JP2538513Y2 - Synthetic resin hollow plate - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a synthesis method in which a pair of opposing walls are separated from each other by blow molding of a thermoplastic synthetic resin, the peripheral end walls are welded to each other to form a hollow portion, and a reinforcing material is inserted inside. The present invention relates to a resin hollow plate, and is used for a housing of electronic equipment, a housing building material, a plate material of furniture, and the like.

[0002]

2. Description of the Related Art Heretofore, as this kind of synthetic resin hollow plate, for example, the one described in Japanese Utility Model Laid-Open No. 63-51719 is known. FIG. 8 is a partially cutaway perspective view of a conventional synthetic resin hollow plate described in the above publication. In this figure, reference numeral 101 denotes a hollow plate formed by blow molding of a thermoplastic synthetic resin;
Numeral 2 is a hollow portion of the hollow plate body 101. A large number of joining portions 105 are provided on the hollow plate body 101 in order from one end to the other end thereof by joining a part of one opposing wall 103 to the other opposing wall 104 in order. The support portion 106 is formed, and the hollow plate 10
1 from one end surface to the other end surface of a pipe-shaped reinforcing member 107
Are inserted so as to sequentially penetrate the plurality of support portions 106.

[0003] In the conventional synthetic resin hollow plate having the above-described structure, the supporting portion 10 is preliminarily formed at the time of blow molding.
6 is formed smaller than the outline of the reinforcing member 107, and then the reinforcing member 107 is driven from one end of the hollow plate 101 into a large number of support portions 106 inside the hollow plate 101, thereby supporting the hollow plate 101. The reinforcing member 107 is firmly fixed to the portion 106, and the reinforcing member 107 is integrated with the hollow plate body 101 to improve the strength.

[0004]

However, in the conventional hollow plate made of synthetic resin of this type, since many support portions 106 of the blow-molded hollow plate 101 are smaller than the outline of the reinforcing member 107, the reinforcing member When inserting the support member 107, the support portion 106 must be pushed so as to be spread by the reinforcing member 107. This operation is not easy, and especially in the case where a large number of support portions 106 are provided, the reinforcing member 10
There was considerable difficulty in sequentially inserting 7 into them. However, if larger the inner contour of the support portion 106, insertion of the reinforcement member 107 can be easily and impair the integration of the hollow plate member 101 and the reinforcing member 107, reduces the reinforcing effect by the reinforcing member 107 Therefore, a material having sufficient strength cannot be obtained.

The present invention has been made in order to solve such a conventional problem, and the inner contour of the support portion is made stronger with respect to the contour of the reinforcing member for the hollow plate body after blow molding. It is an object of the present invention to provide a synthetic resin hollow plate having high strength, which enables a reinforcing material to be easily and reliably inserted into a supporting portion even if formed to be small enough to be supported.

[0006]

Means for Solving the Problems The present invention is constituted as follows as technical means for achieving the object. That is, a pair of opposing walls are separated from each other by blow molding of a thermoplastic synthetic resin, and peripheral end walls thereof are welded to each other to form a hollow portion. A support portion for at least two reinforcement members is formed in the hollow portion of the plate body in the direction of insertion of the reinforcement member, and a guide portion for the reinforcement member is formed between the support portions. And the inside contour of the guide portion is a synthetic resin hollow plate formed larger than the contour of the reinforcing member.

Further, in a synthetic resin hollow plate body in which a pair of opposing walls are separated by blow molding of a thermoplastic synthetic resin and their peripheral end walls are welded to each other to form a hollow portion, and a reinforcing material is inserted therein. An opposing wall is formed in the hollow portion of the hollow plate body by projecting an opposing wall into the hollow portion to maintain an interval, and elasticity is maintained in the expanding direction by the opposing holding wall.
A synthetic resin hollow plate is formed by forming a support portion of a reinforcing material having an opening portion for making the hollow portion.

[0008]

A reinforcing member is inserted into the blow-molded hollow plate body. A guide portion having an inner contour larger than that of the reinforcing member is formed between at least two support portions. Therefore, even if the inner contour of the supporting portion is formed smaller than the contour of the reinforcing material, the reinforcing material penetrating one supporting portion is guided by the guide portion and correctly reaches the next supporting portion,
Penetrate the support.

In the case where the opposing wall is projected into the hollow portion at the time of blow molding to form the opposing holding wall to form the support portion of the reinforcing material, the supporting portion has elasticity in the expanding direction, Is inserted while elastically expanding the support portion.

[0010]

Embodiment 1 FIG. 1 is a perspective view showing an embodiment of the present invention, in which 1 is a hollow plate, and this hollow plate 1 is formed by a pair of opposing members by blow molding of a thermoplastic synthetic resin. A hollow portion 6 is formed by welding the peripheral end walls 4 and 5 to each other with the walls 2 and 3 separated from each other, and a reinforcing member 7 is inserted inside the hollow portion 6.

That is, as shown in detail in FIG. 2, a pair of opposing walls 2 and 3
A support portion 8 formed by welding and joining so as to be depressed in the direction to form a cylindrical shape is formed on one end, the other end and an intermediate portion thereof in a straight line from one end to the other end. As shown in detail in FIG. 4, a guide portion 9 is formed in which a pair of opposing walls 2 and 3 are depressed toward each other in the direction of the hollow portion 6 and the inner contour is cylindrical. Reinforcement 7
Is made of a metal pipe having a circular cross section, and the support portion 8 has an inner contour, as shown in FIG.
The guide portion 9 has an inner contour slightly larger than that of the reinforcing member 7. Then, the reinforcing member 7 is strongly inserted from the support portion 8 on one end side of the hollow plate body 1 so as to expand it, and is penetrated.
It is guided by the guide portion 9 to reach the support portion 8 at the intermediate portion, and penetrates the support portion 8 so as to expand it.
To the supporting portion 8 at the other end so as to spread it.

In the synthetic resin hollow plate configured as described above, the support portion 8 formed on the hollow plate 1 has an inner contour slightly smaller than the contour of the reinforcing member 7, and the guide 8 is provided with a guide. Since the inner contour of the portion 9 is formed slightly larger than the contour of the reinforcing member 7, the reinforcing member 7 is pushed through to the next supporting portion 8 by penetrating the reinforcing member 7 while expanding the supporting portion 8 at one end. It is possible to correctly move to the next support portion 8, and even if the reinforcing material 7 penetrates the support portion 8 in a tight state as shown in FIG. It can be easily inserted.

The hollow plate 1 is formed by blow molding a thermoplastic synthetic resin as described above.
And the guide part 9 is also formed at that time. Therefore, after blow molding, a hole is formed in the closed end face of the support portion 8 on one end side of the hollow plate body 1 by appropriate means, and the reinforcing member 7 is inserted from the hole and pushed forward. Also, after inserting the reinforcing member 7 in the hollow plate 1, reinforcement by ultrasonic heating or high frequency induction heating 7
By heating the resin, it is possible to melt the resin in a portion in contact with it and to integrate it with the reinforcing member 7 by welding. The surface of the metal reinforcing member 7 can be coated with the resin in advance. If this is the case, the integration of the welding becomes even stronger.

The inner contours of the support portion 8 and the guide portion 9 do not necessarily have to be the same as the contour of the reinforcing member 7, and the reinforcing member 7 is not limited to a pipe having a circular cross section.

As means for partitioning the inner contours of the support portion 8 and the guide portion 9, only one of the opposing walls 2 or the other opposing wall 3 may be depressed in the direction of the hollow portion 6. The recessed portions of the opposing walls may be alternately arranged such that the recessed portions are alternately arranged in the length direction.

When the reinforcing member 7 is inserted into the end along the peripheral end walls 4, 5 of the hollow plate 1, the depressed portion formed by one of the opposing walls 2 or the other opposing wall 3 is inserted into the peripheral end walls 4, 5 of the reinforcing member 7.
It can also be provided only on the side opposite to.

The length of the supporting portion 8 is the same as that of the hollow plate 1 of the reinforcing member 7.
And the length of the guide portion 9 is 0.5 or more with respect to the length of the reinforcing member 7 inserted into the hollow plate 1. It is preferable to set each.

Embodiment 2 FIG. 5 is a perspective view showing another embodiment of the present invention. In this other embodiment, the support portion 8 is different from that of the first embodiment.
And the structure of the guide part 9 is different. That is, the support portion 8 is formed on both side ends of the hollow plate 1, supporting
Sandwiching member 8, the hollow portion 6 direction a pair of opposing walls 2 and 3, the partition portion with an elongated rib 10 which is formed by welding formed by recessing toward the other end from one end, the opposite walls 2,3 Its hollow
To protrude into part 6 forms a counter holding wall 11 for holding the gap, there is obtained by forming a cylindrical portion 12 for inserting the reinforcing member 7 on the distal end side of the opposing retaining walls 11, the cylindrical portion 12
Has an opening to maintain elasticity in the spreading direction.
You. A guide portion 9 is formed between the two support portions 8. The inner contour of the support portion 8 is slightly smaller than the contour of the reinforcing member 7, and the inner contour of the guide portion 9 is smaller than the contour of the reinforcing member 7. It is formed somewhat large. The space between the opposing holding walls 11 is formed to be sufficiently smaller than the diameter of the reinforcing member 7.

According to the second embodiment, the reinforcing member 7 can be easily inserted by the elastic action of the opposing holding wall 11 with the supporting portions 8 spaced apart from each other, and the opposing holding wall 1 can be easily inserted.
Due to the elastic pressure contacting action of 1, the support state of the support portion 8 with respect to the reinforcing member 7 becomes strong.

[0020]

[Effects of the Invention] The present invention is configured as described above and has the following effects.

That is, in the hollow portion of the hollow plate, a support portion for at least two reinforcement members is formed in the direction of insertion of the reinforcement member, and a guide portion for the reinforcement member is formed between the support portions. The inner profile of is smaller than the profile of the reinforcement,
And since the inner contour of the guide part is formed larger than the contour of the reinforcing material, the inner contour of the supporting part is sufficiently small for the hollow plate after blow molding, even if the inner contour of the supporting part is firmly supported by the contour of the reinforcing material. Even if it is formed, the reinforcing member can be easily and surely inserted into the supporting portion, and a synthetic resin hollow plate having high strength can be obtained.

Also, in the case where the opposing wall is formed by projecting the opposing wall into the hollow portion at the time of blow molding, and the opposing holding wall forms the supporting portion of the reinforcing material, the supporting portion has elasticity in the expanding direction. Since the reinforcing member is inserted while elastically expanding the supporting portion, the inserting of the reinforcing member is easy, and the supporting state of the supporting portion with respect to the reinforcing member is achieved by the elastic pressing action of the opposed holding wall. Is strong, and a synthetic resin hollow plate body having higher strength can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line AA in FIG. 1, showing a state before a reinforcing material is inserted.

FIG. 3 is an enlarged sectional view taken along line AA in FIG. 1, showing a state in which a reinforcing material is inserted.

FIG. 4 is an enlarged sectional view taken along line BB in FIG. 1, showing a state in which a reinforcing material is inserted.

FIG. 5 is a perspective view showing another embodiment of the present invention.

FIG. 6 is an enlarged cross-sectional view taken along line CC in FIG. 5, showing a state before a reinforcing material is inserted.

FIG. 7 is an enlarged cross-sectional view taken along the line CC in FIG. 5, showing a state in which a reinforcing material is inserted.

FIG. 8 is a partially cutaway perspective view showing a conventional synthetic resin hollow plate body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hollow plate body 2 A pair of opposing wall 3 A pair of opposing wall 4 Peripheral end wall 5 Peripheral end wall 6 Hollow part 7 Reinforcement material 8 Support part 9 Guide part 10 Rib 11 Opposite holding wall 12 Cylindrical part

Claims (2)

(57) [Scope of request for utility model registration] 1. A synthetic resin hollow plate in which a pair of opposing walls are separated from each other by blow molding of a thermoplastic synthetic resin and their peripheral end walls are welded to each other to form a hollow portion, and a reinforcing material is inserted therein. Forming, in the hollow portion of the hollow plate body, support portions for at least two reinforcement members in the direction of insertion of the reinforcement member, and forming a guide portion for the reinforcement member between the support portions;
A hollow plate made of synthetic resin, wherein the inner contour of the support portion is smaller than the contour of the reinforcing material, and the inner contour of the guide portion is larger than the contour of the reinforcing material. 2. A synthetic resin hollow plate in which a pair of opposed walls are separated from each other by blow molding of a thermoplastic synthetic resin and their peripheral end walls are welded to each other to form a hollow portion, and a reinforcing material is inserted therein. An opposing wall is formed in the hollow portion of the hollow plate body by projecting the opposing wall into the hollow portion to maintain an interval, and the elasticity is maintained in the expanding direction by the opposing holding wall .
A hollow portion made of a synthetic resin, wherein a support portion of a reinforcing material having an opening portion for forming the hollow portion is formed.