JP3237909U - Heat shield - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat shield capable of suppressing a temperature rise inside a hat or a helmet worn on a head and maintaining a comfortable state with low humidity for a long time. SOLUTION: A heat shield 10 is formed of a heat shield sheet 1 having flexibility that can be deformed into a shape along the inner surface of a hat or a helmet, and has heat shield, moisture permeability and waterproof property. .. The heat shield sheet 1 has heat shield, moisture permeability, and waterproof properties, and has an aluminum foil having a durable coat formed on the front surface, a glass fiber layer attached to the back surface of the aluminum foil, and the opposite side of the aluminum foil. It is provided with a moisture-permeable waterproof resin layer provided on the back surface of the glass fiber layer located. The plan view shape of the heat shield sheet 1 is a rotationally symmetric shape. [Selection diagram] Fig. 1

Description

The present invention relates to a heat shield having a function of suppressing an internal temperature rise such as a hat or a helmet worn on the head.

As a device for preventing a temperature rise inside a hat or a helmet worn on the head, conventionally, devices having various shapes and functions have been proposed, but as related to the present invention, for example, patent documents. There are "heat shield sheet for head protection" described in 1 and "heat shield structure of helmet" described in Patent Document 2.

The "heat-insulating sheet for head protection" described in Patent Document 1 is composed of one or a set of sheet blocks divided into a plurality of sheets, and one side is coated with an adhesive or double-sided tape is attached to the end. Notches are provided at least in two or more places, and have a function of blocking radiant heat, which is an electromagnetic wave.

The "heat-shielding structure of a helmet" described in Patent Document 2 is a headband made of a heat-shielding sheet in which a material having a high reflectance to radiant heat such as aluminum foil, an adhesive or heat-welded layer, and a non-woven fabric or a resin sheet are laminated in this order. It is attached between the shock absorbing liner and the inside of the cap body.

Utility Model Registration No. 3213610 Utility Model Registration No. 3222405

As described above, the "heat shield sheet for protecting the head" described in Patent Document 1 and the "heat shield structure of the helmet" described in Patent Document 2 are helmets having a function of reflecting (shielding) radiant heat. By attaching to the inside (or outside) of the helmet, the temperature rise inside the helmet is suppressed, but these sheets do not have moisture permeability (breathability).

Therefore, when the "heat shield sheet for head protection" described in Patent Document 1 or the "heat shield structure of helmet" described in Patent Document 2 is used, moisture (water vapor) caused by sweating from the head or the like is used. ) Accumulates in the helmet (particularly the part between the head and the seat), and it is highly possible that sweat emission and evaporation are inhibited, and the temperature suppressing effect on the head gradually decreases.

In addition, when moisture accumulates in the helmet, the temperature inside the helmet rises, which not only causes discomfort, but also may cause heat stroke and the like. Furthermore, if the helmet is kept moist for a long time, it may adversely affect the hair and scalp.

Therefore, the problem to be solved by the present invention is to provide a heat shield capable of suppressing a temperature rise inside a hat or a helmet worn on the head and maintaining a comfortable state with low humidity for a long time. There is something in it.

The heat shield according to the present invention is characterized by having a flexibility that can be deformed into a shape along the inner surface of a hat or a helmet, and is formed of a heat shield sheet having heat shield, moisture permeability and waterproof properties. And.

Here, the hat is clothing worn on the head for the purpose of heat protection, cold protection, sand protection, decoration, etc., and the helmet is a protective cap or helmet worn on the head to protect the head from impacts and the like. However, it is not particularly limited, and includes a wide range of items such as caps and hats that cover the head.

In the heat shield, the heat shield sheet has heat shield, moisture permeability, and waterproof properties, and an aluminum foil having a durable coat formed on the surface and a glass fiber layer attached to the back surface of the aluminum foil. It is desirable that the glass fiber layer is provided with a moisture-permeable waterproof resin layer provided on the back surface of the glass fiber layer located on the opposite side of the aluminum foil.

In the heat shield, it is desirable that the plan view shape of the heat shield sheet is a rotationally symmetric shape. Here, the rotationally symmetric shape is a shape having a property of overlapping with itself when rotated by (360 / n) degrees around a certain center when n is an integer of 2 or more.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a heat shield capable of suppressing a temperature rise inside a hat or a helmet worn on the head and maintaining a comfortable state with low humidity for a long time.

It is a top view which shows the heat shield which is an embodiment of this invention. It is a front view of the heat shield seen from the direction of arrow A in FIG. It is a partially omitted sectional view in line BB in FIG. It is a figure which shows typically the state which the heat shield shown in FIG. 1 is attached in the hat. It is a figure which shows typically the state which the heat shield shown in FIG. 1 is attached in the helmet.

Hereinafter, the heat shield 10 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 5.

First, the shape, structure, and the like of the heat shield 10 will be described with reference to FIGS. 1 to 3. As shown in FIGS. 1 and 2, the heat shield 10 is formed of a flat plate-shaped heat shield sheet 1 having a four-leaf clover shape in a plan view. The heat shield sheet 1 has heat shield, moisture permeability, and waterproof properties, and has flexibility that can be deformed into a shape along the inner surface of the hat, as will be described later.

Here, the heat-shielding property is a property of reflecting radiant heat, the moisture permeability is a property of transmitting moisture (gas such as water vapor), and the waterproof property is a property of not allowing water (liquid) to pass through. Flexibility is the property of bending (bending) without cracking or breaking when an external force is applied, and in the present invention, it is the property of bending when an external force equivalent to that of a human hand is applied. ..

As shown in FIG. 1, the heat shield sheet 1 constituting the heat shield 10 has a shape in which sharply pointed portions of four hearts are gathered at one point (center 1c) and united with each other. When rotated 90 degrees around the center 1c, it forms a "90 degree rotationally symmetric shape" that overlaps with itself. Since the shape is not limited to the "90-degree rotationally symmetric shape", other rotationally symmetric shapes such as a 45-degree rotationally symmetric shape and a 60-degree rotationally symmetric shape can be used.

A deep cut portion 1a and a shallow cut portion 1b are formed on the outer periphery of the heat shield sheet 1 at intervals of 45 degrees with respect to the center 1c, and a smooth plan view is provided between the cut portion 1a and the cut portion 1b. The shape is projected in the shape of a tongue piece forming a convex curve. Since the shape of the heat shield sheet 1 is not limited, as will be described later, when the heat shield sheet 1 is attached to the inside of the hat, the outer peripheral portion of the heat shield sheet 1 can be overlapped so as to reduce the diameter along the inner surface of the hat. It is desirable to have.

Since the size of the heat shield sheet 1 is not limited, it can be formed according to the size of the hat or helmet to be worn, but in the present embodiment, the outer diameter 1R of the maximum portion of the heat shield sheet 1 is about 240 mm. The thickness of 1 ton is about 0.4 mm.

As shown in FIG. 3, the heat shield sheet 1 includes an aluminum foil 3 having a durable coat 2 formed on the front surface 3a, a glass fiber layer 4 attached to the back surface 3b of the aluminum foil 3, and the aluminum foil 3. It is provided with a moisture-permeable waterproof resin layer 5 provided on the back surface 4b of the glass fiber layer 4 located on the opposite side. The durable coat 2 has an effect of preventing the reflectance of the surface 3a of the aluminum foil 3 from being lowered due to aged deterioration or the like. The aluminum foil 3 has heat shielding property, moisture permeability, waterproof property and flexibility.

The heat shield sheet 1 constituting the heat shield 10 is not particularly limited as long as it has flexibility, heat shield, moisture permeability and waterproofness, but for example, the trade name "MW" of Prox Material Co., Ltd. "H. sheet" is suitable. Here, "MWH sheet" is an abbreviation for "Mоisture-Permeability Waterproof Heatshield sheet".

Next, how to use the heat shield 10 will be described with reference to FIGS. 4 and 5.

FIG. 4 shows a state in which a heat shield 10 is attached to a hat 20 called a cap, a baseball cap, or the like and is covered with the head H. As shown in FIG. 4, when the surface 10a (see FIG. 3) of the heat shield 10 is pushed into the inside of the hat 20 (the portion covering the head H) with the posture facing the inner surface 20b of the hat 20, the heat shield sheet 1 Due to its flexibility, it deforms into a state along the concave curved surface shape of the inner surface 20b of the hat 20 and fits into the inside of the hat 20.

The heat shield sheet 1 also has elasticity, and due to its elastic restoring force, it tries to return to the original flat plate shape, and the outer peripheral portion of the heat shield sheet 1 presses the inner surface 20b of the hat 20, so that the heat shield sheet 1 is heat shielded. The tool 10 is held inside the hat 20. Further, since the heat shield sheet 1 has a rotationally symmetric shape, if the heat shield sheet 1 is pushed into the hat 20 with its center 1c oriented toward the top portion of the hat 20, the heat shield 10 is not eccentric and the hat 20 is not eccentric. It can be mounted inside the hat 20 and can be easily aligned with the hat 20.

Although not shown, if the hat 20 has a slip or a size ribbon (a member provided so as to go around the head H when the hat 20 is worn), the outer peripheral portion of the heat shield sheet 1 is covered. If the inner surface 20b of the hat 20 is sandwiched between the slip and the size ribbon, the heat shield 10 can be held more stably.

As shown in FIG. 4, when the head H is covered with the hat 20 equipped with the heat shield 10, the radiant heat emitted from the sun or the like is reflected (blocked) by the heat shield sheet 1 constituting the heat shield 10. Therefore, it is possible to suppress the temperature rise inside the hat 20.

Moisture (water vapor) caused by sweating of the head H penetrates through the heat shield 10 and flows into the gap G between the surface 10a of the heat shield 10 and the inner surface 20b of the hat 20, and the fabric of the hat 20. Since it is radiated to the outside by passing through the inner surface 20b of the hat 20 or passing through the outer edge portion of the inner surface 20b of the hat 20, the increase in humidity inside the hat 20 worn on the head H is suppressed, and a comfortable state with low humidity is maintained. Time can be maintained.

Next, FIG. 5 shows a state in which the heat shield 10 is attached to the helmet 30 and is covered with the head H. When attaching the heat shield 10 to the helmet 30, the headband 31 attached to the inside of the cap body 32 of the helmet 30 is once removed, and a double-sided adhesive tape or the like is attached to the outside (convex portion) of the headband 31. The heat shield 10 is attached using the heat shield 10.

At this time, the heat shield 10 is attached to the headband 31 with the back surface 10b (see FIG. 3) facing the headband 31 and the front surface 10a (see FIG. 3) facing outward. After that, when the headband 31 to which the heat shield 10 is attached is attached to the inside of the cap body 32, the attachment of the heat shield 10 to the helmet 30 is completed.

As shown in FIG. 5, when the helmet 30 equipped with the heat shield 10 is put on the head H, the radiant heat emitted from the sun or the like is reflected (blocked) by the heat shield sheet 1 constituting the heat shield 10. Therefore, it is possible to suppress the temperature rise inside the helmet 30.

Moisture (steam) caused by sweating of the head H penetrates through the heat shield 10 and flows into the gap G between the surface 10a of the heat shield 10 and the inner surface 30b of the helmet 30, and the cap body 32. Since it is radiated to the outside by passing through a ventilation hole (not shown) or through the outer edge portion of the cap body 32, the increase in humidity inside the helmet 30 worn on the head H is suppressed, and the humidity is reduced. Can maintain low comfort for a long time

The usage of the heat shield 10 shown in FIGS. 4 and 5 is an example, and the usage of the heat shield 10 is not limited. Therefore, if the heat shield 10 is worn on a human head such as a hat or a helmet, a cap is used. It can be widely used regardless of the name and type of hat.

Further, the heat shield 10 described with reference to FIGS. 1 to 5 shows an example of the heat shield according to the present invention, and the heat shield according to the present invention is limited to the above-mentioned heat shield 10. Not done.

The heat shield according to the present invention can be widely used as a means for suppressing a temperature rise inside a helmet worn by civil engineering construction workers, factory workers, etc., and a hat worn by ordinary people.

1 Heat shield sheet 1a, 1b Notch 1c Center 1R Outer diameter 2 Durable coat 3 Aluminum foil 3a, 10a Surface 3b, 4b, 10b Back surface 4 Glass fiber layer 5 Moisture permeable waterproof resin layer 20 Hat 20b Inner surface 30 Helmet 31 Headband 32 Cap body G Gap H Head

Claims (3)

A heat shield made of a heat shield sheet that has flexibility that can be deformed into a shape along the inner surface of a hat or helmet, and has heat shield, moisture permeability, and waterproof properties. The heat-shielding sheet has heat-shielding, moisture-permeable and waterproof properties, and has an aluminum foil having a durable coat formed on its surface, a glass fiber layer attached to the back surface of the aluminum foil, and the opposite of the aluminum foil. The heat shield according to claim 1, further comprising a moisture permeable waterproof resin layer provided on the back surface of the glass fiber layer located on the side. The heat shield according to claim 1 or 2, wherein the heat shield sheet has a rotationally symmetric shape in a plan view.

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