JPS5850988Y2 - Hatsupoutaitsutsujiyoubutsunokouzo - Google Patents

Description

[Detailed description of the invention] This invention has a cylindrical shape when the longitudinal opening is closed, but this opening is pushed open and contents such as a pipe are attached, and the contents are cushioned and The present invention relates to the structure of a cylindrical synthetic resin foam that can provide effects such as heat insulation and heat retention.

BACKGROUND ART Conventionally, a method is known in which a portion of a cylindrical foam material is cut in the longitudinal direction, the portion is pushed open, and the cylindrical material is attached to a pipe or the like.

However, as shown in FIG. 1, these details cover a foam cylindrical object (hereinafter abbreviated as cylindrical object) 1 with a covering material 2 made of paper, film, cloth, etc. Then, wrap it so that 3 margins are left and fix it with adhesive or the like.

Adhesive material 4 is applied to the back surface of the adhesive margin 3, and a backing paper 5 is attached to that part to avoid joining to unnecessary parts.

In this embodiment, for example, after opening the opening 6 and attaching the contents such as a pipe, the opening 6 is closed, the backing paper 5 is peeled off, and the adhesive 4 is attached to the adhesive 4 to attach the contents to the cylindrical object. This involves applying it onto a covering material that is fixed to the surface and closing the opening.

In order to obtain such a conventional structure, it is necessary to go through very complicated processes such as attaching the covering material and attaching the backing paper, which makes the manufacturing price high and makes it difficult to actually use it. When applying, since the object is long, the covering material may wrinkle, the backing paper 5 may tear, and the adhesive margin 3 may adhere to unnecessary areas, deteriorating the quality of the appearance and preventing double scratches. had the disadvantage of requiring a great deal of effort and skill.

The present invention was made in view of the current situation, and aims to provide a structure for a cylindrical object that eliminates all of the above-mentioned drawbacks of cylindrical objects having conventional structures.

Hereinafter, the content of the present invention will be explained in more detail based on the drawings.

FIG. 2 is a perspective view showing one row of the cylindrical body of the present invention, and FIG. 3 is a perspective view of one row when the cylindrical body of FIG. 2 is used to cover a pipe.

In FIG. 2, the outer surface of the cylindrical object 10 has two rows of protrusions 12 and 12 facing each other across the opening 11 in the longitudinal direction.
' is provided integrally with the cylindrical member 10.

The end of the cylindrical object in the opening 11 and the engagement surface of the protrusion 12.12' may have a linear or curved shape, or may have a stepped structure that fits together, but the key is to It is desirable that the mating surfaces be in close contact.

The protrusions 12 and 12' may be continuous or discontinuous in the longitudinal direction, but it is necessary that they are provided so that 12 and 12' face each other.

The embodiments of the present invention and the cylindrical article are as follows.

That is, first, in a cylindrical object as shown in FIG. 2, the opening 11 is pushed open and attached to a pipe or the like.

Next, the opening 11 is opened and the protrusion 12, 12' is heated using an appropriate heating device, so that the protrusion melts and disappears, and at the same time the opening is thermally fused, forming a cylindrical body with a smooth surface. become.

FIG. 3 shows a state in which the opening is thermally fused, and a fusion line 13 is formed on the surface of the cylindrical object 10.

Pipe 14 is the contents. This heat-sealing operation can be performed by pressing the local area using a heating device such as an electric trowel, or by a general method such as irradiating or blowing hot air or the like.

The size of the protrusion in the present invention should be selected appropriately depending on the diameter and wall thickness of the cylindrical object.
Usually, a width of about 5 to 39 mm and a height of about 5 to 5 Q mm is practically suitable.

The standard for determining the size of the protrusion is to make it large enough to melt the protrusion and completely disappear when heating or pressing with a trowel is used when heat-sealing the opening. The upper limit is the size of the opening, and the lower limit is the size that allows the opening to be bonded with sufficient strength.

The cylindrical article of the present invention is made of a thermoplastic resin that can be melt-extruded and foamed, such as a polymer resin such as polyethylene, polystyrene, polypropylene, vinyl acetate, or a copolymer resin thereof, or acrylonitrile-butadiene-
Thermoplastic synthetic resins, such as styrene copolymer resins and acrylonitrile-styrene copolymer resins, are made by mixing blowing agents called chemical blowing agents or physical blowing agents.
It is manufactured by kneading it in an extruder, directly extruding it into the shape shown in FIG. 2, and cutting it into regular lengths.

Alternatively, it can be manufactured by extruding a cylindrical body having a protrusion during extrusion, and then continuously cutting a part of the cylindrical body from approximately the center of the protrusion, and using the cut portion as an opening.

The shape of the cylindrical body in this invention is as follows when viewed in cross section:
The object is all those whose external and internal shapes are circular or polygons larger than a triangle, but in practical terms, the most common external and internal shapes are circular or tangent circular.

Because the cylindrical object according to the present invention has the above-mentioned structure, when used for covering pipes, for example, it does not require complicated processes such as pasting a covering material, and can be used very easily, for example at construction sites. It has an outstanding effect that the opening of the tube or shaped body can be firmly joined by simply heating it, and it can be constructed with a beautiful appearance without any skill required.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of the structure of a conventional cylindrical object (pipe cover), FIG. 2 is a perspective view showing an example of the structure of the cylindrical object of the present invention, and FIG. It is a perspective view showing an example of this.

Claims (1)

[Scope of utility model registration request] A cylindrical object made of synthetic resin foam having an opening extending in the longitudinal direction, characterized in that two rows of protrusions facing each other across the opening are provided in the longitudinal direction of the outer surface of the cylindrical object. The structure of a synthetic resin foam cylindrical object.