the end 20 of the duct main body 19 on the sliding cylinder 18 side and the end 40 of the movable portion 36 are respectively provided in the duct 12 and the movable portion 36. The compression units 20 and 40 are provided. The compression unit provided in the duct unit 12 is referred to as a first compression unit 20, and the compression unit provided in the movable unit 36 is referred to as a second compression unit 40.

  Here, as the sealing material 34, one that is elastically deformed so as to spread in the radial direction of the duct when compressed in the duct extending direction is adopted. In the embodiment, a so-called O-ring having an O-shaped (circular) cross-sectional shape is used as the sealing material 34, and the outer peripheral side of the sealing material 34 is in contact with the entire circumference of the inner peripheral surface 18a of the sliding cylinder 18 It is configured to touch. That is, when the seal member 34 is compressed in the duct extending direction by being sandwiched between the first compression portion 20 of the duct portion 12 and the second compression portion 40 of the movable portion 36, the seal member 34 is The elastic deformation of the sliding cylindrical portion 18 is restricted by the inner peripheral surface 18 a of the sliding cylindrical portion 18 so as to be elastically deformed to the inner peripheral side (the inner side in the duct radial direction) of the sealing material 34. That is, the inner peripheral surface 18 a of the sliding cylindrical portion 18 serves as a restricting portion that restricts the elastic deformation of the seal member 34 toward the outer peripheral side. The sealing material 34 may have a solid shape or a hollow shape. As the material of the sealing material 34, rubber or elastomer can be used, and from the viewpoint of heat resistance, oil resistance, etc., fluorocarbon resin, silicone resin, acrylic resin, fluorocarbon rubber, silicone rubber, acrylic rubber, chloroprene rubber (CR), ethylene propylene diene rubber (EPDM), acrylonitrile butadiene rubber (NBR) and the like are preferable.

  Further, as shown in FIGS. 3 and 4, the first engagement portion constituting the holding portion 22 is provided at the opening end portion of the duct portion 12 (sliding cylindrical portion 18) on the duct portion opening 12 a side. 24 are provided. The first engagement portion 24 is configured to engage with a second engagement portion 44 constituting the holding portion 22 provided on the movable portion 36 as described later, and the first engagement portion 24 The engagement of the portion 24 and the second engagement portion 44 prevents the movable portion 36 from moving in the direction of coming out of the duct portion opening 12 a with respect to the duct portion 12. That is, by the engagement of the first and second engagement portions 24 and 44, the first and second compression portions 20 and 40 are held at positions where the seal material 34 is compressed in the duct extending direction. A plurality of first engaging portions 24 are provided equally spaced in the circumferential direction of the duct portion 12. In the embodiment, two first engagement portions 24 are formed at the open end of the duct portion 12 at intervals of about 180 degrees in the circumferential direction. The first engagement portion 24 is formed to project from the open end so as to extend in the duct extending direction, and the insertion piece 26 elastically deformable in the duct radial direction, and the extension of the insertion piece 26 The outer circumferential surface of the claw portion 28 is formed with an inclined surface 28a which is inclined inward in the radial direction as it is separated from the insertion piece 26. There is.

(movable part)
As shown in FIG. 3, the movable portion 36 is a cylindrical base 38 which is inserted from the duct portion opening 12 a of the duct portion 12 (specifically, the sliding cylindrical portion 18) and penetrates in the duct extending direction. And an overhanging portion 41 projecting outward in the duct radial direction from one end of the base portion 38. That is, in a state where the base 38 slides along the inner peripheral surface 18 a of the sliding cylinder 18, the movable portion 36 with respect to the duct 12 extends in the duct extending direction (i.e., the back side of the duct 12). Can be moved relative to each other in the direction of movement and in the direction in which the base portion comes out of the duct portion 12). Here, the inner diameter of the base 38 is set to be equal to or larger than the outer diameter of the connecting portion 54 (more specifically, the outer diameter B2 of the projecting portion 62 or more). The connecting portion 54 can be inserted into the base 38 in the inserted state. That is, the opening of the movable portion 36 on the side of the projecting portion 41 is the insertion port 10 a of the duct 10 into which the connecting portion 54 of the connection object 52 is inserted.

  Then, as shown in FIG. 4, the second compression in which the end of the base 38 inserted in the duct portion 12 opposes the first compression portion 20 of the duct portion 12 with the seal member 34 interposed therebetween. The first and second compressions according to relative movement between the duct portion 12 and the movable portion 36 (specifically, relative movement of the base 38 toward the back side of the duct portion 12). The seal member 34 is compressed in the duct extending direction by the portions 20 and 40. That is, from the state in which the second compression unit 40 is separated from the seal member 34 (see FIG. 4A), the duct unit 12 (first compression unit 20) such that the second compression unit 40 approaches the seal member 34 And the movable portion 36 (the second compression portion 40) relatively move in the duct extension direction, the seal material 34 is compressed in the duct extension direction between the first compression portion 20 and the second compression portion 40. (See FIG. 4 (b)). Here, the first and second compression parts 20 and 40 are configured to abut on the entire circumference of the end in the duct extension direction of the sealing material 34, and the first and second compression parts The entire circumference of the seal member 34 can be uniformly compressed by 20 and 40.

  Here, when the sealing material 34 is compressed in the duct extending direction by both the compression sections 20 and 40, the deformation of the sealing material 34 to the outside in the radial direction of the duct is limited by the sliding cylindrical section 18 of the duct section 12. Thus, the seal member 34 is elastically deformed so as to expand in the duct radial direction. At this time, as shown in FIG. 5 (e), the inner diameter A2 of the sealing material 34 compressed by both the compression sections 20 and 40 in the state where the connection section 54 is not inserted is the same diameter cylinder of the connection section 54. The seal material 34 is set to be smaller than the external dimension B1 of the portion 60 (the portion to be sealed 54a) and elastically deformed inward in the duct extending direction along with the compression of the compression portions 20 and 40. It is comprised so that it may be pressed and sealed by the part 54a. That is, as for the inner diameter of the seal member 34, the inner diameter A2 of the seal 34 compressed by both the compression units 20 and 40 without inserting the connection portion 54 is the same diameter cylindrical portion 60 of the connection portion 54 If the connecting portion 54 can be inserted in a range smaller than the outer dimension B1 of the portion 54a), it can be set according to the sealing force to be finally exerted. In the embodiment, as shown in FIG. 5A, the inner diameter dimension A1 of the seal material 34 before compression in the duct extending direction by both the compression sections 20 and 40 with the connection section 54 not inserted is the connection The outer diameter dimension B1 of the same diameter cylindrical portion 60 (the portion to be sealed 54a) of the portion 54 is set to be equal to or larger than B1. More specifically, the inside diameter A1 of the sealing material 34 is set larger than the outside diameter B1 of the same diameter cylindrical portion 60, and the same diameter cylindrical portion 60 is configured not to compress the sealing material 34 in the duct diameter direction. ing. Further, the inside diameter A1 of the sealing material 34 is set to be smaller than the outside diameter B2 of the projecting portion 62 in the connecting portion 54, and the projecting portion 62 is disposed in the duct portion 12 than the disposition position of the sealing material 34. The duct 10 is prevented from dropping out of the connecting portion 54 by inserting it to the far side of the case.

  Further, as shown in FIG. 1, FIG. 2 or FIG. 4, in the state where the base 38 of the movable portion 36 is inserted into the sliding cylindrical portion 18 of the duct portion 12, the overhang portion 41 from the duct portion opening 12 a Are configured to protrude. That is, when the connecting portion 54 is inserted into the insertion port 10 a, the first and second compression portions 20 and 40 are in a state before the sealing material 34 is compressed in the duct extending direction, The end 45 of the movable portion 36 on the side of the projecting portion 41 protruding outward is brought into contact with the outer shell 56 of the connection object 52 so that the position of the movable portion 36 relative to the connection object 52 can be restricted. ing. In the following description, in the movable portion 36, an end portion of the movable portion 36 which can project to the outside of the duct portion 12 and can be in contact with the outer shell portion 56 of the connection object 52 is referred to as an abutting portion 45. That is, by bringing the contact portion 45 into contact with the connection object 52, the duct portion 12 is moved in the duct extending direction with respect to the movable portion 36 whose position is restricted with respect to the connection object 52. The seal material 34 can be compressed in the duct extending direction.

  Further, as shown in FIGS. 1, 2 and 4, the overhanging portion 41 extends from the outer peripheral surface of the base portion 38 radially outward from the outer peripheral surface of the sliding cylindrical portion 18 in the duct portion 12. A second engaging portion 44 which is configured to hold the holding portion 22 and which can engage with the first engaging portion 24 of the duct portion 12. There is. Here, the second engagement portion 44 is opened in the duct extending direction, and the insertion port 46 into which the first engagement portion 24 (the insertion piece 26 and the claw portion 28) can be inserted, and the insertion The opening edge of the duct 46 in the duct radial direction in the port 46 is formed, and a locking piece 50 engageable with the claw portion 28 of the first engaging portion 24 inserted into the insertion port 46 is provided. Thus, the first engaging portion 24 of the duct portion 12 and the second engaging portion 44 of the movable portion 36 are positioned to be separated in the duct extending direction. That is, the first engaging portion 24 is inserted into the insertion opening of the second engaging portion 44 by relatively moving the duct portion 12 and the movable portion 36 in the duct extending direction so that both the engaging portions 24 and 44 approach each other. The claws 28 of the first engagement portion 24 can be engaged with the locking pieces 50 of the second engagement portion 44 by being inserted into 46. When the claws 28 of the first engaging portion 24 are inserted into the insertion opening 46, the inclined surface 28a of the claws 28 abuts on the opening edge of the insertion opening 46, and the difference is caused by the inclined surfaces 28a. The insertion piece 26 elastically deforms inward in the duct radial direction, and the claw portion 28 elastically returns when the claw portion 28 passes through the insertion opening 46, whereby the claw portion 28 engages with the locking piece 50. It is supposed to be.

  Here, as shown in FIG. 4, the dimension C from the first compression portion 20 to the claw portion 28 of the first engagement portion 24 (engagement position with the second engagement portion 44) is the second It is set to be longer than the dimension D from the compression section 40 of the second engaging section 44 to the locking piece 50 (engaging position with the first engaging section 24). The difference between the dimension C and the dimension D is set so as to be smaller than the dimension E (see FIG. 5D) in the duct extending direction of the sealing material 34 before being compressed by both the compression sections 20 and 40. It is done. Therefore, as shown in FIGS. 4 and 5 (d), the seal member 34 sandwiched by the first compression portion 20 and the second compression portion 40 in a state in which both the engagement portions 22 and 44 are engaged. Are compressed in the duct extending direction. That is, when the first engaging portion 24 and the second engaging portion 44 engage with each other, the restoring force of the sealing material 34 compressed by the compression portions 20 and 40 causes the duct portion 12 to open from the duct portion opening 12 a. The duct portion 12 and the movable portion 36 are held at a position where the seal member 34 is compressed in the duct extending direction by the compression portions 20 and 40 while restricting the relative movement of the movable portion 36 in the removal direction. .

(Provisional stop)
Further, as shown in FIGS. 3 and 4, the duct 10 is provided with a temporary fixing portion 30 for temporarily fixing the movable portion 36 to the duct portion 12. The temporary fixing portion 30 is provided at a position corresponding to the temporary fixing opening 32 provided in the sliding cylindrical portion 18 of the duct portion 12 and penetrating in the duct radial direction and the temporary fixing opening 32 in the base 38 of the movable portion 36 A temporary fixing projection 42 is provided, which protrudes outward in the duct radial direction and is inserted into the temporary fixing opening 32. That is, the duct portion 12 and the movable portion 36 in the embodiment can be relatively moved within the range in which the temporary fixing projection 42 contacts the opening edge of the temporary holding opening 32 in the duct extending direction. Thus, the duct portion 12 and the movable portion 36 can be handled integrally without falling out of the housing. The width of the temporary opening 32 and the temporary projection 42 in the duct extending direction is such that the second compression portion 40 is separated from the sealing material 34, and the second compression portion 40 is the first compression portion 20. Between the state in which the seal member 34 is compressed in the duct extending direction by both compression portions 20 and 40 (the state in which the first and second engagement portions 24 and 44 are engaged). , And the duct portion 12 and the movable portion 36 are dimensioned so as to be relatively movable in the duct extending direction.

  Further, the width in the duct circumferential direction of the temporary fixing opening 32 and the temporary fixing projection 42 is set to substantially the same size, and the relative movement of the duct portion 12 and the movable portion 36 in the duct circumferential direction is It is supposed to regulate at 30. That is, the duct 10 of the embodiment is configured such that the first engagement portion 24 and the second engagement portion 44 are always aligned in the duct extending direction, and the compression member 20 and 40 duct the sealing material 34 By relatively moving the duct portion 12 and the movable portion 36 so as to compress in the extending direction, the first engagement portion 24 and the second engagement portion 44 can be engaged.

  Here, as shown in FIG. 4, the temporary fixing opening 32 is provided in the sliding cylindrical portion 18 so as to be positioned closer to the duct portion opening 12 a (the insertion port 10 a) than the disposition position of the sealing member 34. The sealability by the seal member 34 is not impaired by the temporary fixing opening 32. Further, a pair of slits 43 sandwiching each temporary fixing projection 42 in the circumferential direction is formed in the base portion 38 of the embodiment, and the base portion from the duct portion opening 12a is elastically deformed inward in the radial direction of the duct. By inserting 38 into the sliding cylindrical portion 18, the temporary locking projection 42 can be easily made to face the temporary locking opening 32. In addition, since the slit 43 is located outside the connection portion 54, the sealability is not affected.

(Operation of the embodiment)
Next, the operation of the duct 10 and the seal structure according to the embodiment will be described. In the duct 10 and the seal structure according to the embodiment, when the seal material 34 is compressed in the duct extending direction by the first compression section 20 and the second compression section 40 positioned with the seal material 34 in between, the sliding cylinder By elastically deforming the seal member 34 whose elastic deformation to the outer peripheral side is restricted by the inner peripheral surface 18a of the portion 18 so as to protrude inward in the duct radial direction, the seal member 34 is pressed against the outer peripheral surface of the connecting portion 54 , Demonstrate the sealing force required in the end. That is, at the stage before the sealing material 34 is compressed in the duct extending direction by both the compression sections 20 and 40 (that is, the stage before the final sealing force is obtained), the sealing material 34 is formed by the both compression sections 20 and 40. The inner diameter dimension of the sealing material 34 can be increased as compared with the state in which the pressure in the duct extending direction is compressed. That is, since the connecting portion 54 of the connection object 52 can be inserted into the sealing member 34 before the diameter of the sealing member 34 is reduced along with the compression in the duct extending direction, the connecting portion 54 can be inserted. It becomes possible to reduce the insertion load at the time of inserting and inserting in the sealing material 34, and the connecting portion 54 is easily inserted and inserted in the sealing material 34. Then, the seal material 34 compressed in the duct extending direction by the first compression unit 20 and the second compression unit 40 is pressed against the outer peripheral surface of the connection portion 54 in a state where the connection portion 54 is inserted to a predetermined mounting position. Finally, the required sealing force can be obtained, and the sealability can be prevented from being impaired.

  As described above, in a state in which the connecting portion 54 is inserted into the sealing member 34, the sealing member 34 can be compressed in the duct extending direction, whereby resistance when connecting the duct 10 and the connecting portion 54 is achieved. The required sealing force can be obtained while improving the connection workability of the connection object 52 by suppressing the Further, by inserting the connecting portion 54 into the sealing member 34 and then compressing the sealing member 34 in the duct extending direction, the connecting portion 54 is sealed in a stage before the sealing member 34 is compressed in the duct extending direction. The sealing member 34 is pressed against the outer peripheral surface of the connecting portion 54 after the sealing member 34 is compressed in the duct extending direction, so that the connecting portion 54 is relative to the duct 10 in the duct extending direction. It becomes difficult to move. That is, in a state where the connecting portion 54 is inserted into the sealing member 34, the duct 10 can be easily connected to the connecting portion 54 by compressing the sealing member 34 in the duct extending direction, and the duct 10 is connected. It is hard to drop off from the part 54.

  In the duct 10 and the seal structure according to the embodiment, when the first compression unit 20 and the second compression unit 40 are moved close to each other in the duct extending direction and the sealing material 34 is compressed in the duct extending direction, The first engaging portion 24 and the second engaging portion 44 arranged to line up in the duct extending direction can be engaged. That is, the first engaging portion 24 and the second engaging portion 44 are engaged at the same time as the sealing member 34 is compressed in the duct extending direction and sealed by the required sealing force. It is possible to maintain the state of exerting power.

  In the duct 10 and the seal structure according to the embodiment, when the connecting portion 54 is inserted into the insertion port 10a in the duct extending direction, the contact portion 45 provided on the movable portion 36 is the outer shell of the connection object 52 By contacting 56, the position of the movable portion 36 can be regulated with respect to the connection object 52. For this reason, along with the insertion operation of the connection portion 54 into the insertion port 10a, the duct portion 12 is movable so as to compress the seal material 34 in the duct extending direction by the first compression portion 20 and the second compression portion 40. The first engaging portion 24 of the duct portion 12 and the second engaging portion 44 of the movable portion 36, which can be moved relative to each other and are arranged in the duct extending direction, are engaged with each other. It can be done. That is, in accordance with a series of operations of inserting the connecting portion 54 into the insertion port 10a, the sealing member 34 is compressed in the duct extending direction to seal with the required sealing force, and at the same time, both the engaging portions 24, 44 can be engaged to hold the state where the sealing force can be obtained.

  In the duct 10 and the seal structure according to the embodiment, since the movable portion 36 can be temporarily fixed to the duct portion 12 by the temporary fixing portion 30, the duct portion 12 and the movable portion 36 before being connected to the connection object 52 are integrated. It is possible to improve the handleability of the duct 10 by suppressing the loss of the movable portion 36 or the confusion with another member. Further, in a state where the movable portion 36 is temporarily fixed to the duct portion 12, the second compression portion 40 is separated from the seal member 34, and the seal member 34 is compressed in the duct extending direction by both compression portions 20 and 40. The duct portion 12 and the movable portion 36 are moved relative to each other in the duct extending direction so that the second compression portion 40 approaches the first compression portion 20 from the state before 34 can be compressed in the duct extension direction. Therefore, the connecting portion 54 can be inserted from the insertion port 10 a in a state where the movable portion 36 is temporarily fixed to the duct portion 12 and the movable portion 36 does not fall off from the duct portion 12. Thus, the connecting portion 54 is connected Workability at the time of doing is good. Further, by temporarily fixing the movable portion 36 to the duct portion 12 by the temporary fixing portion 30, the duct portion in a state where the first engaging portion 24 and the second engaging portion 44 are arranged in the duct extending direction. Since the relative movement of the duct 12 and the movable part 36 in the duct circumferential direction is restricted, the duct part 12 and the movable part 36 are relatively moved to compress the seal material 34 in the duct extending direction by the compression parts 20 and 40. , And the first engagement portion 24 and the second engagement portion 44 can be engaged.

  Next, a change in resistance when connecting the duct 10 and the connecting portion 54 will be described with reference to FIG. 5 in comparison with a comparative example. FIGS. 5 (a) to 5 (e) are enlarged cross-sectional views around the seal member 34 at each stage when connecting the duct 10 of the embodiment configured as described above and the connecting portion 54 having the projecting portion 62. It is. 5 (ax) to 5 (dx) are enlarged cross-sectional views of the periphery of the sealing material 34X at each stage when connecting the duct 10X of the comparative example and the connecting portion 54 having the projecting portion 62. FIG. Similar to the seal structure described in the prior art, in the comparative example, the seal material 34X is sealed only by compressing the seal material 34X in the duct radial direction, and the inner diameter Ax of the seal material 34X is the same diameter cylinder of the connecting portion 54. By making the diameter 60 smaller than the outer diameter dimension B1 of the portion 60, it is set to exhibit the same sealing force F as that of the embodiment.

  As shown in FIG. 5 (ax), the inner diameter Ax of the sealing material 34X of the comparative example is smaller than the outer diameter B1 of the same diameter cylindrical portion 60 (the tip of the connecting portion 54) of the connecting portion 54. When inserting the end of the connection portion 54 into 34X, the seal material 34X has the same inner diameter Ax and the same outer diameter B1 of the same diameter cylindrical portion 60, that is, the same as the final sealed state. Immediately elastically deform to expand and compress. On the other hand, in the embodiment, as shown in FIG. 5A, the inner diameter dimension A1 of the seal material 34 before compression in the duct extending direction by both compression portions 20 and 40 is the same diameter cylindrical portion 60 (connected Since it is larger than the outer diameter dimension B1 of the tip of the portion 54, the outer diameter dimension of the projecting portion 62 of the connection portion 54 contacts the seal material 34 at the portion where the inner diameter dimension A1 matches, By being inserted, the seal member 34 elastically deforms so as to gradually expand and compress along the outer circumferential surface of the protrusion 62 radially outward in the duct. As described above, in the comparative example, when inserting the tip of the connection portion 54 into the seal member 34X, it is necessary to elastically deform the seal member 34X in the same manner as in the final sealed state. The distal end of the connecting portion 54 is inserted into the sealing member 34 without elastically deforming the sealing member 34, and the sealing member 34 is elastically deformed gradually along the outer peripheral surface of the projecting portion 62. Resistance when inserting in 34 is small.

  As shown in FIGS. 5 (b) and 5 (b x), when the projecting end of the projecting portion 62 is inserted into the seal members 34 and 34 X, in both the embodiment and the comparative example, the projecting portion 62 is The duct is expanded and compressed radially outward by the difference between the outer diameter dimension B2 and the inner diameter dimensions A1 and Ax of the seal member 34. At this time, since the inside diameter A1 of the sealing material 34 of the embodiment is larger than the inside diameter Ax of the sealing material 34X of the comparative example, the protrusion 62 is inserted into the sealing material 34 in the embodiment compared to the comparative example. Resistance is small.

  As shown in FIG. 5 (cx), in the comparative example, while the same diameter cylindrical portion 60 is inserted into the sealing material 34X, the outer diameter dimension B1 of the same diameter cylindrical portion 60 of the sealing material 34X is the same. Because it elastically deforms only by the difference with, resistance occurs. On the other hand, in the embodiment, as shown in FIG. 5C, the inside diameter A1 of the sealing material 34 before compression in the duct extending direction by both compression parts 20 and 40 is outside the same diameter cylindrical part 60. Since it is larger than the diameter dimension B1, the seal member 34 and the same diameter cylindrical portion 60 before being compressed in the duct extending direction by the both compression portions 20 and 40 do not contact with each other. Thus, in the embodiment, the resistance at the time of inserting the same diameter cylindrical portion 60 into the seal member 34 in the connecting portion 54 can be reduced.

  As shown in FIG. 5 (dx), in the comparative example, in the state where the connection portion 54 is inserted to a predetermined mounting position and the connection is completed, the seal member 34X has the same diameter cylindrical portion 60 as its inner diameter Ax The duct is expanded and compressed radially outward by a difference from the outer diameter dimension B1 of 54a) to exert a sealing force F. On the other hand, in the embodiment, as shown in FIG. 5 (d), the seal member compressed in the duct extending direction by both compression portions 20 and 40 in a state in which the connection portion 54 is inserted to a predetermined mounting position and connection is completed. The pressing force 34 is exerted on the outer peripheral surface of the connecting portion 54 to exert the sealing force F.

  Thus, in the embodiment, when inserting the tip of the connecting portion 54 into the seal member 34, when inserting the projection 62 into the seal member 34, and inserting the same diameter cylindrical portion 60 into the seal member 34. Since each resistance at the time of carrying out is smaller than the corresponding resistance of a comparative example, the insertion load at the time of inserting connecting part 54 in seal material 34 is reduced compared with a comparative example. Further, in the embodiment, when the connecting portion 54 is inserted to a predetermined mounting position and the connection is completed, the sealing material 34 compressed in the duct extending direction by both compression portions 20 and 40 is pressed against the outer peripheral surface of the connecting portion 54 Since the state is maintained, the detachment difficulty of the duct 10 of the embodiment from the connection portion 54 is equal to or more than the detachment difficulty of the duct 10X of the comparative example from the connection portion 54. Here, in the comparative example, when the protrusion 62 is inserted into the seal member 34X, the seal member 34X is elastically deformed more than the final seal state, so the upper limit value of the final seal force is It is necessary to set in the range which can insert the protrusion part 62 in the sealing material 34X. In the embodiment, since the final sealing force can be developed by compressing the sealing material 34 in the duct extending direction by the first compression portion 20 and the second compression portion 40, the seal force that can be set can be set. It is possible to raise the upper limit value compared to the comparative example.

  Here, in the case of connecting the duct 10X of the comparative example and the connecting portion 54 without the projecting portion 62 (the outer diameter dimension of the entire connecting portion 54 is the same as the outer diameter dimension of the planned sealing portion 52a), At the stage of inserting the tip into the seal member 34X, the seal member 34 is elastically deformed as much as the final seal state, and the connecting portion 54 is specified in a state where the frictional resistance corresponding to the restoring force accompanying this elastic deformation occurs. It is necessary to insert it to the mounting position of. On the other hand, in the case of connecting the duct 10 of the embodiment and the connecting portion 54 without the projecting portion 62, the connecting portion has almost no resistance at the stage before compression in the duct extending direction by both compression portions 20 and 40. 54 can be inserted and sealed.

(Modification example)
The invention according to the present invention is not limited to the embodiments described above, but may be modified as follows. In addition, in the modification shown in FIGS. 6-8, the same code | symbol is attached | subjected to the member which has the same function as an Example.
(1) The duct is not limited to a duct of an intake system used for a car, and may be a duct used for piping of housing equipment, a duct through which liquid, powder, etc. circulate. Further, the length of the duct fluid passage formed in the duct body can be set arbitrarily.
(2) In the embodiment, the inner diameter of the seal material before compression is described as an example larger than the outer diameter of the seal planned portion in the connecting portion, but the inner diameter of the seal material before compression is the seal planned portion It may be equal to or less than the outer diameter.
(3) In the embodiment, the seal material is described in the example in which one end of the duct extending direction is disposed in contact with the first compression portion. However, as shown in FIG. The material 34 may be fixed to the second compression section 40 in a state where one end in the duct extension direction is in contact with the second compression section 40. In this case, the movable portion 36 and the seal member 34 can be manufactured as an integral body by two-color molding.
(4) In the embodiment, the so-called O-ring has been described as an example of the sealing material, but as shown in FIG. 6 (b), for example, a sealing material 34 having a cross-sectional shape inclined in the duct radial direction is used. Alternatively, the seal member 34 may be curved or bent to be pressed against the outer peripheral surface of the connecting portion 54 by compressing the seal member 34 in the duct extending direction by both the compression sections 20 and 40. Further, as shown in FIG. 6C, the seal member 34 is compressed in the duct extending direction by the both compression portions 20 and 40 using the seal member 34 having a bellows-shaped cross-sectional shape. You may make it press on an outer peripheral surface.
(5) The seal structure according to the present invention can also be applied to the duct 10 having no movable part as shown in FIG. That is, the second compression section 40 projecting outward in the duct radial direction is provided on the outer peripheral surface of the connection section 54 so as to be located across the seal member 34 in the duct extension direction with the first compression section 20. By relatively moving the duct 10 and the connection object 52 in the duct extension direction so that the compression sections 20 and 40 are close to each other, the seal member 34 is compressed in the duct extension direction by both compression sections 20 and 40 It is also good. Further, in this case, the second engagement portion 24 is engaged with the first engagement portion 24 at a position corresponding to the first engagement portion 24 provided in the duct 10 in the connection object 52 (specifically, the outer shell 56). , And the compression object 20 and the connection object 52 are relatively moved in the duct extension direction so that the seal member 34 is compressed in the duct extension direction by both the compression parts 20 and 40. The first compression section 20 and the second compression section 40 can be held at the position where the seal member 34 is compressed in the duct extending direction by the sections 20 and 40.
(6) In the embodiment, the duct portion is formed of the duct main body and the sliding cylinder portion, and the movable portion is inserted in the sliding cylinder portion, but the movable portion is extrapolated to the duct portion It is also possible. Specifically, as shown in FIG. 8, the first compression section 20 is provided at the end of the duct section 12 on the insertion port 10 a side, and the movable section 36 is configured to be externally inserted into the duct section 12. A second compression protruding inward in the duct radial direction so as to be positioned across the seal member 34 in the duct extending direction between the movable portion 36 and the first compression portion 20 at the end on the insertion port 10a side The unit 40 may be provided. In this case, the second engaging portion 44 is formed at the end of the movable portion 36 opposite to the insertion port 10 a, and the outer peripheral surface of the duct portion 12 corresponds to the second engaging portion 44. By providing the first engagement portion 24 engaged with the second engagement portion 44 at the position, when the seal member 34 is compressed in the duct extending direction by both the compression portions 20 and 40, both engagements are performed. The parts 24 and 44 can be engaged to hold the relative position of the duct part 12 and the movable part 36.
(7) The holding portion may be a fastening means such as a bolt and a nut.

10 duct, 12 duct portion (one member), 16 duct fluid passage (fluid passage),
18a inner circumferential surface (regulating portion) of sliding cylinder portion, 20 first compression portion (compression portion), 22 holding portion,
24 first engagement portion, 34 seal member, 36 movable portion (other member),
40 second compression portion (compression portion), 44 second engagement portion, 41a contact portion,
52 connection object (other member), 54 connection part

Claims (3)

It is a duct connected by inserting the connecting part of the connection object inside the sealing material,
A duct portion forming a fluid passage;
A movable portion movable relative to the duct portion in a duct extending direction;
A compression section provided in the duct portion and the movable portion so as to sandwich the sealing material in the duct extending direction, and compressing the sealing material in the duct extending direction with relative movement of the duct portion and the movable portion ,
And a restricting portion that abuts on an outer peripheral side of the sealing material to restrict elastic deformation of the sealing material to the outer peripheral side.
The seal member elastically deformed along with the compression in the duct extending direction by the compression unit is configured to be pressed against the outer peripheral surface of the connection portion inserted inside the seal member ,
A holding portion is provided which holds the relative position of the duct portion and the movable portion in a state where the sealing material is compressed in the duct extending direction by the compression portion.
The holding portion is a first engaging portion provided in the duct portion, and a second engaging portion provided in the movable portion to be separated from the first engaging portion in the duct extending direction The first engaging portion and the second engaging portion by relatively moving the duct portion and the movable portion so as to compress the seal material in the duct extending direction by the compression portion. Configured to be engageable and
The movable portion is provided with an abutting portion capable of abutting on the connection object in the duct extending direction before the sealing material is compressed in the duct extending direction. A duct characterized by Upon sealing with a sealing material between the outer peripheral surface of the connecting portion of the connecting object and an inner peripheral surface of the duct,
A first compression portion and a second compression portion for compressing the seal material in a duct extending direction in a state where the connection portion of the connection object is inserted inside the seal material,
An outer periphery of the connecting portion is provided with a restricting portion that restricts the elastic deformation of the sealing member to the outer peripheral side, and the elastic deformation of the sealing member along with the compression in the duct extending direction by the first and second compression portions. The duct of claim 1 configured to press against a surface . Duct according to claim 2, further comprising a holding portion for holding the first compression unit and the second compression unit in a position for compressing the sealing material to the duct extending direction.

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