JP2001239571A - Resin-made hollow molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin-made hollow molding which shows high cushioning property and a high degree of secure reinforcing effect and deformation preventing effect. SOLUTION: A rib 4 which projects from one of the walls 2 of a duct 1 to the other wall 3 in such a way that the rib 4 is spaced opposingly from the other wall 3 is provided. In addition, the other rib 5 is also provided which juts out of the other wall 3 of the duct 1 to the wall 2 in such a manner that the rib 5 is spaced opposingly from the wall 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile article such as a headrest, an armrest, a cargo floor box lid, a duct, an interior wall of a building, a partition, a door, and the like.
The present invention relates to a hollow molded article made of resin such as various ducts for air conditioning.

[0002]

2. Description of the Related Art Conventionally, plastic articles of this kind, in particular, automobile articles such as headrests, armrests, cargo floor box lids, ducts, etc., are often made of resin hollow molded articles. The molded body has a structure in which a rib for integrally connecting both walls is formed between a front wall and a back wall in order to have required strength and rigidity (see Japanese Patent Application Laid-Open No. 5-254002).

[0003]

Problems to be Solved by the Invention JP-A-5-25
Since the front wall and the back wall are integrated by a rib like a duct made of a resin hollow body shown in JP-A-4002,
Although it has high strength and rigidity, it is inferior in shock-absorbing properties, and is used in places where the head of the occupant may hit at the time of impact, such as a duct concealed in the ceiling of a vehicle compartment. Is not suitable for safety.

For this reason, conventionally, as shown in FIG. 5, opposed ribs d and e are formed at an interval from one wall b and the other wall c constituting the duct a, and both ribs are formed. An opposing interval f between d and e is provided to improve cushioning against the impact by the deformation restoring action by the impact of the duct a, and when an excessive load is applied,
As shown in FIG. 5, a configuration in which opposing ribs d and e are in contact with each other to prevent a reinforcing effect and deformation has been developed.

However, in the configuration shown in FIG. 5, when the duct is slightly deformed or the deformation is repeated in a wavy manner, the opposing ribs d and e exceed the contact limit and shift greatly. As a result, it was found that the reinforcing effect and the deformation preventing effect could not be expected.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and does not deal with the ribs provided on one wall and the other wall, but on the other hand. And one rib protruding toward the wall and facing the other wall at an interval, and the other rib projecting from the other wall toward the one wall and opposing the one wall at an interval, respectively. By providing, not only the cushioning property is excellent, but also when an excessive load is applied, one wall and the other wall are surely supported by the ribs formed respectively, so that a reliable and high reinforcing effect is obtained. It is an object of the present invention to provide a resin hollow molded article capable of obtaining a deformation preventing effect.

[0007]

A resin hollow molded article according to claim 1 of the present invention is a resin hollow molded article obtained by blow molding a thermoplastic resin, wherein one wall and the other wall facing each other are provided. One rib protruding from one wall toward the other wall and facing the other wall at an interval, and one rib protruding from the other wall toward the one wall. It is characterized by being provided with the other ribs facing each other at intervals.

According to a second aspect of the present invention, there is provided a resin hollow molded body according to the first aspect, wherein one rib is a concave rib in which a part of one wall is formed in a concave shape, and the other rib is a concave rib. It is a concave rib in which a part of the other wall is formed in a concave shape.

According to a third aspect of the present invention, there is provided a resin hollow molded body according to the first or second aspect, wherein one of the ribs and the other rib are formed close to and parallel to each other. It is assumed that.

According to a fourth aspect of the present invention, in the resin hollow molded body according to the first, second or third aspect, the tip of one rib is provided on the other wall and the tip of the other rib is provided. For the portion, a stopper is provided on one of the walls to prevent lateral displacement of the one wall and the other wall in the projecting direction of the rib.

[0011]

FIG. 1 is a perspective view showing an air conditioning duct as an example of a hollow body according to an embodiment of the present invention. FIG. 2 is a perspective view showing a part of the duct shown in FIG. 3 is a perspective view of a part of the duct showing a deformed state, and FIG. 4 is a perspective view of a part of the duct according to another embodiment of the present invention.

1 to 3, reference numeral 1 denotes a duct, and the duct 1 is formed by blow molding a thermoplastic resin. Between one wall 2 constituting the duct 1 and the other opposite wall 3, one of the ones protruding from the one wall 2 toward the other wall 3 and facing the other wall 3 at an interval. A rib 4 is formed on the other wall 3
The other rib 5 protruding toward the one wall 2 and facing the one wall 2 with a space therebetween is formed. 6,6
Is a connection part of the duct 1.

The one rib 4 is a concave rib in which a part of the other wall 3 is formed in a concave shape, and the other rib 5 is a concave rib in which a part of one wall 2 is formed in a concave shape. The one rib 4 and the other rib 5 are formed close to and parallel to each other.

Further, the one rib 4 and the other rib 5 have the same height, and the degree of deformation of the duct 1 can be adjusted by changing the height.
The degree of impact absorption can be selected according to the material, shape, etc. of the duct 1.

The thermoplastic resin constituting the duct 1 according to the present invention is not limited as long as it can be blow-molded. However, high-density polyethylene resin, medium-density polyethylene resin, polypropylene resin, modified polyphenylene oxide resin, polycarbonate resin, polyamide Resins, polystyrene resins, ABS resins and the like are preferred.

In the duct 1 configured as described above, one rib 4 formed on one wall 2 faces the other wall 3 at an interval, and the other rib 4 formed on the other wall 3 is formed. The ribs 5 face the one wall 2 at an interval, so that the duct 1 is excellent in cushioning against external impact.

When an excessive load is applied to the duct 1, one wall 2 and the other wall 3 as shown in FIG.
Is greatly deformed in the direction of the arrow, at which time one rib 4 abuts the other wall 3 and the other rib 5 abuts the one wall 2 to support the one wall 2 and the other wall 3 with each other. A reliable and high reinforcing effect and deformation preventing effect can be obtained. When the excessive load is no longer applied to duct 1,
Is naturally restored to the state shown in FIG.

A duct 1 according to another embodiment of the present invention shown in FIG. 4 is provided on the other wall 3 for the tip of one rib 4 and on the other wall 3 for the tip of the other rib 4. One wall 2
Are provided with stoppers 7 for preventing lateral displacement of the one wall 2 and the other wall 3 with respect to the projecting direction of the rib. The stoppers 7, 7 are formed in a concave or projecting shape so that the wall surface extends in the direction of the rib. The other configuration is the same as that shown in FIGS.

In the structure shown in FIG. 4, one rib 4 abuts against the other wall 3 and the other rib 5 abuts against the wall 2 against the lateral deformation of the duct 1. 1 to 3 are similar to those shown in FIGS. 1 to 3, except that one rib 4 abutting on the other wall 3 and the other rib 5 abutting on one wall 2 are provided with stoppers 7, 7, respectively. Therefore, the deformation of the duct 1 in the lateral direction can be suppressed within a certain range. For this reason, the reinforcing effect and the deformation preventing effect of the duct 1 are further improved.

[0020]

According to the present invention, it is not the correspondence between the ribs provided on one wall and the other wall, but the rib protrudes from one wall toward the other wall and faces the other wall at an interval. By providing one rib and the other rib protruding from the other wall toward the one wall and facing the one wall at an interval, not only the cushioning property is excellent, but also an excessive load To provide a resin hollow molded body that ensures that one wall and the other wall are securely supported by the ribs formed on each of the walls to provide a reliable and high reinforcing effect and deformation preventing effect. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an air conditioning duct as an example of a hollow body according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a part of the duct shown in FIG.

FIG. 3 is a partial perspective view showing a modified form of the duct of FIG. 2;

FIG. 4 is a perspective view showing a part of a duct according to another embodiment of the present invention.

FIG. 5 is a partial perspective view showing a conventional air conditioning duct.

FIG. 6 is a partial perspective view showing a modified form of the duct of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Duct 2 One wall 3 The other wall 4 One rib 5 The other rib 6 Connection part 7 Stopper

Claims (4)

[Claims] 1. A resin hollow molded article obtained by blow molding a thermoplastic resin, wherein the hollow molded article protrudes from one wall toward the other wall between one wall and the other wall facing each other. It is characterized in that one rib opposing the other wall at an interval and the other rib projecting from the other wall toward the one wall and opposing the one wall at an interval are provided. Hollow molded body made of resin. 2. One of the ribs is a concave rib having a part of one wall formed in a concave shape, and the other rib is a concave rib having a part of the other wall formed in a concave shape. Item 2. A resin hollow molded article according to Item 1. 3. The resin hollow molded article according to claim 1, wherein the one rib and the other rib are formed close to each other and parallel to each other. 4. The one wall and the other wall with respect to the projecting direction of the rib, respectively, on the other wall with respect to the tip of one rib, on one wall with respect to the tip of the other rib. 4. The resin hollow molded article according to claim 1, further comprising a stopper for preventing lateral displacement.