JP2000102991A - Hollow chamber cutting-off jig in hollow structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hollow chamber cutting/off jig in a hollow structure capable of easily inserting a foamable base material into the gap between a pair of support plates without forcibly expanding a pair of the support plates and capable of preventing the pull-off of the foamable base material. SOLUTION: A holder member 20 and a foamable base material 11 foamed by external heating to become foam to cut off a hollow chamber are provided. The holder member 20 is provided in the direction right-angled to the longitudinal direction of a hollow chamber and has a pair of support plates supporting both surfaces of the foamable base material 11 to prescribe the foaming direction of the foamable base material 11. At least one of support plates is provided with pull-off preventing pieces 24. The elastic pull-off preventing pieces 24 are elastically deformed by the insertion of the foamable basic material and, by the elastic force based on this elastic deformation, the foamable base material 11 is held between a pair of the support plates by the elastic force based on the elastic deformation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow chamber shut-off device for a hollow structure, and more particularly to a vehicle body pillar, a rocker panel, a roof side panel, etc., which is constituted by a plurality of panels in a hollow box-shaped closed cross section. The present invention relates to a hollow chamber shutoff device in a hollow structure for improving vibration suppression, soundproofing, etc. of a hollow panel.

[0002]

2. Description of the Related Art A hollow chamber shut-off device of this kind in a hollow structure is disclosed, for example, in Japanese Patent Application Laid-Open No. 8-276448. In the hollow chamber blocking device of such a hollow structure, as shown in FIGS. 8 to 10, a holder body 120 attached to the hollow chamber 107 of the hollow panel 101.
And the foam 115 is foamed by external heating and is supported by the holder body 120, thereby forming the hollow chamber 1.
And a foamable base material 111 that blocks the outflow of the base material 07. The holder body 120 is provided in the hollow chamber 10 of the hollow panel 101.
7 is provided in a direction orthogonal to the longitudinal direction, and has a pair of support plates 121 for supporting both side surfaces of the foamable base material 111 to regulate the foaming direction of the foamable base material 111. In addition, on the opposing side surfaces of the pair of support plates 121 and the foamable base material 111, a mutually engaging engaging projection 112 and an engaging hole 122 are formed. Then, the foaming base material 111 is positioned and held between the pair of support plates 121 by the engaging force between the locking projections 112 and the locking holes 122. In this way,
In a state where the foamable base material 111 is held between the pair of support plates 121, the foamable base material 111 foams, so that the foamable base material 111 foams in the longitudinal direction of the hollow chamber 107. Since the foaming is promoted in the direction orthogonal to the longitudinal direction, the hollow chamber 107 is efficiently shut off by a small amount of the foam made of the foamable base material 111.

[0003]

By the way, in the prior art, when a foamable base material 111 is inserted between a pair of support plates 121 and mounted, as shown in FIG. It is necessary to forcibly expand the pair of support plates 121 so that the locking protrusions 112 protruding from both side surfaces of the support plate 121 do not become an obstacle. Then, while maintaining the state in which the pair of support plates 121 are forcibly expanded, the foamable base material 111 is inserted to a predetermined position between the pair of support plates 121, and the locking projections 112 and the locking holes are formed. 122 must be engaged. For this reason,
The work of inserting and mounting the foamable base material 111 between the pair of support plates 121 is cumbersome, and requires a lot of labor and time, resulting in an increase in cost.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, an object of the present invention is to easily insert a foamable base material between a pair of support plates without forcibly expanding the pair of support plates. In addition, it is an object of the present invention to provide a hollow chamber blocking device in a hollow structure capable of retaining and holding a foamable base material.

[0005]

According to a first aspect of the present invention, there is provided a hollow structure shut-off device for a hollow structure, comprising: a holder attached to a hollow chamber of the hollow structure; A foamable base material that is supported by and is foamed by external heating to form a foam to block the hollow chamber, and wherein the holder body is provided with the hollow chamber. A pair of support plates provided in a direction perpendicular to the longitudinal direction of the foamable base material, and supporting both side surfaces of the foamable base material to regulate a foaming direction of the foamable base material; Of which
At least one of the support plates is provided with an elastic stopper that projects elastically deformable toward the other support plate, and the elastic stopper is inserted with the foamable base material between the pair of support plates. Thereby, the foamable base material is pressed and elastically deformed, and the foamable base material is held between the pair of support plates by an elastic force based on the elastic deformation.

Therefore, between the pair of support plates,
When mounting an unfoamed foamable base material, first, the foamable base material is inserted from the upper end between a pair of support plates.
Then, the elastic retaining piece of at least one of the support plates is pressed against the foamable base material and is elastically deformed. Then, the foamable base material is held between the pair of support plates by the elastic force based on the elastic deformation of the elastic retaining piece. Further, when the foamable base material foams, both side surfaces of the foamable base material are supported by a pair of support plates in a direction orthogonal to the longitudinal direction of the hollow chamber. On the other hand, foaming of the foamable base material is restricted, and foaming of the foamable base material is efficiently promoted in a direction perpendicular to the longitudinal direction of the hollow chamber. For this reason, the hollow chamber is satisfactorily shut off by the foam formed by the foaming of the expandable base material without poor shutting.

According to a second aspect of the present invention, there is provided a hollow chamber shutoff device for a hollow structure according to the first aspect of the present invention. In the blocking device, the elastic retaining pieces are provided on the opposing surfaces of the pair of support plates. Therefore, the elastic stoppers are provided on the pair of support plates, respectively, so that the elastic force of the elastic stoppers based on the elastic deformation is increased, and the foam base material is more securely held between the pair of support plates. Is done.

According to a third aspect of the present invention, there is provided a hollow-room shutoff device for a hollow structure according to the first aspect, wherein the hollow-room shutoff device for a hollow structure according to the first aspect is provided. , The elastic stopper is formed integrally with the support plate. Therefore, there is no need to manufacture and assemble the elastic retaining piece separately from the support plate,
Costs can be reduced by reducing the number of parts and the number of assembly steps.

According to a fourth aspect of the present invention, there is provided a hollow structure blocking device for a hollow structure according to the first aspect, wherein the foamable base material is engaged with an elastic retaining piece. A locking recess is formed, and the foamable base material is positioned and held between the pair of support plates by the engagement of the elastic retaining piece and the locking recess. Accordingly, when the foamable base material is inserted between the pair of support plates, the elastic retaining pieces of at least one of the support plates elastically engage with the locking recesses on the side surfaces of the foamable base material. For this reason, the engaging force between the elastic retaining piece and the locking recess is increased, and the foamable base material is more reliably positioned and held between the pair of support plates, and the foaming base material is formed between the pair of support plates. The disadvantage that the conductive base material comes off unexpectedly is more reliably prevented.

[0010]

(Embodiment 1) Embodiment 1 of the present invention will be described with reference to FIGS. 2 and 3, a pillar of a vehicle body as a hollow structure,
Hollow panels 1 such as rocker panels and roof side panels
The inner panel 2 and the outer panel 4 are formed in a hollow box-shaped closed cross section by spot welding the flanges 3 and 5 of the panels 2 and 4. At a predetermined position of the inner panel 2, a holder body 20 described later is provided.
However, a non-circular mounting hole 6 such as an ellipse, an ellipse, or a square is inserted through the locking clip 31 to be stopped and fitted.

As shown in FIG. 1 and FIG. 2, a hollow chamber blocking device 10 for blocking the hollow chamber 7 of the hollow panel 1 includes a foamable base material 11 and a holder body 20. The holder body 20 is integrally formed by injection molding of a synthetic resin or the like,
A pair of support plates 21a and 21b and a mounting means are integrally provided. The pair of support plates 21a, 21b
It supports the both sides of the foamable base material 11 by sandwiching it, and is formed in a flat plate shape in a direction perpendicular to the longitudinal direction of the hollow chamber 7 of the hollow panel 1. Are connected integrally by a required number of connecting portions 22 while maintaining substantially the same spacing dimension as. Further, the pair of support plates 21a and 21b have substantially the same size or slightly smaller shape as the foamable base material 11, and an appropriate gap is set between the support plate 21a and the inner peripheral wall surface of the hollow chamber 7. I have.

In the first embodiment, the mounting hole 6 of the inner panel 2 is formed substantially at the center of one side (lower side as viewed in FIG. 2) of the pair of supporting plates 21a and 21b. At a corresponding position, a locking clip 31 as an attachment means is integrally formed. Locking clip 3
1 is a pedestal portion 32 projecting to a substantially central portion on one side of a peripheral portion of the pair of support plates 21a and 21b, and the pedestal portion 32
Legs 33 projecting from the lower surface of the
The leg 33 has a pair of elastic locking pieces 34 extending from both sides of the distal end of the leg 33 in a folded manner and elastically engaging with the mounting holes 6.

Now, the pair of supporting plates 21a, 2a
1b, in the first embodiment,
On the left side of the support plate 21a as viewed in FIG. 2, elastic stopper pieces 24 are integrally formed on left and right portions of the plate surface so as to protrude elastically toward the other support plate 21b. One end of each of the elastic retaining pieces 24 is integrally connected to one of the support plates 21, and the other end is a free end, and is formed in a substantially mountain-shaped section which can be elastically deformed. The inclined surface on the side to be used is the guide surface.

On the other hand, the foamable base material 11 has a temperature of 110.degree.
It is formed of a synthetic resin foamable material mixed with a foaming agent which foams at a temperature of about 0 ° C. Further, the foamable base material 11 has a size and a shape such that an appropriate gap is formed between the foamable base material 11 and the inner peripheral wall surface of the hollow chamber 7 in a non-foamed state, and the space between the pair of support plates 21a and 21b. It has a flat plate shape having a predetermined plate thickness that can be inserted into the plate.
In the foamable base material 11, locking recesses 12 are formed on side surfaces facing one support plate 21a. Then, a pair of support plates 21a, 21b
When the foamable base material 11 is inserted by a predetermined amount therebetween, the locking recesses 12 are engaged with the elastic stopper pieces 24 of one support plate 21a, respectively. The foaming base material 11 is positioned and held between the pair of support plates 21a and 21b by the engaging action with the support plate 21a and 21b. In addition, foamable base material 1
1, the insertion groove 13 is formed in a notch shape at a position corresponding to the connecting portion 22 of the holder body 20.

[0015] The hollow chamber blocking device 10 according to the first embodiment.
Is configured as described above. Therefore, when mounting the unfoamed foamable base material 11 between the pair of support plates 21a and 21b, first,
The foamable base material 11 is inserted from the upper end portion between a and 21b. Then, the front end of the foamable base material 11 in the insertion direction comes into contact with the guide surface of the elastic retaining piece 24 of one support plate 21a. Subsequently, when the foamable base material 11 is inserted,
The elastic stopper piece 24 is elastically deformed in the retracting direction by being pressed by the foamable base material 11.

Thereafter, when the foamable base material 11 is further inserted to a required insertion end position, as shown in FIG.
The elastic retaining piece 24 protrudes toward the locking concave portion 12 of the foamable base material 11 by an elastic force based on the elastic deformation, and elastically engages with the locking concave portion 12. And the elastic retaining piece 24
The foamable base material 11 is positioned and held between the pair of support plates 21a and 21b by the engagement between the and the locking concave portion 12. For this reason, a pair of support plates 21a,
The problem that the foamable base material 11 unexpectedly comes out from between the portions 21b is prevented.

As described above, the pair of support plates 21
A pair of support plates 21a, 21b are inserted by a very simple operation of inserting the foamable base material 11 between the pair of support plates 21a, 21b.
The foamable base material 11 can be easily and quickly and reliably prevented from falling off during the positioning of the base material 21b. Therefore, unlike the conventional case, the pair of support plates 21a, 21b
Can be forcibly expanded to eliminate the trouble of inserting the foamable base material 11.

As described above, the pair of support plates 21
The hollow-room shutoff device 10 with the foamable base material 11 mounted between a and 21b is mounted in the hollow chamber 7 of the hollow panel 1 as a hollow structure as follows. First, the inner panel 2 and the outer panel 4 constituting the hollow panel 1 are
Before spot welding at the mutual flanges 3, 5, the hollow chamber cutoff 1 is inserted into the mounting holes 6 of the inner panel 2.
0 is attached to the holder body 20 in a state of being stopped by the locking clip 31 of the holder body 20. Thereafter, the inner panel 2 and the outer panel 4 are spot-welded at their mutual flanges 3 and 5 to form the hollow panel 1 having a hollow box-shaped closed cross section.

Here, the foamable base material 11 of the hollow chamber closing device 10 is heated by external heating, for example, by external heating at the time of baking coating of the vehicle body having the hollow panel 1.
As shown in FIG. 4 and FIG. FIG.
As shown in FIG. 5 and FIG. 5, when the foamable base material 11 foams, both side surfaces of the foamable base material 11 form a pair of support plates 21 a and 21 b in a direction orthogonal to the longitudinal direction of the hollow chamber 7.
Therefore, foaming of the foamable base material 11 is restricted in the longitudinal direction of the hollow chamber 7.
Therefore, foaming of the foamable base material 11 is effectively promoted in a direction perpendicular to the longitudinal direction of the hollow chamber 7.
Then, the peripheral portion of the foam 15 formed by the foaming of the foamable base material 11 securely and satisfactorily adheres to the inner peripheral wall surface of the hollow chamber 7, whereby the hollow chamber 7 is shut off, and the vibration control and soundproofing of the hollow panel 1 are prevented. It is planned.

(Embodiment 2) Embodiment 2 of the present invention
Will be described with reference to FIGS. Embodiment 2
In FIG. 6, as shown in FIGS. 6 and 7, elastic stoppers protrude from left and right portions of the opposite plate surfaces of the pair of support plates 21a and 21b of the holder body 20 so as to be elastically deformable toward the opposite plate surfaces. The pieces 24 are respectively formed integrally.
In addition, by inserting a predetermined amount of the foamable base material 11 between the pair of support plates 21 a and 21 b on both side surfaces of the foamable base material 11, the locking recesses 12 respectively engaged with the elastic retaining pieces 24. Are formed. Other configurations of the second embodiment are substantially the same as those of the first embodiment, and therefore, the same components are denoted by the same reference numerals and description thereof will be omitted.

Therefore, in the second embodiment, when the unfoamed foamable base material 11 is mounted between the pair of support plates 21a and 21b, the pair of support plates 21a and 21b are mounted in substantially the same manner as in the first embodiment. With the extremely simple operation of inserting the foamable base material 11 between the plates 21a and 21b, the foamable base material 11 is easily and quickly and reliably prevented from slipping between the pair of support plates 21a and 21b, and is positioned and held. can do.

In particular, in the second embodiment, when the foamable base material 11 is inserted between the pair of support plates 21a and 21b, the elastic retaining pieces 24 formed on the pair of support plates 21a and 21b respectively The elastic recesses 12 are elastically engaged with the locking recesses 12 on both sides of the foamable base material 11. For this reason, the engagement force between the elastic retaining piece 24 and the locking recess 12 is enhanced, and the foamable base material 11 is more reliably positioned and held between the pair of support plates 21a and 21b, and the pair of support plates 21a and 21b is held. The problem that the foamable base material 11 unexpectedly comes out from between the support plates 21a and 21b is more reliably prevented.

In the first and second embodiments,
An elastic retaining piece 24 provided on at least one of the pair of support plates 21a and 21b.
Although the case where the locking concave portion 12 is formed in the foamable base material 11 corresponding to the above is exemplified, it is not always necessary to form the locking concave portion 12 in the foamable base material 11. That is, of the pair of support plates 21a, 21b, at least one of the support plates 21a, 21b is elastically deformed by the elastic stopper piece 24 provided on at least one of the support plates 21a.
It is also possible to hold the foamable substrate 11 between 1b. Further, in the first and second embodiments, the case where the hollow structure is the hollow panel 1 such as a pillar, a rocker panel, and a roof sand panel of the vehicle body is exemplified. However, the present invention is not limited to this. It may be other than.

[0024]

As described above, according to the present invention,
By inserting the foamable base material between the pair of support plates, it is possible to hold the foamable base material easily and quickly and securely between the pair of support plates, Unlike the related art, it is possible to eliminate the trouble of inserting the foamable base material by forcibly expanding the pair of support plates.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a foamable base material and a holder body of a hollow chamber blocking device in a hollow structure according to Embodiment 1 of the present invention are separated.

FIG. 2 is a cross-sectional view showing a state in which a hollow chamber blocking device is mounted in a hollow chamber of the hollow panel.

FIG. 3 is a longitudinal sectional view showing a state in which a hollow chamber blocking device is attached to a hollow chamber of the hollow panel.

FIG. 4 is a cross-sectional view showing a state in which the foamable base material of the hollow chamber blocking device is foamed.

FIG. 5 is a longitudinal sectional view showing a state in which the foamable base material of the hollow chamber blocking device is foamed.

FIG. 6 is a longitudinal sectional view showing a state before a foamable base material is inserted between a pair of support plates of a hollow chamber blocking device in a hollow structure according to Embodiment 2 of the present invention.

FIG. 7 is a longitudinal sectional view showing a state in which a foamable base material is inserted and held between a pair of support plates.

FIG. 8 is a perspective view showing a state in which a foamable base material and a holder body of a hollow chamber blocking device in a conventional hollow structure are separated.

FIG. 9 is a longitudinal sectional view showing a state before a foamable base material is inserted between a pair of support plates.

FIG. 10 is a longitudinal sectional view showing a state where a foamable base material is inserted and held between a pair of support plates.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hollow panel (hollow structure) 6 Hollow chamber 7 Mounting hole 10 Hollow chamber shutoff tool 11 Foamable base material 12 Locking recess 15 Foam 20 Holder bodies 21a, 21b A pair of support plates 24 Elastic stopper piece 31 Lock clip ( Mounting means)

Claims (4)

[Claims] 1. A holder comprising a holder attached to a hollow chamber of a hollow structure, and a foamable base material supported by the holder and foamed by external heating to form a foam to shut off the hollow chamber. A hollow chamber blocking device in a hollow structure, wherein the holder body is provided in a direction orthogonal to a longitudinal direction of the hollow chamber, and supports both side surfaces of the foamable base material. A pair of support plates for regulating the foaming direction of at least one of the pair of support plates, and at least one of the support plates is provided with an elastic stopper piece that protrudes elastically toward the other support plate. The elastic retaining piece is elastically deformed by being pressed by the foamable base material by inserting the foamable base material between the pair of support plates, and the elasticity is based on the elastic force based on the elastic deformation. A hollow chamber blocking device in a hollow structure configured to hold the foamable base material between a pair of support plates. 2. The hollow chamber shutoff device according to claim 1, wherein the elastic retaining pieces are provided on the opposing surfaces of the pair of support plates, respectively. 3. The hollow chamber shutoff device according to claim 1, wherein the elastic retaining piece is formed integrally with the support plate. 4. The hollow-blocking device for a hollow structure according to claim 1, wherein the foamable base material is formed with a locking recess for engaging with the elastic retaining piece, and the elastic retaining piece and the retaining recess are formed. A hollow chamber blocking device in a hollow structure having a configuration in which a foamable base material is positioned and held between a pair of support plates by an engagement action with the hollow plate.