JPH07213446A - Wind-up heat retaining lid - Google Patents

Abstract

PURPOSE:To provide the heat retaining lid enhancing both the strength of each slender cylindrical body and its heat retaining property by filling high foaming resin into each slender cylindrical body a plurality of which are disposed in parallel, and have each mutual interval tied with each connecting piece made of soft synthetic resin. CONSTITUTION:A plurality of slender cylindrical bodies 1,... which are lined up in parallel at equal intervals, and thin connecting pieces 2 each of which is located between the slender cylindrical bodies 1 and 1, are extruded into a filament out of synthetic resin so as to be formed into one unit for a bath tub lid. One piece of the bath tub lid is thereby made up by connecting one unit with the other unit at the connecting pieces 2 provided for both the sides of each slender cylindrical body so as to be integrated. In this case, each slender cylindrical body 1 is formed into a hollow body in a shape of a trapezoid in cross section of length as specified, and its inside is divided into two room along the longer direction by a partitioning wall 1a. Let the lid stand up in a state that one end (lower end) of each slender cylindrical body 1 is blocked off by a blocking body, unfoamed resin of high foaming resin 10 is injected into the upper end opened section of each slender cylindrical body 1, and the unfoamed resin is then foamed, so that a desired heat retaining lid is thereby formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractable heat-insulating lid, and more particularly to a wind-up lid made of synthetic resin, such as a bath lid, in which a large number of oblong tubular bodies are connected in parallel by thin connecting pieces. The present invention relates to a thermal insulation lid.

[0002]

2. Description of the Related Art As shown in FIG. 1, a conventional bath lid as a winding type heat retaining lid is an elongated tubular body having a substantially trapezoidal cross section.
In general, a large number of (1) are arranged in parallel and their lower sides are integrally connected by a thin connecting piece (2) made of a soft resin. In this one, an elongated cylinder
A flexible connecting piece between (1) and the elongated tube (1).
Since (2) is interposed, the entire bath lid can be wound up in the connecting direction of the elongated tubular bodies (1) and (1) when not in use. Each of the elongated tubular bodies (1) is hollow, and the open portions at both ends thereof are closed by the closing bodies (3). As shown in FIG. 3, the closing body (3) is an elongated tubular body (1).
From a lid portion (33) that substantially matches the cross-sectional shape of the leg portion (31) protruding from the lid portion (33) toward the elongated tubular body (1) and contacting the inner peripheral wall of the elongated tubular body (1). After the leg portion (31) is fitted into the elongated tubular body (1), the open end of the elongated tubular body (1) and the back surface of the lid portion (33) are subjected to high frequency welding or adhesion. It is attached.

In this conventional standard type, as shown in FIG. 1, since the inside of the elongated cylinder (1) is hollow,
In addition, since the section modulus of the elongated tubular body (1) is relatively small,
There is a problem that the bending strength is insufficient and it is easily cracked by an external impact. Also, if it breaks, the fragments of the elongated cylinder (1) will be scattered and dangerous. In order to solve this problem, as shown in FIG. 2, there is a reinforced type in which the entire elongated tubular body (1) is molded into a thick wall. Although this product is less likely to be damaged by an external impact, it requires more resin than that of FIG. 1 and therefore the manufacturing cost is high. Furthermore, an elongated cylinder
There is also a disadvantage that the sectional shape of (1) becomes large and the weight of the entire bath lid increases, which makes it difficult to handle.

Further, in the prior art, in order to prevent the inconvenience that the air in the elongated cylindrical body (1) expands to a high pressure state when the bath lid is heated by the steam from the hot water in the bathtub. In addition, as shown in FIG. 3, the closing body (3) is provided with a small hole (30) for venting air which communicates with the inside of the elongated tubular body (1). The small holes (30) allow air to flow in and out of the elongated tubular body (1), so that an increase in internal pressure of the elongated tubular body (1) can be suppressed. The small hole (30) can also be used to discharge water droplets inadvertently entering the elongated tubular body (1) from the gap between the closing body (3) and the elongated tubular body (1). it can.

However, conversely, from this small hole (30),
Because the warm air in the elongated cylinder (1) escapes,
In addition, since the air insulation effect is significantly reduced by this air convection, there is a problem that the bath lid lacks heat retention. The present invention has been made in view of such points,
In a `` winding type heat retention lid formed by arranging a large number of hollow elongated tubular bodies (1) in parallel at regular intervals and connecting them with a connecting piece (2) made of soft synthetic resin, '' An object is to enhance the strength and heat retention of the elongated tubular body (1). [Claim 1]

[0006]

[Technical Means] A technical means of the present invention for solving the above-mentioned problems is to "fill the elongated tubular body (1) with a highly foamed resin (10)".

[0007]

The above technical means operates as follows. Since the highly foamed resin (10) is filled in the elongated tubular body (1), the elongated tubular body (1) is solid. Therefore, even when the wall thickness of the elongated tubular body (1) is thin, when the bending force acts on the elongated tubular body (1), the wall itself does not easily bend.

Since the high-foamed resin (10) is light in weight and rich in heat retention, the high-foamed resin (10) is contained in the elongated tubular body (1).
Even if it is filled with
In addition, the entire heat retaining lid functions as an adiabatic heat retaining layer.

[0009]

[Effects] The rigidity of the elongated tubular body (1) is improved because the constituent wall of the elongated tubular body (1) does not easily bend inward even when an external impact is applied. Therefore, the strength of the heat retaining lid is increased without increasing the height or wall thickness of the elongated tubular body (1). Therefore, even if the elongated tubular body (1) has a flat or thin cross section, the same strength as that of the conventional reinforced type can be obtained.For example, when it is used as a lid of a hot water tank containing high-temperature hot water, It is also possible to avoid the risk that the lid will bend and fall into the bath when a hand is placed on it. In addition, even if the elongated tubular body (1) is damaged, the fragments of the elongated tubular body (1) are connected through the highly foamed resin (10), so there is no risk of scattering to the surroundings.

Even when the elongated tubular body (1) is filled with the high-foamed resin (10), since the weight of the entire heat retaining lid does not increase, there is no problem that it is heavy and difficult to handle. Due to the heat insulation effect, the whole heat insulation lid will function as a heat insulation heat insulation layer.
The warmth of hot water is improved. Also, the elongated cylinder (1) and the connecting piece (2)
After molding, the long tubular body (1) is simply filled with the synthetic resin of the high-foamed resin (10) and foamed, so that the production is easy and the production is inexpensive. [Claim 2] The invention of claim 2 solves the same problem as in claim 1 and prevents water from entering the elongated tubular body (1).

[0011]

[Technical Means] The technical means of the invention of claim 2 taken for that purpose is that "the highly foamed resin (10) is of a closed cell type".
That is.

[0012]

[Operation / Effect] Since the highly foamed resin (10) is of the closed-cell type, even if water enters the elongated tubular body (1), it does not penetrate into the highly foamed resin (10) as a whole. Therefore, even if a gap is created at the open end of the elongated tubular body (1) or if a crack is generated on the surface of the elongated tubular body (1), water will not flow into the elongated tubular body (1) from the gaps or cracks. There is no inconvenience.

[0013]

Embodiments of the present invention described above will now be described in detail with reference to the drawings. The embodiment of the present invention is applied to a roll-up type bath lid. This one, like the conventional bath lid, has a plurality of elongated cylinders (1) (1) arranged in parallel at intervals,
One unit of the bath lid by integrally molding the thin connecting pieces (2) (2) located between the elongated tubular bodies (1) (1) and connecting them by extrusion molding of synthetic resin And connecting pieces (2) provided on both sides of the unit.
By (2), one bath lid is constructed by connecting and integrating with other units.

Each elongated tubular body (1) is molded into a hollow body having a predetermined length and a substantially trapezoidal cross section, and the inside thereof is
As shown in FIG. 4, it is divided into two chambers along the longitudinal direction by the partition wall (1a), and the size and wall thickness of its cross section are set to be equal to those of the conventional standard type. .
The adjacent lower ends of these elongated cylinders (1) (1) are connected to each other by the connecting piece (2).
Are linked by.

The closing bodies (3a) and (3b) for closing both ends of each elongated tubular body (1) of the unit molded as described above are the cross sections of the elongated tubular body (1) as in the conventional ones. The lid (33) conforms to the shape and the leg (31) extended from the lid (33) so as to come into contact with the inner peripheral wall of the elongated tubular body (1). In this embodiment, first, the closing body (3a) is attached to only one open end of the elongated tubular body (1) by high frequency welding. The closing body (3a) is not provided with a small hole for venting air as in the conventional example.

In this way, the bath lid unit in which only one end of the elongated tubular body (1) (1) is closed by the closing body (3a),
As shown in FIG. 5, the obstruction body (3a) is erected so as to be the lower end, and the nozzles (61) (61) of the filling device (6) are respectively provided at the upper end open portions of the elongated tubular body (1). Correspondingly, the unfoamed resin for the highly foamed resin (10) is filled into the two chambers of each elongated tubular body (1) through the nozzles (61) and (61).

In this embodiment, as the high-foam resin (10),
Urethane foam resin, for example 50% polyol and 50
Adopts a closed-cell type high-foaming resin composed of 100% isocyanate. The expansion ratio of this high-foam resin (10) is
Since it is 30 times, the unfoamed resin may be filled up to a height of 1/30 of the length of the elongated tubular body (1).

After the highly foamed resin (10) in the elongated tubular body (1) is sufficiently foamed and cured, the protruding portion is trimmed from the upper end open portion of the elongated tubular body (1), and the elongated tubular body (1) is cut. The open end of is closed by a closing body (3b) having a small hole (30). Highly foamed resin (10) is filled in the elongated tubular body (1), but by forcibly inserting the leg portion (31) of the closing body (3b) into the elongated tubular body (1), The back surface of the lid (33) of the closing body (3b) is an elongated tubular body.
The closing body (3b) can be attached to the other end of the elongated tubular body (1) so as to be in contact with the open end of the (1).

Then, connecting pieces on both sides of each bath lid unit
(2) (2) By welding the two to each other, the bath lid in which the high-foamed resin (10) is filled in each elongated tubular body (1) is completed.
By filling the long tubular body (1) with the high-foaming resin (10), the rigidity of the bath lid as a whole is improved and it becomes difficult to bend. Therefore, as shown in FIG. 6, the bathtub (4) is closed. When I let
There is no inconvenience that the bath lid will bend and fall into the bathtub (4) even if pressure is applied to the center of the bath.

Since the high-foamed resin (10) is so light that it is almost unnecessary to consider its weight, even if the high-foamed resin (10) is filled in the elongated tubular body (1), the entire bath lid will be Weight gain is kept low. Also, in order to obtain strength, an elongated cylinder (1)
Since it is not necessary to make it thick, it can be handled such as winding like the conventional one. Further, even if the bath lid is heated by steam from the hot water in the bathtub, the elongated tubular body (1) is filled with the highly foamed resin (10) of the closed-cell type, so the elongated tubular body ( The internal pressure of 1) does not change significantly. Therefore, it is not always necessary to provide the closing body (3b) with the small hole (30) for venting air.

In this embodiment, the bath lid is used, but it goes without saying that it can also be used as a heat retaining lid for other oil tanks.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a conventional standard type bath lid.

FIG. 2 is a cross-sectional view of a conventional reinforced type bath lid.

FIG. 3 is a cross-sectional view showing a relationship between a conventional elongated tubular body (1) and a closing body (3).

FIG. 4 is a sectional view of an embodiment of the present invention.

FIG. 5 is an explanatory diagram when filling the high-foam resin (10).

FIG. 6 is a usage example of the embodiment of the present invention.

[Explanation of symbols]

 (1) ・ ・ ・ Slender tubular body (10) ・ ・ ・ Highly foamed resin (2) ・ ・ ・ Connecting piece

Claims (2)

[Claims] 1. A roll-up type heat retaining device comprising a plurality of hollow elongated tubular bodies (1) arranged in parallel at regular intervals and connected to each other by a connecting piece (2) made of a soft synthetic resin. In the lid, inside the elongated cylinder (1), the highly foamed resin (10)
Winding type heat retention lid filled with. 2. The winding type heat retention lid according to claim 1, wherein the highly foamed resin (10) is of a closed cell type.