JPH0192406A - Heat insulating clothing - Google Patents

Abstract

PURPOSE: To obtain warmth retaining clothes capable of making the gap distance between two fabrics variable and changing the warmth retaining properties of the clothes according to a change in environmental temperature by arranging a shape memorizing alloy member in the intermediate part of the two fabrics, causing a three-dimensional dimensional change under prescribed temperature conditions and deforming the shape memorizing alloy member. CONSTITUTION: The warmth retaining clothes are obtained by arranging a shape memorizing alloy member 2 capable of forming a conical spiral shape having 5cm height at <=8 deg.C in any of the shoulder, breast and back parts of the clothes containing a wadding 5 arranged in the intermediate between, e.g. a face cloth 3 and a lining cloth 4. The shape memorizing alloy member 2 acts to form a solid body when the environmental temperature attains a prescribed temperature or below. Thereby, the interval between the face and lining clothes 3 and 4 is extended to increase the thickness and raise the air content and warmth retaining properties are imparted thereto.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a thermal garment having a novel structure.

(Prior Art) Conventionally, heat-retaining clothing has been generally used in which a nonwoven fabric, fiber web, feather, or the like of an appropriate thickness is sandwiched between an outer material and a lining material in a sandwich-like manner. This utilizes the heat insulating effect of having many air layers between two pieces of cloth, and the thickness of the air layer is expected to be approximately proportional to the heat retention. However, no matter what thickness the clothing is set to, its heat retention properties remain fixed under certain temperature conditions, and the heat retention properties of the clothing itself do not change in response to changes in the temperature of the wearing environment. It is common for the temperature of the environment in which clothes are worn to change by 5 to 10 degrees Celsius or more over time, even within a day. On the other hand, even if the temperature of the wearing environment is approximately constant, it is normal for the amount of exercise of the employee to change. In response to changes in the heat production m of the human body due to changes in environmental temperature and changes in the amount of exercise, the necessary heat retention required of clothing in order to keep the inside of the clothing comfortable changes. However, it is not possible to change the heat retention properties of a single piece of conventional clothing. Originally, the human body has a physiological function that automatically adjusts the amount of heat dissipated and produced when there is a slight change in the environmental temperature, but because the range of this is limited, it In response to changes, we adjust and compensate by putting on and taking off layers of clothing, opening and closing zippers and buttons, turning up collars, and putting on hoods.

(Objective of the Invention) The object of the present invention is to improve the drawback that the fixed heat retention properties of conventional clothes are difficult to deal with the environmental temperature that changes significantly. The purpose of the present invention is to propose a thermal garment having a novel structure that avoids changes in the thermal insulation properties of the garment in response to changes in the temperature.

(Structure of the Invention) A garment formed by overlapping at least two pieces of fabric, in which a shape memory alloy member is arranged in the middle part of the two pieces of fabric, and the shape memory alloy member is heated to a predetermined temperature or lower. The heat-retaining garment is characterized by having a structure in which the gap distance between the two pieces of fabric in the insertion portion of the shape memory alloy member can be varied by causing a three-dimensional dimensional change and deformation depending on temperature conditions.

The fabric used in the garment of the present invention is formed into a structure in which two or more fabrics are used and overlapped.

The fabrics used here are woven or knitted fabrics or non-woven fabrics that form the outer fabric and lining fabric, and are also woven or knitted fabrics, non-woven fabrics, or non-woven fabrics that are used as a type of heat insulating material or heat insulating material between the outer fabric and the lining fabric. Fiber web (a type of non-woven fabric used as batting)
etc. The types of fibers constituting these fabrics are not particularly limited, and known fibers can be used.

In the present invention, it is important to place a member made of a shape memory alloy in the middle of the two fabrics.

The shape memory alloy member does not change its shape when the environmental temperature is higher than a certain predetermined temperature (set temperature), but changes its shape at a temperature below the predetermined temperature, and the shape change is three-dimensional. This results in a significant dimensional change. In order to produce such three-dimensional dimensional changes, the shape memory alloy members are made in the shapes shown in Figures 1 to 3, and are designed to change shape as shown by the arrows due to temperature changes. Illustrated.

(Figs. 1 to 3 are perspective views showing examples of shapes of shape memory alloy members used in the present invention) In the drawings, 1 indicates a wire made of a shape memory alloy, and in the example of Fig. 1, When the temperature exceeds a predetermined temperature, the spiral shape is formed on a plane as shown in Fig. 1, but when the temperature falls below a predetermined temperature, the thickness changes in the direction perpendicular to the plane. (○
) and changes three-dimensionally.
In the example in Fig. 2, the wire shown in 1 in Fig. 2 (a) is
As shown in the figure (○), the shape changes three-dimensionally by changing into a wavy shape.Furthermore, in another example shown in FIG. changes into a coiled shape,
It changes shape in three dimensions. However, the shape memory alloy member that can be used in the present invention is not limited to the above examples. Known shape memory alloys that change shape can be used, such as CU, Zn, A1 alloy, and N
Although Ti alloys can be used, Qu-based alloys are preferred from the viewpoint of three-dimensional shape change.

The transformation temperature (predetermined temperature in the present invention) of these shape memory alloys is determined depending on the use of thermal clothing, but since it is within the living environment temperature range, it is generally between -40°C and A temperature range of +40°C is used.

In addition, these shape memory alloy members can be placed on any part of the garment as long as it is formed by overlapping two pieces of fabric, but in particular, any one of the n-part, chest, and back part can be used. It is preferable to arrange it in a position that includes.

The present invention provides a structure in which the gap distance between the two fabrics is made variable by deforming such a shape memory alloy member. Further, by adhering or attaching the shape memory alloy member to any one of the outer fabric, lining fabric, and batting, the other fabrics can easily move in a preferable direction against deformation. Preferred examples include those that

Furthermore, in order to freely change the gap distance between the two pieces of fabric, the shape memory alloy member can be housed in a bag to smoothly change the gap distance.

(Action of the Invention) The garment of the present invention is a novel garment whose heat retention properties change according to changes in environmental temperature. The present invention provides an intermediate portion between two pieces of fabric.
That is, by inserting a shape memory alloy member between the outer material, the lining material, and/or the batting material, which memorizes its shape by changing its dimensions three-dimensionally at a predetermined temperature or lower, the environmental temperature can be adjusted accordingly. When the temperature falls below a predetermined temperature, the shape memory alloy member forms a three-dimensional shape, widening the gap between the outer fabric and the lining, increasing the thickness of the garment, making it a garment with a high air content, and improving heat retention.

The thermal conductivity of air is approximately 1/10 that of common clothing materials.
Incorporating as much air as possible into clothing is an important method to effectively obtain thermal clothing.
The amount of heat dissipated through cloth is inversely proportional to the thickness of the cloth, as shown in the following equation, so the thicker the garment, the more air it can take in, making it lighter and better at retaining heat.

Q=λ・A・θ(T1-T2)/b where Q is the heat radiation amount, λ is the thermal conductivity, A is the heat radiation area, (l
L[n, (TI-T2> c temperature 1fffi, b
However, clothing with high heat retention is comfortable when the environmental temperature is within the range commensurate with its heat retention, but when the environmental temperature rises, because the heat retention is fixed, As can be seen from the above equation, the amount of heat dissipated decreases, and the balance (heat balance) between the amount of heat produced by the human body and the heat dissipated through clothing, m, is disrupted, leading to suffocation and excessive heat in the clothes. Conversely, when the environmental temperature decreases, the amount of heat dissipated from clothing increases, and the temperature inside the clothing decreases, making it too cold.

In the clothes of the present invention, when the environmental temperature rises (falls), the thickness of the clothes decreases (increases) due to the shape change of the shape memory alloy, and therefore the amount of heat dissipated through the clothes increases (decreases), so that the heat balance is balanced. This is a new type of thermal clothing that can adapt to environmental changes.

FIG. 4 is a sectional view showing an example of a cross section in which the shape memory alloy member of the garment of the present invention is arranged, and shows that the shape memory alloy member 2 is arranged in the intermediate part between the outer fabric 3 and the lining fabric 4. ing.

Reference numeral 5 denotes a batting placed between the outer fabric 3 and the inner fabric 4.

FIG. 5 is a cross-sectional view showing a change in shape of the cross-sectional portion of the garment of the present invention shown in FIG. 4, in which the gap distance between the outer fabric 3 and the inner fabric 4 is widened due to the change in shape of the shape memory alloy member 2.

In particular, when the shape memory alloy member is placed on the shoulders, chest, or back, the effects and effects of the present invention are remarkable.

This is because, in these parts, the weight of the fabric constituting the clothing tends to cause the fabric to come into close contact with the body, and the gap distance @ (thickness) of the fabric can be easily adjusted using the shape memory alloy member.

(Example) Using a wire rod (wire diameter/mφ) of a shape memory alloy of Cu-Zn-Al1 alloy that deforms at a temperature of 20°C or less, a diameter of 10cm1ll as shown in Fig. 1 is used. One roll was made, and the shape memory alloy member formed a conical spiral shape with a height of 5 cm at a temperature of 8° C. or lower.

This shape memory alloy member was sewn only to the bag side of the left chest area in the middle of a jacket consisting of two layers, an outer material and a lining material. When the jacket was worn in an environment at a temperature of 20° C., there was almost no difference in appearance between the left and right sides, and almost no color difference between the left and right sides was observed even in thermography using infrared rays. Next, when I entered the artificial climate room where the temperature was adjusted to 10℃, only the left chest area was about 30℃.
When I looked at the same thermography, the right breast looked red, while the left breast looked precious, and it was confirmed that the surface temperature of the clothes was clearly different, and the amount of heat dissipated from the left breast was smaller.

[Brief explanation of the drawing]

1 to 3 are perspective views showing examples of shapes of shape memory alloys used in the present invention. FIG. 4 is a cross-sectional view showing a portion of the garment of the present invention in which the shape memory alloy member is arranged, and FIG. 5 is a cross-sectional view showing changes in shape of the cross-sectional portion of the garment of the present invention shown in FIG. 2... Shape memory alloy member patent applicant Teijin Ltd. No. 1
Figure (a) (b) Figure 2 (a) (b) Figure 3;!

Claims (1)

[Scope of Claims] 1. A garment formed by overlapping at least two pieces of fabric, in which a shape memory alloy member is placed in the middle of the two pieces of fabric, and the shape memory alloy member has a predetermined shape. A thermal garment characterized by having a structure in which the gap distance between the two or more fabrics of the shape memory alloy member insertion portion is made variable by causing three-dimensional dimensional changes and deformation under temperature conditions below that temperature. 2. The garment according to claim 1, wherein the shape memory alloy member is disposed at one of the shoulders, chest, and back.