JP3162247B2 - Extruded profile for hollow panel and method for manufacturing hollow panel using the extruded profile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruded profile for a hollow panel for producing a wide hollow panel such as a floor panel for an automobile and a method for producing a hollow panel using the extruded profile.

[0002]

2. Description of the Related Art Conventionally, a wide hollow panel as described above has been manufactured by welding a single plate-like member and a rectangular cross-sectional member in opposition to each other or by forming a plurality of separate and independent hollow panel units. Or by directly extruding using a large-sized extruder.

[0003]

However, in the method of welding a single flat plate member and a rectangular cross-section member, the following method is used.
Since the size of the flat plate member or the rectangular cross-sectional member becomes the size of the hollow panel as it is, in order to manufacture a wide hollow panel, a large flat plate member or a rectangular cross-sectional member itself must be prepared. In addition, the handling and storage are complicated, and the welding work between the flat plate-shaped member and the rectangular-shaped member is troublesome, and the cost is high.

In the method of butting the ends of a plurality of separate and independent hollow panel units in a fitted state, misalignment or the like is apt to occur at the butted portion, and a local step or unevenness is produced in the manufactured hollow panel. There are drawbacks that they are easily generated and that the butting operation is troublesome. In addition, in order to ensure the sealing performance of the butted portion, it is necessary to perform welding at two places, the front surface and the rear surface, and not only is the welding work troublesome, but if there is poor welding, the sealing performance may be impaired. there were. Further, there is a disadvantage that the fitting itself becomes difficult when the thickness is reduced.

Further, in the method of directly extruding a wide hollow panel with a large extruder, a die having a large die diameter must be used, and there is a problem that the die cost is high and the die life is short. In addition, there is a problem that as the hollow panel becomes larger, it is difficult to reduce the wall thickness due to technical limitations.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and is capable of efficiently producing a wide hollow panel which has little misalignment, has excellent sealing properties, and can be made thinner by a simple method. To provide an extruded profile for a hollow panel and a method for manufacturing a hollow panel using the extruded profile.

[0007]

SUMMARY OF THE INVENTION For the above-mentioned objects, the present invention has at least two features when shown with reference to the drawings.
A connecting piece (6) provided adjacent to one of the hollow panel units (2) (3) (4) (5) along an end thereof
Are connected to each other in a V-shaped cross section or an inverted V-shaped cross-section, and are connected to adjacent ends of the connected hollow panel units in a direction in which the expanded state is maintained in the plane expanded state of these hollow panel units. An extruded shape for a hollow panel is characterized in that engagement portions (22) and (32) are formed to engage with the extrusion. Preferably, the connecting pieces (6) and the engaging portions (22) (32) in the thickness direction of the hollow panel unit
Are alternately reversed for each connecting portion of the hollow panel unit.

The adjacent hollow panel units (2), (3), (4) and (5) of the extruded profile (1) according to the first aspect of the present invention are formed by deforming the connecting piece (6) to form a connection between adjacent ends. Joint part (22) (32)
The invention is characterized in that a hollow panel manufacturing method is characterized in that the hollow panel is opened and processed in a plane developed state until they are engaged with each other.

[0009]

The adjacent hollow panel units (2), (3), (4) and (5) of the extruded profile for hollow panel (1) are deformed by connecting pieces (6) to form engaging portions (22) at adjacent ends. The wide hollow panel (A) is manufactured by opening and processing in a flat developed state until the (32) engages with each other. In addition, since each hollow panel unit is previously connected by the connecting piece (6) and is engaged by the engaging portions (22) and (32), the risk of misalignment at the butted portion is reduced and Since the panel unit is constrained by the connection and engagement, the welding operation is simplified when welding the butted portion.
The connecting piece (6) is extruded into a hollow panel unit (2).
(3) Since it is formed integrally with (4) and (5), even if a liquid such as moisture enters the hollow panel, further intrusion and permeation are prevented by the connecting piece (6), and the sealing property is obtained. Will also be excellent.

Also, the positional relationship between the connecting pieces (6) and the engaging portions (22) and (32) in the thickness direction of the hollow panel unit is alternately reversed for each connecting portion of the hollow panel unit. When the butted portions are welded, the directions of the bending moments acting on the connecting portions due to the thermal strain caused by the welding are opposite to each other at the adjacent connecting portions. For this reason,
There is no inconvenience that all the connecting portions receive the bending moment in the same direction and the entire hollow panel in the deployed state is deformed in an arc shape, and the flatness of the entire hollow panel is ensured.

[0011]

Next, an embodiment in which the present invention is applied to a hollow panel made of aluminum (including the alloy thereof, hereinafter the same) will be described with reference to the drawings.

FIG. 2 shows an extruded profile (1) for hollow panels made of aluminum. The extruded profile for hollow panel (1) is composed of a plurality of (four in the embodiment) thin-walled flat hollow panel units (2), (3), (4), and (5), which are cross-sectioned between adjacent ones. They are arranged in an inverted V-shape or a V-shape, and the whole has an inverted W-shape in cross section. This extruded shape is formed by extruding an aluminum billet into an inverted W-shaped cross section, and then cutting the aluminum billet to a predetermined length in a direction perpendicular to the extrusion direction. The two adjacent hollow panel units are provided along the inner edge of the adjacent end side surface, and extend inward in the thickness direction of the panel unit from the edge to form an inverted U-shaped section or Each is connected via a U-shaped connecting piece (6).

Further, as shown in FIG. 1 near the ends of the two hollow panel units (2) and (3) on the left side, adjacent ends of two adjacent hollow panel units (2) and (3) are shown. Abutting pieces (21) and (31) extend from the outer edge of the side surface along the edge in a direction perpendicular to the thickness direction of the panel unit. These contact pieces (21) and (31) are formed such that when the hollow panel units (2) and (3) are opened and processed in a plane developed state, the tips of both contact pieces abut or substantially abut. The protruding length is set. An engagement protrusion (22) having a semicircular cross section protruding toward the connection piece (6) is formed on the inner surface of the distal end of the contact piece (21) in one hollow panel unit (2). . In addition, on the inner surface of the distal end of the contact piece (31) in the other hollow panel unit (3), an engaging hook (32) having a J-shaped cross section bulging toward the connecting piece (6) is provided.
Are formed. The engaging hooks (32) and the engaging projections (22) are formed such that when the hollow panel unit is opened and processed into a flattened state, the engaging projections (22) are recessed ( 32a), the size and shape are set so that they can be engaged with each other.

The configuration of the adjacent end portions of the hollow panel units (3) and (4) and (4) and (5) is the same as the configuration of the hollow panel units (2) and (3). 6), the contact pieces (21) and (31), the engagement projections (22), and the engagement hooks (32) are formed, and are engaged with the connection pieces (6) in the thickness direction of the hollow panel unit. The positional relationship between the projections (22) and the engaging hooks (32) is alternately reversed for each connecting portion of the hollow panel. That is, as shown in FIGS. 2 and 4, in the connecting portion between the hollow panel units (2) and (3), the connecting piece (6) is provided on the lower edge side in the thickness direction of the hollow panel unit and on the upper edge side. An engagement projection (22) and an engagement hook (32) are provided. In addition, hollow panel unit (3)
Conversely, the connecting piece (6) is provided on the upper edge side in the thickness direction of the hollow panel unit, and the engaging projection (22) and the engaging hook (32) are provided on the lower edge side. Is provided. In the connecting portion between the hollow panel units (4) and (5), a connecting piece (6) is provided on the lower edge side in the thickness direction of the hollow panel unit.
However, an engagement projection (22) and an engagement hook (32) are provided on the upper edge side, and the hollow panel units (2), (3), and (4) are provided.
The reverse is alternately performed for each connecting portion of (5).

Next, a method of manufacturing a hollow panel using the extruded profile (1) shown in FIGS. 1 and 2 will be described. The adjacent hollow panel units (2), (3), (4) and (5) are Opening is performed while deforming the connecting piece (6) so that the angle formed by the panel unit becomes large. As the opening process proceeds, the adjacent ends of the two hollow panel units (2), (3), (4), and (5) gradually approach. Then, the tip of the engaging hook (32) of one hollow panel unit (3) (hereinafter, the hollow panel units (2) and (3) will be described as an example) is engaged with the other hollow panel unit (2). The engaging hook (32) is guided along the edge of the engaging projection (22) while being elastically deformed as the opening work further proceeds while abutting on the projection (22). Then, when the connecting piece (6) is deformed in a straight line and the hollow panel unit is opened to a flat developed state as shown in FIGS. 3 and 4, both the adjacent hollow panel units (2) and (3) are processed. The tips of the contact pieces (21) and (31) abut against each other, and the engaging projections (22) of one hollow panel unit (2) are engaged with the engaging hooks (22) of the other hollow panel unit (3). 32) into the recess (32a) to engage the engagement protrusion (2
2) and the engaging hook (32) are engaged, and a state of preventing return deformation to the original shape is achieved.

Thus, the flat wide hollow panel (A)
Then, if necessary, the butting portions (7) of the contact pieces (21) and (31) are welded. Since each panel unit is restrained by the connection by the connection piece (6) and the engagement of the engagement protrusion (22) and the engagement hook (32), the welding operation can be easily performed. Moreover, the positional relationship between the connecting pieces (6) and the engaging portions (22) and (32) in the thickness direction of the hollow panel unit is alternately reversed for each connecting portion of the hollow panel unit.
The directions of bending moments acting on the connecting portions due to welding thermal strain generated when the butting portions (7) of the contact pieces (21) and (31) are welded are opposite to each other at the adjacent connecting portions.
Therefore, it is possible to prevent the entire hollow panel in the deployed state from being deformed in an arc shape by receiving the bending moments in the same direction in all the connecting portions, and to ensure the flatness of the entire hollow panel.

In this embodiment, in each panel unit (2) (3) (4) (5), the contact pieces (21) (3)
Since the engagement projections (22) and the engagement hooks (32) are formed in the space between 1) and the connecting piece (6), these engagement projections (32) are formed when the wide hollow panel (A) is completed. 22) and the engaging hook (32) are accommodated in the space (8) between the contact pieces (21) and (31) and the connecting piece (6), and are not exposed to the outside, so that they look as if they are. It can be seen as a single hollow panel, making it look better.

Further, since the connecting piece (6) is formed integrally with each hollow panel unit (2), (3), (4) and (5) by extrusion, moisture or the like from the butt portion (7) due to poor welding or the like. Even if the liquid infiltrates into the panel, it does not permeate through the connecting piece (6), and thus has extremely excellent sealing properties.

[0019]

As described above, according to the present invention, at least two adjacent panels of the hollow panel unit are connected to each other via a connecting piece provided along an end portion, and a V-shape or a cross section is formed. Engaging portions that are connected in an inverted V-shape and that engage with each other at adjacent ends of the hollow panel units connected by the connecting pieces in a direction in which the hollow panel units maintain the expanded state in a planar expanded state. Are formed. Therefore, the adjacent hollow panel unit of the extruded profile is widened by a very simple operation of deforming the connecting piece and opening and processing it into a flat developed state until the engaging portions at the adjacent ends are engaged with each other. A hollow panel can be manufactured efficiently. As a result, as in the case where a single flat plate member and a rectangular cross-sectional member are arranged and joined to face each other,
The inconvenience of preparing a large flat plate member or a rectangular cross-sectional member is eliminated, and a compact extruded member connected in a V-shaped cross section or an inverted V-shaped cross section can be prepared. Also becomes easier.

Further, since each hollow panel unit is connected in advance by a connecting piece and is engaged by an engaging portion, the ends of a plurality of separated hollow panel units are butted in a fitted state, and then butted. As in the case of welding parts, it is possible to reduce the risk of misalignment at the butted part,
It is possible to provide a hollow panel with few local steps and unevenness. Moreover, since the connecting piece is formed integrally with the hollow panel unit by extrusion, even if a liquid such as moisture enters the hollow panel, further invasion and permeation can be prevented by the connecting piece, A hollow panel having extremely excellent sealing properties can be obtained.

In addition, when the butted portion is welded, it is not necessary to weld the one butted portion from both the front and back surfaces of the panel. , Each panel unit is restrained, so that the welding operation can be easily performed. Further, since the positional relationship between the connecting piece and the engaging portion in the thickness direction of the hollow panel unit is alternately reversed for each connecting portion of the hollow panel unit, when the butt portion is welded, it is caused by the welding. The directions of the bending moments acting on the connecting portions due to the thermal strains caused by the thermal strain can be reversed between the adjacent connecting portions. Therefore, it is possible to prevent the entire hollow panel in an unfolded state from being deformed in an arc shape by receiving the bending moment in the same direction in all the connecting portions, to maintain the entire hollow panel flat, and to have good flatness. It can be suitably used for floor panels for automobiles and the like.

Furthermore, since a single wide hollow panel is not extruded but a hollow panel unit which is connected in a V-shaped or inverted V-shaped cross section, a die having a large die diameter is used. It is no longer necessary to use the same, and it is possible to prevent a decrease in the life of the die and the like, and to make the panel thinner.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line II of FIG. 2;

FIG. 2 is a perspective view showing one embodiment of an extruded profile for a hollow panel according to the present invention.

FIG. 3 is a sectional view of a main part of a hollow panel manufactured by using the extruded profile for a hollow panel of FIG. 2;

FIG. 4 is a sectional view of a hollow panel manufactured using the extruded profile for a hollow panel of FIG. 2;

[Explanation of symbols]

 A: Hollow panel 1: Extruded profile for hollow panel 2, 3, 4, 5: Hollow panel unit 6: Connection piece 22: Engagement protrusion (engagement part) 32: Engagement hook part (engagement part)

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yuji Saito 1-4-1 Chuo, Wako-shi, Saitama Prefecture Inside of Honda R & D Co., Ltd. (72) Inventor Mitsuhiro Kitano 6,224 Kaiyamacho, Sakai-shi Showa Aluminum Co., Ltd. In-company (72) Inventor Yasushi Yashiro 6,224 Kaiyamacho, Sakai City Showa Aluminum Co., Ltd. (72) Inventor Tatsuharu Ono 6,224 Kaiyamacho Sakai City, Showa Aluminum Co., Ltd. (56) References Kaisho 57-142681 (JP, U) JP-A-4-80798 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62D 25/00-25/08 B62D 25/14- 25/22 B64G 1/44

Claims (3)

(57) [Claims] 1. At least two hollow panel units (2)
(3) The adjacent members of (4) and (5) are connected to each other in a V-shaped cross section or an inverted V-shaped cross section through a connection piece (6) provided along the end. The engaging portions (22) and (32) are formed at adjacent ends of the connected hollow panel units so as to engage with each other in a direction in which the hollow panel units are maintained in the developed state in a planar state. Extruded profiles for hollow panels. 2. The positional relationship between the connecting pieces (6) and the engaging portions (22) and (32) in the thickness direction of the hollow panel unit is alternately reversed for each connecting portion of the hollow panel unit. Item 6. An extruded shape for a hollow panel according to Item 1. 3. The adjacent hollow panel units (2), (3), (4) and (5) of the extruded profile (1) according to claim 1 or 2 are deformed by connecting pieces (6) to form adjacent extruded sections. A method for manufacturing a hollow panel, comprising: opening and working in a flat developed state until the engaging portions (22) and (32) engage with each other.