JP4166385B2 - Hollow chamber breaker in hollow structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a hollow chamber breaker in a hollow structure, and is mainly used for damping and soundproofing of hollow panels such as pillars, rocker panels, roof side panels, etc. of vehicle bodies that are configured in a hollow box-shaped closed section mainly by a plurality of panels. The present invention relates to a hollow chamber barrier in a hollow structure for enhancing the above.
[0002]
[Prior art]
For example, JP-A-8-276448 discloses a hollow chamber barrier in this type of hollow structure.
In such a hollow chamber breaker in a hollow structure, a holder body attached to the hollow chamber of the hollow structure, and supported by the holder body and foamed by external heating to become a foamed body, thereby blocking the hollow chamber. And a foamable substrate. The holder body includes a holder plate for supporting at least one side surface of the foamable base material and regulating foaming of the foamable base material.
[0003]
Further, in the hollow panel of the vehicle body as a hollow structure, for example, when blocking the hollow chamber of the hollow panel at the boundary between the center pillar and the rocker panel, the holder plate is a main body plate portion that is substantially orthogonal to the hollow chamber. And an overhanging portion bent at a predetermined angle from at least one side of the main body plate portion and extending toward the side wall surface of the hollow chamber.
In such a case, when the foamable base material is formed in a flat plate shape, it becomes difficult to support the foamable base material along the bent shape of the holder plate.
For this reason, the foamable substrate is also formed in a required bent shape corresponding to the bent shape of the holder plate.
On the other hand, the hollow panel at the boundary between the center pillar of the vehicle body and the rocker panel is symmetrical in the left side portion and the right side portion of the vehicle body, and correspondingly, the holder body is formed symmetrically. Each one is used.
And also in a foamable base material, what was formed symmetrically corresponding to the bending shape of each holder plate of a symmetrical holder body is used, respectively.
[0004]
[Problems to be solved by the invention]
By the way, in the hollow chamber breaker in the conventional hollow structure, the foamable base material is formed into a desired shape by injecting a synthetic resin material mixed with a foaming agent into the cavity of the mold.
Therefore, in order to obtain a foamable base material having a symmetrically bent shape, a mold for forming a foamable base material for the left side and a mold for forming a foamable base material for the right side Must be produced respectively. For this reason, the manufacturing cost of a shaping | molding die became high, and there existed a problem which became expensive.
[0005]
In view of the above-described conventional problems, an object of the present invention is to provide a hollow chamber breaker that can be used in combination with left and right foaming substrates, and can reduce the manufacturing cost accordingly. .
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the hollow chamber blocker in the hollow structure according to the first aspect of the present invention is summarized as follows.
Accordingly, the foamable base material is deformed and held in the bent deformation portion at the bent portion at the boundary portion between the main body plate portion and the overhang portion of the holder plate, so that the expandability of the holder plate with respect to the overhang portion of the holder plate. The substrate is securely held without being lifted.
That is, the foamable base material can be used in common with the holder plate of the holder body formed symmetrically on the structure in which the foamable base material is deformed in an arbitrary direction at the bending deformation portion. .
For this reason, unlike conventional models, a bent foamable base material corresponding to the left holder body and a bent foamable base material corresponding to the right holder body are manufactured using dedicated molds. Can eliminate the need to do.
[0007]
Moreover, the hollow chamber circuit breaker in the hollow structure according to the second invention is characterized by the configuration as described in claim 2, and the bending deformation portion of the foamable base material is formed on the bending portion of the holder plate. It is comprised by the thin part formed in the foamable base material along.
The hollow chamber breaker in the hollow structure according to the third aspect of the present invention is characterized in that the configuration as described in claim 3 is provided, and the bending deformation portion of the foamable substrate is along the bending portion of the holder plate. It is comprised by the required number of punch holes formed in the foamable base material.
[0008]
The hollow chamber breaker in the hollow structure according to the fourth invention is characterized by the configuration as described in claim 4, and the bending deformation portion of the foamable base material is along the bending portion of the holder plate. It is comprised by the combination of the thin part formed in the said foamable base material, and the punching hole.
Therefore, even when the radius of curvature of the bent portion of the holder plate is small and the bending angle is large, the bent deformation portion of the foamable substrate is favorably bent and deformed along the bent portion. For this reason, the malfunction that a foaming base material breaks in the bending deformation part can be prevented.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
In this embodiment, as shown in FIG. 8, the hollow chamber 6 is attached to the hollow panel 1 at the base of the center pillar 1a located at the boundary between the center pillar 1a and the rocker panel 1b of the vehicle body. The case where it is the hollow chamber blocker 10 made is illustrated.
As shown in FIGS. 4 and 6, the hollow panel 1 that forms the root of the center pillar 1 a is formed by spot welding the inner panel 2 and the outer panel 4 at the flanges 3 and 5 of both the panels 2 and 4. A hollow box-shaped closed section is formed.
A non-circular mounting hole 7 such as an oval, an oval, or a quadrangle is inserted through a predetermined position of the inner panel 2 so that a holder body 20, which will be described later, is rotated and fixed to the mounting clip 31. .
[0010]
As shown in FIGS. 1 and 2, a hollow chamber interrupter 10 for blocking the hollow chamber 6 of the hollow panel 1 mainly includes a foamable base material 11 and a holder body 20.
The holder body 20 includes a pair of holder plates 21 and 40 that support both side surfaces of the foamable substrate 11 in a sandwiched manner.
The pair of holder plates 21 and 40 are each formed of a heat-resistant synthetic resin (thermoplastic synthetic resin).
Of the pair of holder plates 21, 40, one holder plate 21 includes a main body plate portion 22 in a direction substantially perpendicular to the hollow chamber 6 (a direction in which the hollow chamber 6 is blocked) at the root of the center pillar 1a, Front and rear projecting portions 24 that are bent at a predetermined angle from the front and rear side edges of the main body plate portion 22 by a predetermined angle and extend in different shapes toward the front and rear wall surfaces of the hollow chamber 6. It is prepared as one. An appropriate gap through which the paint can pass is set between the peripheral portion of the holder plate 21 including the main body plate portion 22 and the overhang portion 24 and the inner peripheral wall surface of the hollow chamber 6.
[0011]
Further, a required number of mounting clips 31 for elastically engaging the mounting hole 7 of the inner panel 2 and mounting the hollow chamber blocking device 10 in the hollow chamber 6 are provided on one side edge of the holder plate 21. It is integrally formed. The mounting clip 31 includes a pedestal portion 32 projecting from a substantially central portion on one side of the peripheral portion of the holder plate 21, a leg portion 33 projecting from the lower surface of the pedestal portion 32 and extending to the mounting hole 7, and a leg portion thereof. A pair of elastic locking pieces 34 extending in a folded shape from both sides of the distal end portion of 33 and elastically engaging with the mounting hole 7 are provided.
[0012]
As shown in FIGS. 1 and 2, a plurality of coupling clips 26 for coupling and holding the other holder plate 40 with the foamable base material 11 interposed therebetween on one side surface of the one holder plate 21. Are integrally formed.
These coupling clips 26 are integrally provided with leg portions 27 and elastic coupling pieces 28.
The leg portions 27 of the coupling clips 26 protrude from the one side surface of the holder plate 21 in a substantially parallel shape. An elastic coupling piece 28 that can be elastically deformed is projected from the tip of the leg 27.
[0013]
The other holder plate 40 bonded to one side surface of the one holder plate 21 with the foamable base material 11 interposed therebetween is formed in a shape substantially the same as that of the one holder plate 21, and is formed in the hollow chamber 6. A body plate portion 42 that is substantially orthogonal, and both front and rear tensions that are bent at a predetermined angle from the front and rear side edges of the body plate portion 42 and extend in different shapes toward the front and rear wall surfaces of the hollow chamber 6. A protruding portion 44 is integrally provided.
Furthermore, the other holder plate 40 is formed with a coupling hole 45 that engages with the elastic coupling piece 28 of the coupling clip 26 at a position corresponding to each of the plurality of coupling clips 26 of the one holder plate 21.
As shown in FIGS. 1 and 2, the holder body 20 having the pair of holder plates 21 and 40 as described above corresponding to the hollow chambers 6 of the hollow panels 1 on the left side and the right side of the vehicle body, The holder body 20L for the left side and the holder body 20R for the right side are respectively formed symmetrically.
[0014]
The foamable base material 11 held between each pair of holder plates 21 and 40 of the holder bodies 20L and 20R having a symmetrical shape is a synthetic resin mixed with a foaming agent that foams at a temperature of about 110 ° C to 190 ° C. It is made of a foaming material of the type (preferably a foaming material having metal adhesion), and is formed in a flat plate shape having a predetermined plate thickness that is substantially the same size as the developed shape of the holder plate 21 (or the holder plate 40). ing. Insertion holes 17 through which the plurality of coupling clips 26 are inserted are provided at predetermined positions of the foamable substrate 11.
[0015]
As shown in FIG. 3, the foamable base material 11 can be used in common with symmetrical holder bodies 20L, 20R, and a pair of holder plates 21, Bending deformation portions 12 that can be bent and deformed are formed along the 40 bending portions 23 and 43.
In this embodiment, the two bent deformation portions 12 of the foamable base material 11 are thin-walled portions formed on the foamable base material 11 along the two bent portions 23 and 43 before and after the pair of holder plates 21 and 40. 13 and a plurality of through holes 14 penetrating at an appropriate interval in the longitudinal direction of the thin portion 13.
As shown in FIGS. 1 and 2, the foamable base material 11 is bent at the bending deformation portion 12, so that the pair of holder plates 21, 40 of the symmetric holder bodies 20 </ b> L, 20 </ b> R. It is surely held between.
[0016]
That is, when the foamable base material 11 is assembled to the left-side holder body 20L to form the left-side hollow chamber breaker 10L, first, the foamable base material 11 is attached to each coupling clip 26 of one holder plate 21. Are inserted in the respective insertion holes 17. At this time, the foamable substrate 11 is elastically deformed at the bent deformation portion 12 at the bent portion 23 at the boundary portion between the main body plate portion 22 and the overhang portion 24 of the holder plate 21.
For this reason, the foamable base material 11 is reliably held with respect to the both overhang portions 24 of the holder plate 21 without being lifted.
Thereafter, the other holder plate 40 is inserted into each of the coupling clips 26 of the one holder plate 21 in each of the coupling holes 45, and the elastic coupling pieces 28 of these coupling clips 26 are elastically coupled to the coupling holes 45. The other holder plate 40 is coupled to the one side surface of one holder plate 21 with the foamable substrate 11 interposed therebetween. As a result, the foamable base material 11 is held between the holder plates 21 and 40, and the left side hollow chamber breaker 10L is configured.
[0017]
Further, the foamable base material 11 is bent in the bending deformation portion 12 in the opposite direction to the above, so that the foamable base material 11 is also foamed to the right holder body 20R in the same manner as the left holder body 20L. The base material 11 is securely held, and thereby the right-side hollow chamber barrier 10R is configured.
For this reason, unlike the conventional case, a bending-shaped foamable base material corresponding to the left holder body 20L and a bent foamable base material corresponding to the right-side holder body 20R are respectively used with dedicated molding dies. This eliminates the need for manufacturing, reduces the manufacturing cost of the mold, and facilitates inventory management of the foamable substrate 11.
[0018]
Moreover, in this embodiment, the bending deformation part 12 of the foamable base material 11 includes the thin-walled part 13 formed on the foamable base material 11 along the bending parts 23 and 43 of the pair of holder plates 21 and 40. The thin-walled portion 13 is constituted by a combination with a plurality of punched holes 14 penetrating at an appropriate interval in the longitudinal direction.
For this reason, even when the curvature radii of the bent portions 23 and 43 of the pair of holder plates 21 and 40 are small and the bending angle is large, the bent deformation portion 12 of the foamable base material 11 extends along the bent portions 23 and 43. Bends and deforms well. For this reason, the malfunction that the foaming base material 11 breaks in the bending deformation part 12 can be prevented.
Further, when the bending radii 23 and 43 of the pair of holder plates 21 and 40 are relatively large in radius of curvature and the bending angle is small, the bending deformation portion 12 of the foamable substrate 11 is constituted only by the thin portion 13 or Even if only the required number of holes 14 are configured, it is possible to prevent the bending deformation portion 12 from being broken.
[0019]
Further, in the hollow chamber breaker 10 configured as described above, the inner panel 2 and the outer panel 4 constituting the hollow panel 1 are attached to the inner panel 2 before spot welding at the flanges 3 and 5 thereof. The hollow chamber breaker 10 is attached to the hole 7 by being stopped by the attachment clip 31 of the holder plate 21 (see FIGS. 4 and 6).
After the hollow chamber breaker 10 is attached to the inner panel 2 as described above, the inner panel 2 and the outer panel 4 are spot-welded at the flanges 3 and 5 thereof to form a hollow box-shaped closed section. Panel 1 is constructed.
Here, as shown in FIGS. 5 and 7, the foamable base material 11 of the hollow chamber breaker 10 is heated from the outside, for example, by external heating at the time of baking painting of the vehicle body having the hollow panel 1. Foam is formed into a foam 15.
[0020]
As shown in FIGS. 5 and 7, when the foamable base material 11 is foamed, both side surfaces of the foamable base material 11 are sandwiched and supported between a pair of holder plates 21 and 40. In the longitudinal direction of the hollow chamber 6, foaming of the foamable base material 11 is restricted by the pair of holder plates 21 and 40, respectively. For this reason, the peripheral part of the foam 15 by foaming of the foamable base material 11 adheres to the inner peripheral wall surface of the hollow chamber 6 reliably and satisfactorily. As a result, the hollow chamber 6 is efficiently shut off by the foam 15 without interruption failure.
[0021]
In the above-described embodiment, a hollow that is attached to the hollow chamber 6 of the hollow panel 1 at the root of the center pillar 1a located at the boundary between the center pillar 1a and the rocker panel 1b of the vehicle body and blocks the hollow chamber 6. Although the case where it was the room shut-off tool 10 was illustrated, it is not limited to this.
Moreover, in the said embodiment, a pair of holder plates 21 and 40 are the main body plate parts 22 and 42 of the direction (direction which interrupts | blocks the hollow chamber 6) in the direction substantially orthogonal to the hollow chamber 6 of the hollow panel 1, and its main body plate. Front and rear projecting portions 24 and 44 that are bent at predetermined angles with the bent portions 23 and 43 from the front and rear side edges of the portions 22 and 42, respectively, and extend in different shapes toward the front and rear wall surfaces of the hollow chamber 6. However, the present invention is not limited to this.
[0022]
For example, the overhang portions 24 and 44 may be formed only on one side of the main body plate portions 22 and 42 of the pair of holder plates 21 and 40 via the bent portions 23 and 43. In this case, as shown in FIG. 9, the bending deformation portion 12 is formed only in the portion closer to one side of the foamable substrate 11.
Moreover, in the said embodiment, although the one holder plate 21 of the holder body 20 and the other holder plate 40 were formed in the different body and couple | bonded by the coupling clip 26, both holder plates 21, It is also possible to form 40 integrally.
In the above embodiment, the case where the hollow structure is a hollow panel 1 such as a pillar, rocker panel, roof sand panel or the like of a vehicle body is illustrated, but the present invention is not limited to this. It may be a hollow structure constituting a building such as a building or a ship.
[0023]
【The invention's effect】
As described above, according to the present invention, since the foamable base material is deformed in an arbitrary direction at the bending deformation portion thereof, the foamable base material is compared with the holder plate of the holder body formed symmetrically. Can be used in common. For this reason, it is possible to eliminate the necessity of separately manufacturing a symmetrical foamable base material using a dedicated mold, and to reduce the production cost of the mold. Stock management of the material becomes easy.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state where a foamable base material and a holder body of a symmetrical hollow chamber breaker in a hollow structure according to an embodiment of the present invention are separated.
FIG. 2 is a perspective view showing a state in which a foamable base material and a holder body are assembled to each other to form a left-right symmetric hollow chamber breaker.
FIG. 3 is a perspective view showing a foamable substrate.
FIG. 4 is a longitudinal sectional view showing a state in which a left-side hollow chamber breaker is similarly mounted in the hollow chamber of the hollow panel.
FIG. 5 is a longitudinal sectional view showing a state where the foamable base material of the hollow chamber interrupter is also foamed.
6 is a cross-sectional view based on the line VI-VI in FIG. 4 showing a state in which a hollow chamber breaker for the left side is similarly mounted in the hollow chamber of the hollow panel.
FIG. 7 is a cross-sectional view showing a state where the foamable base material of the hollow chamber interrupter is also foamed.
FIG. 8 is an explanatory view showing a state in which a hollow chamber blocking device is housed in the hollow panel of the vehicle body.
FIG. 9 is a perspective view of a foamable substrate showing another embodiment of the present invention.
[Explanation of symbols]
1 Hollow panel (hollow structure)
6 Hollow chamber 7 Mounting hole 10 Hollow chamber blocker 11 Foamable base material 12 Bending deformation portion 13 Thin portion 14 Punching hole 15 Foam body 20 Holder bodies 21 and 40 Holder plates 22 and 42 Main body plate portions 23 and 43 Bending portion 24, 44 Overhang 26 Connecting clip 31 Mounting clip

Claims (4)

In a hollow structure comprising: a holder body attached to a hollow chamber of a hollow structure; and a foamable substrate supported by the holder body and foamed by external heating to form a foam to block the hollow chamber A hollow chamber barrier,
The holder body has a holder plate that supports at least one side surface of the foamable base material. The holder plate is a main body plate portion that is substantially orthogonal to the hollow chamber, and is predetermined from at least one side of the main body plate portion. And a projecting portion that is bent at an angle of and extended toward the side wall surface of the hollow chamber,
A hollow chamber breaker in a hollow structure in which the foamable base material is formed with a bending deformation portion that can be bent and deformed along a bending portion of the holder plate. It is a hollow chamber circuit breaker in the hollow structure of Claim 1, Comprising: The bending deformation part of a foamable base material is comprised by the thin part formed in the foamable base material along the bending part of a holder plate. A hollow chamber breaker in a hollow structure. It is a hollow chamber circuit breaker in the hollow structure of Claim 1, Comprising: The bending deformation part of a foamable base material is the required number of punch holes formed in the foamable base material along the bending part of a holder plate. A hollow chamber shut-off device in a constructed hollow structure. The hollow chamber breaker in the hollow structure according to claim 1, wherein the bending deformation portion of the foamable base material is a thin portion and a hole formed in the foamable base material along the bending portion of the holder plate. A hollow chamber breaker in a hollow structure constituted by a combination.

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