JP2001171442A - Hollow chamber shut-off implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hollow chamber shut-off implement usable in either case of fitting or non-fitting a drain hose with improved vibration damping and sound proofing effects. SOLUTION: This hollow chamber shut-off implement 1 for shutting off a hollow part of a hollow structure using a foam member, has a connection port 14a for connecting a drain hose, on one face side, and a drain port 26a on the other face side. A passage from the connection port 14a to the drain port 26a is formed in nonlinear shape by a buffer part formed by a cylindrical part 14, a tapered part 12, a cylindrical part 22, a bottom plate 25 and a small cylinder part 26. In either case of fitting or non-fitting the drain hose, the direct transmission of sound and vibration through the connection port 14a or drain port 26 is thereby prevented to improve soundproofing and vibration damping effects.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow chamber shutoff device for interrupting a hollow portion of a hollow structure halfway for vibration suppression and soundproofing.

[0002]

2. Description of the Related Art A closed space (hollow space) formed by a plurality of panels such as a front pillar, a center pillar, a roof side panel, and a rocker panel of a vehicle body is provided with a blocking member for vibration suppression and soundproofing. Is blocked. The blocker is formed such that a holder for supporting the foamable material is arranged in a predetermined position in advance, and the panel is heated after welding or the like, thereby foaming the foamable material and sealing the cross section of the hollow chamber. Is common. by the way,
In recent years, vehicles equipped with a sunroof on the upper surface of a vehicle body have been increasing. When installing the sunroof, a drain hose is passed from the groove of the sunroof part into the hollow chamber to guide drainage such as rainwater accumulated in the groove of the sunroof part to the lower part of the vehicle body. For this reason, when attaching a sunroof, a hole for a drain hose is provided in the blocking device, and a drainage passage is secured through the blocking device. For the purpose of damping and soundproofing, it is preferable that the hollow chamber be completely shut off. If a body with no sunroof is provided with a drainage passage, good damping can be achieved.・ No soundproofing effect is obtained. However, when different types of blocking devices are provided between when the sunroof is mounted and when the sunroof is not mounted, two types of holders must be manufactured and production controlled.

[0003]

Therefore, in the present invention,
An object of the present invention is to provide a hollow-room shut-off device that can be used both when a drain hose is attached and when it is not attached, and has improved vibration damping and soundproofing effects.

[0004]

In order to solve the above-mentioned problems, the present invention is directed to a hollow chamber shut-off device for shutting off a hollow portion of a hollow structure by a foamable member, wherein a drain hose is connected to one surface side. A connection port is provided, and a drain port is provided on the other surface side, and the connection port and the drain port can be circulated, and a flow path from the connection port to the drain port is formed in a non-linear manner. The present invention provides a hollow-chamber shut-off device characterized by being provided with a shock-absorbing portion. According to this invention, the flow path from the connection port for connecting the drain hose to the drain port is formed non-linearly by the buffer. For this reason, even when the drain hose is not provided, the sound or vibration transmitted through the connection port or the drain port of the drain hose from one space blocked by the blocking device of the present invention collides with the buffer, so that the other space is not provided. Difficult to be transmitted to space. Also, when a drain hose is provided, the sound or vibration transmitted from one space to the inside of the drain hose or to the drain port collides with the buffer portion, and is therefore difficult to be transmitted to the other space.

[0005] The connection port of the present invention is a portion where the drain hose can be fixed at a predetermined location so that the drain hose can be drained through the distribution channel. The connection port may be provided on the blocking surface or may be provided so as to protrude from the blocking surface. In addition, the drain port of the present invention is an opening having a size that allows water to pass well. The drain port may be provided on the blocking surface, or may be provided so as to protrude from the blocking surface. In addition, the number of drain ports is not limited to one, and a plurality of drain ports may be formed. In addition, the buffer section of the present invention forms the flow path from the connection port to the drain port in a non-linear manner, and may be a plate section, a cylindrical section, a curved surface, or anything. The buffer portion may be provided so as to protrude to either one of the blocking members, or may protrude to both. Further, it may be provided in the cross section of the blocking device.

The hollow chamber blocking device of the present invention may be anything as long as the hollow portion is blocked by a foamable member. A blocking device made of only a foam may be used. Further, the holder may have a single-plate-shaped holder that supports the foam on one side, or may have a holder that sandwiches the foam from both sides. The holder is not limited to the one formed integrally, and may be formed separately.

Further, according to the present invention, in the above-mentioned invention,
The cushioning portion has a shape that blocks a circulation path from another space. According to the present invention, since the sound or vibration transmitted through the connection port or the drain port or the drain hose is reflected, absorbed, diffused, or the like in the buffer, the sound or vibration is transmitted from one space to the other space. Not easily transmitted.

[0008]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a hollow chamber blocking device according to an embodiment of the present invention, which includes a foamable member 2 and a pair of plate-shaped holders 4. The hollow chamber blocker 1 blocks a hollow chamber such as a front pillar of a vehicle. FIG. 2 shows a side cross-section when the hollow-chamber blocking device 1 of the present embodiment is provided in a hollow chamber.

As shown in FIGS. 1 and 2, the holder 4
A member having a pair of plate-like portions sandwiching the upper and lower sides of the foamable member 2 and supporting a foamable material before foaming at a predetermined position in the hollow chamber. Placing plate-like objects on the upper and lower sides of the foamable material,
When the foamable material is foamed in the hollow chamber, the foamable material is
Since it is regulated by the upper and lower plate-like objects and spreads in the horizontal direction to the plate-like object, the foamable member 2 reaches the entire periphery of the wall surface of the hollow chamber and satisfactorily blocks the hollow chamber.

The holder 4 has a covering portion 10 constituting an upper plate-like portion and a support portion 20 constituting a lower plate-like portion. ing. The locking portion 6 locks the holder 4 at a predetermined position by locking into a locking hole (not shown) provided at a predetermined position on the peripheral surface of the hollow chamber.

The covering portion 10 has an upper plate 11 that covers the upper side of the foamable member 2, and a tapered portion 12 formed at the center of the upper plate 11 so that the opening area decreases from the upper surface to the lower portion. A cylindrical portion 14 extending vertically downward with respect to the upper plate 11 is provided through the upper portion. The tubular portion 14 has an inside diameter into which a drain hose can be inserted, and an upper end opening of the tubular portion 14 serves as a connection port 14a. In addition, the covering portion 10
A clip hole 16 is provided in the middle of two opposing sides of the clip. Each of the clip holes 16 is engaged with a clip 28 provided on the support portion 20 to fix the covering portion 10 at a predetermined height from the support portion 20 in parallel with the support portion 20.

The support portion 20 has a lower plate 21 for supporting the foamable member 2, and the cylindrical portion 14 of the upper plate 11 is provided at the center of the lower plate 21.
A cylindrical portion 22 having a larger diameter is provided perpendicular to the lower plate 21. The tubular portion 22 protrudes above the lower plate 21 by the height up to the covering portion 10 and extends long below the lower plate 21. The support portion 20 has two clips 28 extending vertically upward from the lower plate 21 at a portion facing the clip hole 16 of the covering portion 10. The clip 28 has a flexible portion 28a at the distal end, bends when passing through the clip hole 16, returns to the original position on the upper surface side of the clip hole 16, and stably holds the covering portion 10. Also, the clip 2 of the support portion 20
A plate 24 extending vertically upward is provided at one end edge on the side where the 8 is not provided, and the locking portion 6 is provided so as to protrude outward.

The lower end of the cylindrical portion 22 is closed by a bottom plate 25. In the lower end opening of the cylindrical portion 22, a portion that is not directly below the opening of the cylindrical portion 14 of the covering portion 10 includes:
A small tube portion 26 is provided in communication with the inside of the tube portion 22. The lower end opening of the small cylinder portion 26 is a drain port 26a. In the present embodiment, the tubular portion 14, the tapered portion 12, the tubular portion 22, the bottom plate 25, and the small tubular portion 26 form a buffer portion of the present invention. The buffer has a shape that blocks the flow path and the lower space that is blocked.

When a drain hose is not provided in this hollow chamber blocking device, a lower portion of the connection port 14a is closed by a bottom plate 25 as shown in FIG. Therefore, the connection port 14a
Alternatively, sound or vibration passing through the cylindrical portion 14 or the small cylindrical portion 26 from the drain port 26a hits the inner surface of the buffer portion (12, 13, 22, 25, 26) and is reflected or attenuated. For this reason, sound and vibration transmitted from the space on one surface side are not directly transmitted to the space on the other surface side, and the vibration suppression and soundproofing effects can be improved. For example, the sound or vibration passing through the connecting port 14a and passing through the tubular portion 14 from above to below hits the bottom plate 25 or the tubular portion 22, is reflected or absorbed, and passes through the small tubular portion 26. Only the sound or vibration transmitted to the drain 26a is transmitted to the lower space. The sound and vibration passing through the small cylinder portion 26 from the bottom through the drain port 26a are generated by the lower plate 21.
Only the one that hits the lower surface or the cylindrical portion 22 or the outer surface of the cylindrical portion 14 and is reflected or absorbed, and transmitted to the connection port 14a through the cylindrical portion 14 is in the upper space. Is transmitted.

When a drain hose is provided in the hollow chamber closing device, the drain hose is passed through the inside of the cylindrical portion 14 from the connection port 14a as shown by an imaginary line in FIG. Is provided so as to extend below the lower end of the cylindrical portion 14. Therefore, the foamable member 2 and the holder 4
And the drain hose can satisfactorily shut off the hollow chamber. The drain hose is passed down along the cylindrical portion 14, and the lower part of the lower end opening is closed by the bottom plate 25. For this reason, the sound and vibration that have passed through the inside of the drain hose can also be reflected and absorbed by the buffer, and can be hardly transmitted to the lower space.

In the present invention, the bottom of the bottom plate 2 is
By closing with 5, even when a drain hose is not provided, a soundproofing / damping effect can be obtained. When a drain hose is provided, the drainage can be satisfactorily drained from the connection port 14a to the drainage port 26a through the buffer portion, and the soundproofing / damping effect can be obtained by the hollow chamber blocker and the drain hose. . For this reason, the hollow chamber blocking device of the present embodiment,
It can be used both with and without a drain hose. Further, in the present embodiment, since the buffer unit blocks the entire flow path from the connection port 14a to the drain port 26a from other spaces, the soundproofing / damping effect is higher. Further, in the present embodiment, when the drain hose is inserted, the sound and vibration transmitted through the inside of the drain hose also pass through the buffer portion, so that the soundproofing / damping effect is higher.

FIG. 3 shows a modification of this embodiment. In this hollow chamber blocking device, the lower end opening of the cylindrical portion 22 of the support portion 20 is completely shielded by the bottom plate, and holes 36 are formed at equal intervals on the peripheral surface near the lower end opening of the cylindrical portion 22. Is provided.
These four holes 36 are drains of the present embodiment. The other parts shown in FIG. 3 are the same as those in the embodiment of FIG. In the hollow chamber blocking device of this embodiment, the opening directions of the connection port 14a and the hole 36 (drain port) are different. For this reason, it is difficult for the sound or vibration that has passed through the cylindrical portion 14 or the drain hose passed through the cylindrical portion 14 or the hole 36 to be directly transmitted to the lower or upper space, and the soundproofing / damping effect can be obtained. .

FIG. 4 shows another embodiment. FIG.
Is a hollow chamber blocking device having a holder 54 in which a pair of plate-shaped portions are integrally formed, and an upper plate 61 and a lower plate 71 are connected via a cylindrical portion 64 formed through each central portion. It is integrally molded. The cylindrical portion 64 has a cylindrical shape having an inner diameter large enough to allow a drain hose to be inserted, and has a lower end opening at the bottom plate 6.
Blocked by 5. The upper end opening of the cylindrical portion 64 is
It is a connection port 64a. Further, the bottom plate 65 is partially cut out from the inner peripheral surface of the cylindrical portion 64 and is open.
A drain port 65a is formed.

In the hollow chamber blocking device of this embodiment, the connection port 64a
The flow path from the drainage port 65a to the drainage port 65a is linear from a part of the connection port 64a occupying the portion directly above the drainage port 65a to the drainage port 65a, but is substantially non-linear in other parts. For this reason, a soundproofing / damping effect can be obtained regardless of whether the drain hose is attached or not. As described above, in the hollow chamber blocking device of the present invention, even if the flow path from the connection port to the drain port is partially formed in a straight line, the space from one surface side of the blocking device to the other The sound and vibration transmitted directly to the space can be reduced, so that it has a soundproofing / damping effect.

The present invention is not limited to the above embodiment.
The hollow portion to which the hollow chamber blocking device is attached is not limited to a part of the vehicle. It can be attached to the hollow portion of any hollow structure, and is particularly suitable for blocking a substantially cylindrical space.

The form of the buffer is not limited to the above. Any shape may be used as long as the flow path from the connection port to the drain port can be formed non-linearly. In other words, a range in accordance with the purpose of the buffer portion is that water that has passed through the drain hose is circulated while vibration and sound are not transmitted directly from the space on one surface side of the shut-off device to the space on the other surface side. Can be changed as appropriate. It can be formed into a tubular portion that extends straight, a tubular portion having a bent portion, or a meandering tubular portion. Further, it may be formed in a spiral shape or a screw shape. The shape is not limited to a cylindrical shape, and may be, for example, a box shape or a bowl shape. Alternatively, it may be a plate-like object that blocks only directly below the connection port. Further, the plate-like object is not limited to a flat surface, and may be a curved surface. For example, a curved surface may be used in which a portion immediately below the connection port is shielded and a curved surface having an appropriately changed curvature is extended in the direction of the inner peripheral surface of the hollow chamber. By forming the buffer portion in such a shape, water from the drain hose can be circulated below the shutoff device, and sound and vibration can be directly transmitted from the space on one surface side to the space on the other surface side. It is possible to improve the soundproofing / damping effect without any commercial distribution.

Preferably, the buffer portion is formed in a shape that blocks the entire flow path from the connection port to the drain port from other spaces in the hollow portion. In this case, the buffer portion may be a substantially closed space such as a cylindrical shape, a box shape, or the like formed in the hollow chamber blocking device,
It may be a substantially closed space formed by the curved surface portion protruding from the foamable member portion and the peripheral surface of the hollow chamber. By blocking the entire flow path from the connection port to the drain port by the buffer section, sound and vibration can be reflected / absorbed or interfered with or interfere with each other, so that a higher soundproofing / damping effect can be achieved.

The position of the buffer may be below or above the foamable member. Also, as shown in FIG.
It may be formed on both. When the buffer portion is formed only above, the connection port is formed above the buffer portion, and the drain port is formed on the lower surface side of the foamable member.

The connection port is not limited to the upper end opening of the circular cylindrical portion. For example, when the holder is provided on both the upper and lower surfaces of the foamable member, the upper surface and the lower surface of the holder surface may be formed in a tapered shape to form a hole. In addition, the connection port may not be opened perpendicularly to the foamable member, and may be formed obliquely. Further, the position of the connection port is not limited to substantially the center of the cross section of the hollow chamber, but may be formed anywhere. In particular, when the buffer portion protrudes above the foamable member, the connection port is not limited to a hole, and may be formed in a concave shape through which a drain hose can be hung. Further, as described above, in the case where the buffer portion is a substantially closed space formed by the curved surface portion and the peripheral surface of the hollow chamber which are in close contact with the inner peripheral surface of the hollow chamber, the connection port is formed of a blocking member having a concave shape. It may be a hole formed by the curved surface portion and the inner peripheral surface of the hollow chamber. The size of the connection port may be any size as long as the drain hose can be inserted.

The drain port is not limited to an opening at the lower end of the cylindrical portion or a hole, but may be any opening portion having a size that allows water to pass therethrough. For example, it may be formed in a slit shape. When the buffer is formed in a plate shape,
The entire clearance between the connection port and the plate-shaped buffer portion may be used. Further, a plurality of drain ports may be provided.

[0026]

According to the present invention, it is possible to provide a hollow-room shut-off device which can be used both when a drain hose is attached and when it is not attached, and has improved vibration damping and soundproofing effects.

[Brief description of the drawings]

FIG. 1 is a perspective view of a hollow chamber blocking device according to the present embodiment.

FIG. 2 is a side sectional view of the hollow chamber blocking device of FIG. 1;

FIG. 3 is a perspective view of a modified example of the hollow chamber blocking device of the present embodiment.

FIG. 4 is a side cross-sectional view of a hollow-chamber blocking device according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hollow chamber blocker 2 Foamable member 4 Holder 6 Locking part 10 Covering part 11, 61 Upper plate 12 Tapered part 14 64 Cylindrical part 14a, 64a Connection port 16 Clip hole 20 Support part 21, 71 Lower plate 22 Cylindrical Part 24 plate body 25 bottom plate 26 small cylinder part 26a, 36a, 65a drain port 28 clip

Claims (2)

[Claims] 1. A hollow chamber blocking device for blocking a hollow portion of a hollow structure by a foamable member, wherein a connection port for connecting a drain hose is provided on one surface side, and a drain port is provided on the other surface side. A hollow chamber characterized by being provided, the connection port and the drain port being able to flow, and being provided with a buffer portion that forms a non-linear flow path from the connection port to the drain port. Blocker. 2. The hollow chamber shut-off device according to claim 1, wherein
The said hollow part is a shape which interrupts | blocks a circulation path from another space, The hollow-chamber shutoff tool characterized by the above-mentioned.