JP6769155B2 - Packing - Google Patents

Description

The present invention has a first tube having a large diameter first through hole having a non-circular shape having a long axis and a short axis, and a non-circular shape having a long axis and a short axis, which are arranged opposite to each other. The present invention relates to a packing for connecting to a second tubular body having a second through hole having a small diameter.

Non-circular holes having a major axis and a minor axis, such as an oval shape, an elliptical shape, or a rounded rectangle, are used as through holes for inserting wirings and pipes (for example, in order to save space). , Refer to the through hole 5 of Patent Document 1 and the through hole 11 of Patent Document 2 as an oval-shaped through hole).
Here, the seal structure of the automobile piping of Patent Document 2 includes the inner piping 4 inside the cooler unit case 2 attached to the vehicle interior side of the dash panel 1 that separates the vehicle interior CR and the vehicle interior ER, and the outside of the vehicle interior. The outer pipe 7 of another device is connected by a block connector 6 for connecting pipes, which has an oval shape in the radial direction. Then, the seal base 12 of the packing material 10 made of EPDM, which has an oval ring shape and is held by the block connector 6 via the protrusion 14 that contacts the outer peripheral surface of the block connector 6, is passed through the oval-shaped through hole of the panel 1. It is sandwiched between the panel 1 and the case 2 at the radial outer positions of the oval-shaped openings 2a of the 11 and the case 2.

Utility Model Registration No. 2530435 JP-A-10-86651

The packing material 10 in the sealing structure as in Patent Document 2 maintains the sealing property by sandwiching the front and rear of the sealing base 12 in the axial direction between the dash panel 1 and the cooler unit case 2, so that the shaft between the members to be connected is maintained. When the relative misalignment in the direction is large, it is difficult to absorb the misalignment.
In addition, a first tube having a non-circular large-diameter first through hole having a major axis and a minor axis and a non-circular shape having a major axis and a minor axis arranged opposite to each other. When connecting a second pipe body having a second through hole having a small diameter with a packing to form a flow path for a liquid or gas, the packing material made of EPDM having a structure as in Patent Document 2 has a high internal fluid pressure. In some cases, or when a high fluid pressure such as a high-pressure washer is applied from the outside, the sealing property may not be maintained.

Therefore, in view of the above-mentioned situation, the present invention tries to solve the problem of a first tube having a large-diameter first through hole having a non-circular shape having a long axis and a short axis, which are arranged so as to face each other. And, in the packing connecting the second pipe body having the second through hole of the non-circular shape having the major axis and the minor axis, the relative displacement in the radial direction and the relative displacement in the axial direction are absorbed. At the same time, it is possible to provide a packing that can maintain the sealing property even when the internal fluid pressure is high or when a high fluid pressure is applied from the outside.

The packing according to the present invention is used to solve the above problems.
A first tubular body having a non-circular large-diameter first through hole having a major axis and a minor axis and a non-circular small-diameter first tube having a major axis and a minor axis arranged opposite to each other. A packing for connecting to a second tube having two holes.
In the connection portion between the first tube body and the second tube body, the tube portion of the second tube body is inserted into the first through hole of the first tube body.
A first including a first metal core metal and a rubber first coating material covering the first core metal, which are fitted to the inner peripheral surface of the wall forming the first through hole of the first tube body. With the connection
A second connecting body including a metal second core metal and a rubber second coating body covering the second core metal, which is fitted to the outer peripheral surface of the tube portion of the second tube body.
Connecting said first connecting member and the second connecting member, and the rubber coupling body Ru integrally der and the first cover member and the second cover member,
Equipped with a,
The connected body
The first connecting body fits into the inner peripheral surface of the wall forming the first through hole of the first pipe body, and the second connecting body fits into the outer peripheral surface of the pipe portion of the second pipe body. Matched
The usage condition of the packing and
The first connecting body does not fit on the inner peripheral surface of the wall forming the first through hole of the first pipe body, and the second connecting body fits on the outer peripheral surface of the pipe portion of the second pipe body. Does not fit
Unused state of the packing
In both states
It is characterized in that the cross section cut in a plane including the axial direction and the radial direction is substantially U-shaped .

According to such a configuration, when the first connecting body is fitted to the inner peripheral surface of the wall forming the first through hole of the first tube body, the first metal core metal of the first connecting body is formed. The rubber first covering surface covering the first core metal is pressed against the inner peripheral surface of the wall forming the first through hole of the first tubular body, and the rubber first covering body is formed on the inner peripheral surface. Adhere to.
Further, in a state where the second connecting body is fitted to the outer peripheral surface of the pipe portion of the second pipe body, the second metal coating of the second connecting body is covered with the second core metal made of rubber. The second covering surface made of rubber is brought into close contact with the outer peripheral surface by pressing the outer peripheral surface of the tube portion of the second tubular body through the body.
Therefore, the sealing property can be maintained even when the internal fluid pressure is high or when a high fluid pressure is applied from the outside.

Further, the cross section cut in a plane including the axial direction and the radial direction, which is integrated with the rubber first covering body of the first connecting body and the rubber second covering body of the second connecting body, is substantially U-shaped. The first connecting body and the second connecting body are connected by the rubber connecting body of.
Therefore, when assembling the first pipe body and the second pipe body, the position shift in various directions such as the relative position shift in the radial direction, the relative position shift in the axial direction, and the relative position shift in the tilting direction can be obtained. , It can be absorbed by the elastic deformation of the rubber connecting body having the above shape.
Furthermore, even when the first tube and the second tube between the electromechanical devices are connected by packing, the radial vibration and the axial vibration are constantly loaded in the operating state of the electromechanical device. , And vibration in various directions such as vibration in the tilting direction can be absorbed by elastic deformation of the rubber connecting body having the above-mentioned shape.

Here, the first core metal has a first tubular portion and the first tubular portion that are attached to the inner peripheral surface of the wall forming the first through hole of the first tubular body via the first covering body. A cross section cut in a plane including the axial direction and the radial direction, including the first flange portion extending outward in the radial direction, which is attached to the axial end face of one pipe body via the first covering body, is substantially L-shaped. It is a shape
The second core metal includes a second tubular portion that is attached to the outer peripheral surface of the tubular portion of the second tubular body via the second covering body, and a second flange portion that extends outward in the radial direction. It is preferable that the cross section cut in a plane including the axial direction and the radial direction is substantially L-shaped.
According to such a configuration, since the cross section of the first core metal and the second core metal cut in a plane including the axial direction and the radial direction is substantially L-shaped, the first core metal and the second core metal have a substantially L-shaped cross section. The radial rigidity is increased.
Therefore, even when the internal fluid pressure or the fluid pressure applied from the outside is higher, the first core metal and the second core metal are less likely to be deformed in the radial direction, so that the sealing property is further improved.
Moreover, since the first flange portion of the first core metal is aligned with the axial end surface of the first tubular body via the first covering body, the packing can be positioned in the axial direction.

Further, the portion of the first covering body that covers the outer peripheral surface of the first cylinder portion has a peripheral groove on the outer peripheral surface thereof and covers the inner peripheral surface of the second cylinder portion of the second covering body. Is more preferably provided with a peripheral groove on its inner peripheral surface.
According to such a configuration, the first rubber covering having a peripheral groove on the outer peripheral surface adheres to the inner peripheral surface of the wall forming the first through hole of the first tubular body in a state where the surface pressure is higher. At the same time, the rubber second covering having a peripheral groove on the inner peripheral surface adheres to the outer peripheral surface of the pipe portion of the second pipe body in a state where the surface pressure is higher, so that the fluid is hung from the inside or the outside. Since the sealing action against the pressure fluctuation of the fluid is stable, the sealing property is further improved.

Further, it is more preferable that the portion of the first covering body that covers the first flange portion includes a lip that projects toward the axial end surface of the first tubular body.
According to such a configuration, a wedge-shaped cross-sectional lip of the rubber first coating body covering the first flange portion of the first core metal projecting toward the axial end face of the first tubular body. Is pressed against the axial end face of the first tubular body, so that the sealing action against pressure fluctuations of the fluid inside and the fluid applied from the outside is further stabilized, so that the sealing property is further improved.

As described above, according to the packing according to the present invention, the following effects are mainly exhibited.
(1) The inner peripheral surface of the wall in which the metal first core of the first connector forms the first through hole of the first tube through the rubber first coating that covers the first core. The metal second core of the second connector presses against the outer peripheral surface of the tube portion of the second tube via the rubber second coating that covers the second core. Even when the internal fluid pressure is high or when a high fluid pressure is applied from the outside, the sealing property can be maintained.
(2) Positional deviations in various directions such as relative positional deviations in the radial direction, relative positional deviations in the axial direction, and relative positional deviations in the tilting direction when the first tube body and the second tube body are assembled. The cross section is substantially U-shaped cut in a plane including the axial direction and the radial direction, which is integrated with the rubber first covering body of the first connecting body and the rubber second covering body of the second connecting body. It can be absorbed by the elastic deformation of the rubber connecting body.
(3) Even when the first tube and the second tube between the electromechanical devices are connected by packing, the radial vibration and the axial vibration, which are constantly loaded in the operating state of the electromechanical device, And vibrations in various directions such as vibrations in the tilting direction can be absorbed by elastic deformation of the rubber connecting body having the above-mentioned shape.

In (a), the packing according to the embodiment of the present invention is a non-circular first tube body having a large-diameter first through hole having a major axis and a minor axis, and a non-circular body having a major axis and a minor axis. A vertical cross-sectional side view showing a state of being attached to a connecting portion of a second pipe body having a second through hole having a small diameter in shape, (b) is also an enlarged vertical cross-sectional side view of a main part. It is a partial longitudinal sectional perspective view which shows the packing which concerns on embodiment of this invention. (A) is a front view showing the packing according to the embodiment of the present invention, and (b) is also a rear view. It is a front view which shows only the 1st core metal and the 2nd core metal. (A) is an end view of the AA line cut portion in FIG. 3 (a), (b) is an end view of the BB line cut portion in FIG. 3 (a), and (c) is C- in FIG. 3 (a). It is a C line cut portion end view. (A) is a sectional view taken along line XX in FIG. 3 (b), and FIG. 3 (b) is a sectional view taken along line YY in FIG. 3 (b).

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to the embodiments shown in the attached drawings, and includes all embodiments that satisfy the requirements described in the claims. It is a waste.
The "non-circular shape having a major axis and a minor axis" in the present invention is an oval shape (a shape in which two circles having the same radius are connected by a common circumscribed line), an ellipse shape, a rounded rectangle, or the like, or these shapes. Includes a shape close to.
In the present specification, the conduit direction of the first tube and the second tube is defined as "axial direction", and the direction orthogonal to the axial direction is defined as "diametrical direction", and the direction from the second tube to the first tube is defined. The view seen from the axial direction is taken as the front view.

As shown in the vertical sectional side view of FIG. 1A and the enlarged vertical sectional side view of the main part of FIG. 1B, the packings 10 according to the embodiment of the present invention are arranged so as to face each other. It has a first tubular body T1 having a non-circular large-diameter first through hole A having a major axis and a minor axis, and a non-circular small-diameter second through hole B having a major axis and a minor axis. It connects to the second tube body T2.
In the connecting portion C of the first tubular body T1 and the second tubular body T2, the tubular portion D of the second tubular body T2 is inserted into the first through hole A of the first tubular body T1.
Here, the first through hole A and the second through hole B are, for example, oval (a shape in which two circles having the same radius are connected by a common circumscribed line).

A vertical sectional side view of FIG. 1A, an enlarged vertical sectional side view of a main part of FIG. 1B, a partial vertical sectional perspective view of FIG. 2, a front view of FIG. 3A, and FIG. 3 ( As shown in the rear view of b), the packing 10 is fitted to the inner peripheral surface E of the wall forming the first through hole A of the first tubular body T1, and the first connecting body 1 and the second tubular body T2. The second connecting body 2 fitted to the outer peripheral surface G of the pipe portion D, and the cross section cut by the plane including the axial direction and the radial direction connecting the first connecting body 1 and the second connecting body 2 are substantially U-shaped. A rubber-shaped connecting body 3 is provided.
The first connecting body 1 includes a metal first core metal 11 and a rubber first covering body 4 that covers the first core metal 11, and the second connecting body 2 is a metal second core metal 12 And a rubber second covering body 5 for covering the second core metal 12.
The connecting body 3 is integrally molded with the rubber first covering body 4 of the first connecting body 1 and the rubber second covering body 5 of the second connecting body 2.

The first core metal 11 and the second core metal 12 are made of metal such as stainless steel and are formed by press working.
Further, the rubber first covering body 4 and the second covering body 5 are vulcanized and adhered to the first core metal 11 and the second core metal 12 to be integrated.

For vulcanization adhesion of the rubber first covering body 4 and the second covering body 5 to the metal cores 11 and 12, a thermosetting resin adhesive is applied to a predetermined range on the surface of the metal cores 11 and 12. It can be performed by direct pressure molding (compression (vulcanization) molding) in which the core molds 11 and 12 are set in the coated and heated lower mold, and the upper mold is closed to pressurize and cure the raw rubber material. ..
Alternatively, in the vulcanization adhesion, a thermosetting resin adhesive is applied to a predetermined range on the surface of the metal cores 11 and 12, the cores 11 and 12 are set in the lower mold, and the upper mold is closed. In this state, it can also be performed by injection molding (injection molding) in which the cavity is filled with a liquefied raw rubber material.

As the thermosetting resin adhesive, general vulcanization adhesives for rubber such as phenol resin adhesives and silane adhesives can be used.
As the rubber material, nitrile rubber (NBR), hydride nitrile rubber (HNBR), acrylic rubber (ACM), ethylene / acrylic rubber (AEM), and fluororubber (FKM) are used as rubber materials having good oil resistance. , FPM), silicone rubber (VQM) and other rubbers, one type or two or more types of rubber can be appropriately blended and used.
In addition, considering the kneading processability, vulcanization formability, and adhesiveness of the rubber material to the core metals 2 and 3, other types of rubber, such as liquid NBR, ethylene propylene rubber (EPDM), and natural rubber (NR). , Isoprene rubber (IR), styrene-butadiene rubber (SBR), butadiene rubber (BR) and the like are also preferably blended and used.

Front view of FIG. 4, end view of the cut portion taken along the line AA in FIG. 3 (a) of FIG. 5 (a), end view of the cut portion taken along the line BB in FIG. 3 (a) of FIG. As shown in the end view of the CC line cut portion in FIG. 3 (a) of 5 (c), the first core metal 11 of the first connecting body 1 extends outward in the first tubular portion 11A and the radial direction. The second core metal 12 of the second connecting body 2 is composed of the first flange portion 11B and the second core metal 12 is composed of the second cylinder portion 12A and the second flange portion 12B extending outward in the radial direction, and is composed of the first core metal 11 and the second core metal. No. 12 has a substantially L-shaped cross section cut in a plane including the axial direction and the radial direction.
As described above, since the cross section of the first core metal 11 and the second core metal 12 cut in a plane including the axial direction and the radial direction is substantially L-shaped, the first core metal 11 and the second core metal 12 have a substantially L-shaped cross section. The radial rigidity is increased.
Therefore, even when the internal fluid pressure or the fluid pressure applied from the outside is higher, the first core metal 11 and the second core metal 12 are less likely to be deformed in the radial direction.

As shown in the vertical sectional side view of FIG. 1 (a), the enlarged vertical sectional side view of the main part of FIG. 1 (b), and the end view of FIGS. 5 (a) to 5 (c), the first core metal The first tubular portion 11A of 11 has a rubber first covering body 4 that covers the first core metal 11 with respect to the inner peripheral surface E of the wall forming the first through hole A of the first tubular body T1. The first flange portion 11B of the first core metal 11 is provided via a rubber first covering body 4 that covers the first core metal 11 with respect to the axial end surface F of the first tube body T1. Accompany.
In this way, the first flange portion 11B of the first core metal 11 is aligned with the axial end surface F of the first tubular body T1 via the first covering body 4, so that the packing 10 can be positioned in the axial direction.
Further, the second tubular portion 12A of the second core metal 12 passes through a rubber second covering body 5 that covers the second core metal 12 with respect to the outer peripheral surface G of the pipe portion D of the second tubular body T2. Follow me.

A non-circular shape having a long axis and a short axis, such as the packing 10 shown in the partial vertical sectional perspective view of FIG. 2, the front view of FIG. 3 (a), and the rear view of FIG. 3 (b), is long. It is known that a linear portion substantially parallel to an axis is easily deformed in the radial direction (see, for example, paragraph [0004] of Patent Document 1 and paragraph [0026] of Patent Document 2).
Therefore, as shown in the front view of FIG. 4, the linear portion of the first core metal 11 is formed in the radial direction by forming the first tubular portion 11A of the first core metal 11 in an elliptical shape in the axial direction. The linear portion of the second core metal 12 is deformed radially outward by forming the second tubular portion 12A of the second core metal 12 into an axially cocoon shape while making it difficult to deform in the direction. It's difficult.

A partial vertical sectional perspective view of FIG. 2, an end view of FIGS. 5 (a) to 5 (c), a sectional view taken along line XX in FIG. 3 (b) of FIG. 6 (a), and FIG. 6 (b). ), As shown in the cross-sectional view taken along the line YY in FIG. 3 (b), the portion 4A covering the outer peripheral surface of the first tubular portion 11A of the first covering body 4 has peripheral grooves 6 and 7 on the outer peripheral surface. The portion 5A that covers the inner peripheral surface of the second tubular portion 12A of the second covering body 5 is provided with a peripheral groove 8 on the inner peripheral surface thereof.
Therefore, the rubber first covering body 4 having the peripheral grooves 6 and 7 on the outer peripheral surface forms the first through hole A of the first tubular body T1 shown in FIGS. 1A and 1B. A rubber second covering body 5 having a peripheral groove 8 on the inner peripheral surface while being in close contact with the inner peripheral surface E of the wall in a state where the surface pressure is higher is shown in FIGS. 1 (a) and 1 (b). Since the second tubular body T2 is brought into close contact with the outer peripheral surface G of the tubular portion D in a state where the surface pressure is higher, the sealing action against pressure fluctuations of the internal fluid and the fluid applied from the outside is stable.

Further, the portion 4B covering the first flange portion 11B of the first covering body 4 includes a lip 9 projecting toward the axial end surface F of the first tubular body T1.
Therefore, on the axial end surface F of the first tubular body T1 shown in FIGS. 1A and 1B of the rubber first covering body 4 covering the first flange portion 11B of the first core metal 11. Since the wedge-shaped cross-sectional lip 9 protruding toward the surface is pressed against the axial end surface F of the first tubular body T1, the sealing action against pressure fluctuations of the internal fluid and the fluid applied from the outside is further stabilized.

According to the packing 10 having the above configuration, when the first connecting body 1 is fitted to the inner peripheral surface E of the wall forming the first through hole A of the first tubular body T1, the first connecting body 1 The metal first core metal 11 forms the inner peripheral surface E of the wall forming the first through hole A of the first tube body T1 via the rubber first coating body 4 that covers the first core metal 11. The first covering body 4 made of rubber is brought into close contact with the inner peripheral surface E by pressure contact.
Further, in a state where the second connecting body 2 is fitted to the outer peripheral surface G of the pipe portion D of the second pipe body T2, the metal second core metal 12 of the second connecting body 2 covers the second core metal 12. The rubber second covering body 5 is in close contact with the outer peripheral surface G of the pipe portion D of the second pipe body T2 via the rubber second covering body 5.
Therefore, the sealing property can be maintained even when the internal fluid pressure is high or when a high fluid pressure is applied from the outside.

Further, a cross section cut along a plane including the axial direction and the radial direction, which is integrated with the rubber first covering body 4 of the first connecting body 1 and the rubber second covering body 5 of the second connecting body 2. The first connecting body 1 and the second connecting body 2 are connected by a substantially U-shaped rubber connecting body 3.
Therefore, when the first pipe body T1 and the second pipe body T2 are assembled, the positions in various directions such as the relative position shift in the radial direction, the relative position shift in the axial direction, and the relative position shift in the tilt direction. The deviation can be absorbed by the elastic deformation of the rubber connecting body 3 having the above shape.
Furthermore, even when the first tubular body T1 and the second tubular body T2 between the electromechanical devices are connected by the packing 10, the radial vibration and the shaft are constantly loaded in the operating state of the electromechanical device. Vibrations in various directions, such as vibrations in the direction and vibrations in the tilting direction, can be absorbed by elastic deformation of the rubber connecting body 3 having the above-mentioned shape.

1 1st connecting body 2 2nd connecting body 3 Connecting body 4 1st covering body 4A Part covering the outer peripheral surface of the 1st cylinder part of the 1st covering body 4B Part covering the 1st flange part of the 1st covering body 5th 2 Cover 5A Parts that cover the inner peripheral surface of the second cylinder of the second cover 6, 7, 8 Circumferential grooves 9 Lips 10 Packing 11 1st core metal 11A 1st cylinder 11B 1st flange 12 2nd core 12A 2nd cylinder 12B 2nd flange A 1st through hole B 2nd through hole C Connection part D Pipe part E Inner peripheral surface F Axial end surface G Outer surface surface T1 1st pipe body T2 2nd pipe body

Claims (4)

A first tubular body having a non-circular large-diameter first through hole having a major axis and a minor axis and a non-circular small-diameter first tube having a major axis and a minor axis arranged opposite to each other. A packing for connecting to a second tube having two holes.
In the connection portion between the first tube body and the second tube body, the tube portion of the second tube body is inserted into the first through hole of the first tube body.
A first including a first metal core metal and a rubber first coating material covering the first core metal, which are fitted to the inner peripheral surface of the wall forming the first through hole of the first tube body. With the connection
A second connecting body including a metal second core metal and a rubber second coating body covering the second core metal, which is fitted to the outer peripheral surface of the tube portion of the second tube body.
Connecting said first connecting member and the second connecting member, and the rubber coupling body Ru integrally der and the first cover member and the second cover member,
Equipped with a,
The connected body
The first connecting body fits into the inner peripheral surface of the wall forming the first through hole of the first pipe body, and the second connecting body fits into the outer peripheral surface of the pipe portion of the second pipe body. Matched
The usage condition of the packing and
The first connecting body does not fit on the inner peripheral surface of the wall forming the first through hole of the first pipe body, and the second connecting body fits on the outer peripheral surface of the pipe portion of the second pipe body. Does not fit
Unused state of the packing
In both states
A packing characterized in that the cross section cut in a plane including the axial direction and the radial direction is substantially U-shaped .
The first core metal is
The first tubular portion and the inner peripheral surface of the wall forming the first through hole of the first tubular body via the first covering body, and
A first flange portion extending outward in the radial direction, which is attached to the axial end surface of the first tubular body via the first covering body, is included.
The cross section cut in a plane including the axial direction and the radial direction is substantially L-shaped.
The second core metal is
The second tubular portion and the second tubular portion that are attached to the outer peripheral surface of the tubular portion of the second tubular body via the second covering body, and
Includes a second flange extending radially outward,
The cross section cut in a plane including the axial direction and the radial direction is substantially L-shaped.
The packing according to claim 1. The portion of the first covering body that covers the outer peripheral surface of the first cylinder portion is provided with a peripheral groove on the outer peripheral surface thereof.
The portion of the second covering body that covers the inner peripheral surface of the second tubular portion is provided with a peripheral groove on the inner peripheral surface thereof.
The packing according to claim 2. The portion of the first covering body that covers the first flange portion includes a lip that projects toward the axial end surface of the first tubular body.
The packing according to claim 2 or 3.

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