JP2847346B2 - Plastic door and frame and method of manufacturing the same - Google Patents

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 of manufacturing the same.

[0002]

2. Description of the Related Art For example, a conventional temporary toilet includes a base toilet tub, a floor panel installed thereon, a step board and a toilet installed on the floor panel, and a box surrounding the periphery thereof. It comprises left and right side walls and a rear wall, a roof wall, and a door that is hingedly connected to, for example, a right side wall installed on the toilet tank. In this temporary toilet, the lower ends of the left and right side walls and the rear wall are fixed to the toilet tub, and the upper ends thereof are fixed to the roof wall so that the shape of the box is maintained.

However, if attention is paid to the opening of the entrance of the box, since only the quadrilateral of the rectangular opening is fixed, if a strong lateral force is applied to the opening, the opening keeps its rectangular shape. And it may be distorted into a parallelogram (of course, the entire box is also distorted so as to be twisted). In fact, for example, when the door is opened and closed, the box is distorted every time the center of gravity of the door moves, and the box is distorted when a strong lateral wind blows and a force is applied in the lateral direction.

[0004]

On the other hand, the front face of the box is not constituted only by a door, but is opened and closed by a frame having a rectangular opening and a hinge inside the opening through a hinge or the like. By using the connecting door, assembling the front edges of the left and right side walls, the front lower edge of the roof wall, and the front upper edge of the toilet tub and the outer edge of the frame (see Example 3 described later), The distortion of the box as described above can be prevented. However, in this case, there are disadvantages such as an increase in the number of parts, which leads to an increase in manufacturing costs and troublesome assembling in the field.In addition, temporary toilets are installed outdoors, so there is no As a result, relative dimensional changes between the frame and the door are likely to occur, which causes problems such as that the door does not fit into the opening of the frame, and that the latch comes off or does not tighten.

On the other hand, recently, temporary toilets have been manufactured in which the toilet tub, floor panel, step board, side wall, rear wall, roof wall, door, and the like are molded by plastic blow molding, and each has a hollow double-wall structure. ing. By using a plastic blow molded product as a main component, a lightweight toilet with good heat insulation and low cost can be manufactured. In the case where the frame and the door are manufactured by using such plastic blow molding, the present invention hardly causes a relative dimensional change, does not increase the manufacturing cost, and is troublesome to assemble on site. The aim is to get a non-frame and door.

[0006]

SUMMARY OF THE INVENTION A plastic door and frame according to the present invention have a hollow double-walled frame having an opening and a hollow double-walled frame which is openably and closably connected to the frame inside the opening. The frame and the door are obtained by cutting off 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 through a thin boundary portion. As a preferred example, one of the left and right boundary portions is left as a hinge connecting the door and the frame.

The method of manufacturing a plastic door and frame according to the present invention is a method of manufacturing a hollow double-walled door and its frame by blow molding of plastic. By compressing, welding and thinning by closing the door, a blow molded body in which the door is integrally connected to the door frame and its inner opening through a thin boundary portion is formed, and a part of the boundary portion or The door and its frame are obtained by cutting off the entirety. As a preferred example, a hinge connecting the door and the frame is left, leaving one of right and left borders.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment 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. Each of the door 11 and the frame 12 has a hollow double wall, and a thin boundary portion is formed inside the frame 12. The door 11 is integrally formed through the door 13. This boundary portion 13
When the pair of blow molding dies are closed, they are compressed on the inner surface of the cavity of the dies, and the two walls are welded to each other to reduce the thickness. FIG. 2 shows that the boundary portion 13 is cut off to separate the door 11 and the frame 12, and a handle 14 is provided on the door 11 side according to a conventional method.
And the latch 15 and attach the latch 15 to the frame 12 side.
The door 11 is made openable and closable within the opening 18 of the frame 12 by attaching a locking portion 16 and a hinge 17.

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 were deformed by sunlight or heat, the dimensions would change at the same rate, causing troubles such as the door not being able to be locked or the latch coming off or not being locked. Does not occur. Since the door and frame are set, it is easy to assemble on site, and there is no need to adjust hinges and latches, so it can be assembled in a short time. In the method of molding the door and the frame separately, it is necessary to prepare each mold, and two blow moldings are required to perform one set molding, and the entire inside of the opening of the frame is cut off. It is necessary to recycle this, but by simultaneously molding the door and the frame, only one mold is required and one set molding can be performed with one blow molding.
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 a boundary portion 2 between the door 21 and the frame 22.
3 differs from the first embodiment only in that the right boundary portion 23a is formed flush with the surfaces of the door 21 and the frame 22. FIG. 4 shows a state in which the boundary portion 23 is cut away except for the right boundary portion 23a, the handle 24 and the latch 25 are attached to the door 21 as in the first embodiment, and the locking portion 26 of the latch 25 is attached to the frame 22 side. It is.

In this embodiment, in addition to the above-mentioned advantages of the first embodiment, there is an advantage that the boundary portion 23a left uncut functions as a hinge, and it is not necessary to separately attach a hinge. This boundary portion 23a is compressed on the inner surface of the cavity of the mold when the pair of blow molds is closed,
Since both walls are welded and thinned portions, the plastic molecules are oriented in the direction of compression, and have high strength, high flexibility, and suitably function as hinges.

(Embodiment 3) FIG. 5 shows a temporary toilet using a door and a frame according to the present invention. A toilet tub 1, a floor panel 2 installed thereon, and a floor panel 2
It comprises a step 3 and a toilet 4 installed on the upper side, and a box 5 surrounding the periphery thereof. The box 5 includes left and right side walls 6, 7 and a rear wall 8, a roof wall 9, a frame 3,
And an openable and closable door 31 supported by a pipe 33 penetrating vertically in a frame 32. The box 5 has strength by the front 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 tub 1, and the outer edge of the frame 32 being attached to each other. It is high and is prevented from being twisted even when a lateral force is applied.

[0013] The present invention provides a door, a temporary bath, a partition when the room is partitioned by a partition, in addition to a temporary toilet.
The present invention can be similarly applied to doors for shower rooms, unit baths, sheds, etc., 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 changes are less likely to occur, and molding can be performed at once with one mold. You can get frames and doors that do not require extra costs and that are easy to assemble locally.

[Brief description of the drawings]

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

FIG. 2 is a front view (a), a cross-sectional view (b), and a vertical cross-sectional view (c) of the door and 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 a door and a frame according to a second embodiment;
It is a cross-sectional view (b) and a vertical cross-sectional view (c).

4 is a front view (a), a 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 hinges and the like are 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 Door 12, 22, 32 Frame 13, 23 Boundary part 23a Thin hinge

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ identification code FI // B29L 22:00 (58) Field surveyed (Int.Cl. ⁶ , DB name) B29C 49/00-49/80 B29C 51 / 00-51/46 B29C 43/02-43/58 B29C 69/00 E06B 3 / 36,3 / 70-3/78 E04H 1/12 301 B29L 22:00

Claims (4)

(57) [Claims] 1. A hollow double-walled frame having an opening and a hollow double-walled door that is openably and closably connected to the frame inside the opening, wherein the frame and the door comprise a frame and an inner opening thereof. A plastic door and frame, wherein a part or all of the boundary portion of a plastic blow molded body in which a door is integrally connected to a portion through 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 this is a hinge connecting the door and the frame. 3. Hollow 2 by blow molding of plastic
When manufacturing a heavy-walled door and its frame, the door is thinned to the door frame and its inner opening by compressing, welding and thinning the boundary between the frame and the door by closing the blow molding mold. A method for manufacturing a plastic door and frame, comprising forming a blow molded body integrally connected via a boundary portion, and cutting off a part or all of the boundary portion to obtain a door and a frame thereof. 4. The method for manufacturing a plastic door and frame according to claim 3, wherein a left or right boundary portion is left as a hinge for connecting the door and the frame.