JPH08103944A - Plastic door, frame and manufacture thereof - Google Patents

Abstract

PURPOSE: To obtain a frame and a door in which relative dimensional change scarcely occurs, excess manufacturing cost is eliminated and assembling at a building site is not troublesome when the door and the frame are manufactured by utilizing a plastic blow molding. CONSTITUTION: A blow-molded form in which a frame 22 and a door 21 of hollow double wall are integrally coupled via a thin-walled boundary part is formed, and the boundary part is cut out except the part 23a. The residual part 23a is operated as a hinge for coupling the door 21 to the frame 22. The part 23a is compressed by the inner surface of the cavity of a blow mold, and oriented in the direction for compressing plastic molecules, and hence its strength is high.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow double-walled door and frame formed by blow molding of plastic, and a method for manufacturing the same.

[0002]

2. Description of the Related Art For example, a conventional temporary toilet is composed of a base toilet bowl, a floor panel installed on it, a step and toilet bowl installed on the floor panel, and a box surrounding the box. It is composed of left and right side walls installed on the toilet bowl, a rear wall, a roof wall, and, for example, a door that is hingedly connected to the right side wall. In this temporary toilet, the left and right side walls and the lower ends of the rear wall are fixed to the toilet bowl, and the upper ends thereof are fixed to the roof wall to keep the shape of the box.

However, paying attention to the opening at the entrance of the box, the four openings of the rectangular opening are merely fixed. Therefore, when a strong lateral force is applied to the opening, the opening remains in the rectangular shape. However, there is a possibility that it will be distorted into a parallelogram (of course, the entire box will be distorted so that it can be twisted). In fact, for example, the box is distorted each time the center of gravity of the door moves when the door is opened and closed, and the box is distorted when a strong lateral wind blows and a lateral force is applied.

[0004]

On the other hand, the front surface of the box is not constituted by only the door, but the frame having a rectangular opening and the inside of the opening can be freely opened and closed by a hinge or the like. By using the doors to be connected, by assembling the front end edges of the left and right side walls, the front lower end edge of the roof wall, and the front upper end edge of the toilet bowl and the outer peripheral edge of the frame (see Example 3 described later), It is possible to prevent the distortion of the box as described above. However, in this case, there are disadvantages such as an increase in the number of parts, an increase in manufacturing cost, and a troublesome assembling at the site.In addition, since the temporary toilet is installed outdoors, it is affected by sunlight and outside temperature. There is also a problem that a relative dimensional change between the frame and the door is likely to occur and the door may not fit into the opening of the frame, or the latch may be disengaged or not tightened.

On the other hand, recently, the toilet bowl, floor panel, step, side wall, rear wall, roof wall, door and the like are molded by plastic blow molding, and a temporary toilet having a hollow double wall structure is manufactured. ing. By using a plastic blow-molded product as the main component, it is possible to manufacture a temporary toilet that is lightweight, has good heat insulation, and is low in cost. And, in the case of manufacturing the above-mentioned frame and door by utilizing such plastic blow molding, the present invention hardly causes relative dimensional change, does not require extra manufacturing cost, and is difficult to assemble on site. Aim to get not the frame and the door.

[0006]

SUMMARY OF THE INVENTION A plastic door and frame according to the present invention comprises a hollow double-walled frame having an opening and a hollow double-walled inner wall of the same which is openably and closably connected to the frame. The frame and the door are formed by cutting out a part or all of the boundary portion of a plastic blow-molded body in which the door is integrally connected to the frame and the inner opening of the frame through a thin boundary portion. It is characterized in that there is a left or right boundary part as a preferable example, and this is used as a hinge for connecting the door and the frame.

Further, in the method of manufacturing a plastic door and frame according to the present invention, when a hollow double-walled door and its frame are manufactured by blow molding of plastic, the boundary portion between the frame and the door is blow-molded. By compressing, welding and thinning by closing, the blow-molded body in which the door is integrally connected through the thin-walled boundary portion to the door frame and the inner opening thereof is formed, and a part of the boundary portion or The present invention is characterized in that the door and its frame are obtained by cutting off the whole, and as a preferable example, one of the left and right boundary portions is left and this is used as a hinge for connecting the door and the frame.

[0008]

Embodiments of the present invention will be described below with reference to FIGS. (Embodiment 1) FIG. 1 shows a door 11 and a frame 12 blow-molded from a plastic parison. The door 11 and the frame 12 both have hollow double walls, and a thin boundary portion is provided inside the frame 12. The door 11 is formed integrally via 13. This boundary portion 13 is
When the pair of blow molding dies are closed, they are compressed by the inner surface of the cavity of the dies, and the two walls are welded and thinned. In FIG. 2, the boundary portion 13 is cut off to separate the door 11 and the frame 12, and a handle 14 is attached to the door 11 side in accordance with a conventional method.
Attach the latch 15 and the latch 15 on the frame 12 side.
The locking portion 16 is attached, and the hinge 17 is further attached so that the door 11 can be opened and closed in the opening 18 of the frame 12.

In this embodiment, since the door 11 and the frame 12 are integrally blow-molded, there are the following advantages. Since the door and frame were originally integrally molded at the same time, even if they are deformed by sunlight or heat, the dimensions change at the same rate, causing problems such as the door not tightening, the latch coming off or not tightening. Does not occur. Since the door and frame are a set, they can be easily assembled on-site, and since adjustment of hinges and latches is not required, they can be assembled in a short time. If it is a method of molding the door and the frame separately, it is necessary to prepare each mold, two blow moldings are required to mold one set, and the entire inside of the frame opening is cut off. It is necessary to recycle this, but by molding the door and frame at the same time, only one mold is required, and one blow molding can be done in one set.
Also, there is almost no loss.

(Embodiment 2) FIG. 3 shows a door 21 and a frame 2 which are also blow molded from a plastic parison.
2 shows the boundary portion 2 between the door 21 and the frame 22.
The third embodiment differs from the first embodiment only in that the boundary portion 23a on the right side of 3 is formed flush with the surface of the door 21 or the frame 22. In FIG. 4, the boundary portion 23 is cut off leaving the boundary portion 23a on the right side, the handle 24 and the latch 25 are attached to the door 21 and the locking portion 26 of the latch 25 is attached to the frame 22 side as in the first embodiment. Is.

In addition to the above-mentioned advantages of the first embodiment, the present embodiment has an advantage that the boundary portion 23a left uncut acts as a hinge and it is not necessary to attach a separate hinge. The boundary portion 23a is compressed on the inner surface of the cavity of the mold when the pair of blow molding molds are closed,
Since both walls are welded and thinned, the plastic molecules are oriented in the compressed direction to have high strength, high flexibility, and suitable function as a hinge.

(Embodiment 3) FIG. 5 shows a temporary toilet using a door and a frame according to the present invention. Toilet bowl 1, floor panel 2 installed on it, and floor panel 2
It consists of a pedestal 3 and a toilet 4 installed on the top, and a box 5 surrounding it, and the box 5 includes left and right side walls 6 and 7 installed on the toilet bowl 1, a rear wall 8, a roof wall 9, and a frame 3.
2 and an openable / closable door 31 supported by a pipe 33 that penetrates vertically in the frame 32. The strength of this box 5 is improved by assembling the front side edges of the left and right side walls 6 and 7, the front lower edge of the roof wall 9, the front upper edge of the toilet bowl 1 and the outer peripheral edge of the frame 32 to each other. It is high and is prevented from twisting like a twist even if a lateral force is applied.

In addition to the temporary toilet, the present invention is also applicable to doors, temporary buses, etc. when the interior is partitioned by partitions.
The same can be applied to shower rooms, unit baths, doors of sheds, prefabricated houses and prefabricated offices.

[0014]

According to the present invention, when a door and its frame are manufactured by using plastic blow molding, relative dimensional change is unlikely to occur, and one mold can be used for molding at one time. It is possible to obtain a frame and door that does not cost too much and is easy to assemble locally.

[Brief description of drawings]

FIG. 1 is a front view of a door and a frame according to a first embodiment (a),
It is a horizontal sectional view (b) and a vertical sectional view (c).

2 is a front view (a), a horizontal sectional view (b), and a vertical sectional view (c) of the door and the frame of FIG. 1 when a boundary portion is cut off and a hinge or the like is attached.

FIG. 3 is a front view (a) of the door and the frame of the second embodiment,
It is a horizontal sectional view (b) and a vertical sectional view (c).

FIG. 4 is a front view (a), a horizontal cross-sectional view (b), and a vertical cross-sectional view (c) of the door and frame of FIG. 3 when a boundary portion is cut off and a hinge or the like is attached.

FIG. 5 is a perspective view of a temporary toilet to which the door and the frame of the present invention are applied.

[Explanation of symbols]

 11, 21, 31 Doors 12, 22, 32 Frames 13, 23 Boundary 23a Thin hinge

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B29C 69/00 2126-4F E06B 3/78 // B29L 22:00

Claims (4)

[Claims] 1. A hollow double-walled frame having an opening and a hollow double-walled door which is openably and closably connected to the frame inside the opening, the frame and the door being the frame and its inner opening. A plastic door and frame, characterized in that a part or all of the boundary portion of a plastic blow-molded body integrally connected to the portion via a thin boundary portion is cut off. 2. The plastic door and frame according to claim 1, wherein a left or right boundary portion is left and is used as a hinge for connecting the door and the frame. 3. Hollow 2 formed by blow molding of plastic
In the case of manufacturing a heavy-walled door and its frame, the boundary between the frame and the door is compressed by closing the blow molding die to weld and thin the wall, thereby reducing the thickness of the door frame and its inner opening. A method of manufacturing a plastic door and a frame, characterized in that a blow molded body that is integrally connected through a boundary portion is formed, and the door and the frame thereof are obtained by cutting off a part or all of the boundary portion. 4. The method of manufacturing a plastic door and frame according to claim 3, wherein either the left or right boundary portion is left and is used as a hinge for connecting the door and the frame.