JPH0614438U - Radiator cap - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a radiator cap that is safe to touch and can be seen at a glance. [Structure] The first invention is the upper surface 1 of the portion 10 to be touched by hand.
1 is a radiator cap for an automobile, in which at least a part of No. 1 is reversibly discolored at a certain temperature or more, and a temperature-indicating paint 20 indicating that it is dangerous is applied. In the second invention, the portion 10 to be touched by hand is provided with a heat-defective conductor layer 3 such as rubber
It is a radiator cap for an automobile, which is covered with 0, and at least a part of the heat-defective conductor layer 30 is reversibly discolored when the temperature exceeds a certain temperature and is colored with a temperature indicating pigment 40 indicating that it is dangerous.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a radiator cap that is safe to touch and that is dangerous.

[0002]

[Prior art]

 A description will be given with reference to FIGS. Reference numeral 11 is the upper surface of the cap, and 10 is the portion to be touched by hand. Conventionally, the radiator cap is made of metal, and the cautions indicate that it is dangerous and should not be opened when it is hot, but the pressure type cap is heated by the heat medium, and even if it is hot, it will be hot until touched. I don't know if Also, if you wear gloves, you can touch it even at high temperatures, but if the internal heat medium is overheated and pressurized, you can inadvertently remove the pressure-type cap and vapor or liquid will be released. Eruption may occur and it is very dangerous.

[0003]

[Problems to be solved by the device]

 The problem to be solved is that the above-mentioned conventional radiator cap has a precautionary statement for danger prevention, but the state of whether it is dangerous or not cannot be known unless it is touched or the pressure type cap is removed. .

[0004]

[Means for Solving the Problems]

 Description will be made with reference to FIGS. 1 to 3 to 10. A first invention is a radiator for an automobile, in which at least a part of an upper surface 11 of a portion 10 to be touched by hand is reversibly discolored at a certain temperature or higher, and a temperature-indicating paint 20 indicating that it is dangerous is applied. It is a cap.

In the second invention, the part 10 to be touched with hands is covered with a heat-defective conductor layer 30 such as rubber, and at least a part of the heat-defective conductor layer 30 reversibly discolors at a certain temperature or higher, which is dangerous. This is a radiator cap for an automobile, which is colored with a temperature indicating pigment 40 indicating that

[0006]

【Example】

 An embodiment will be described with reference to FIGS. 1 and 3 to 10. First, in the radiator cap of the automobile of the first idea, at least a part of the upper surface 11 of the portion 10 to be touched by hand is heated to a certain temperature or more. In this case, the temperature-indicating paint 20 which reversibly discolors and indicates that it is dangerous is applied. As the temperature-indicating paint 20, for example, Thermo Paint R-5 (NOF Giken Kogyo Co., Ltd.), which changes its color at 50 degrees or more, is used, but when the internal heat medium is overheated and the pressure cap is removed. In order to indicate that there is a risk of bumping and jetting of steam or liquid, it is also possible to use one that discolors at 100 degrees or more, for example.

Next, in the second invention, the part 10 to be touched with a hand is covered with a heat-defective conductor layer 30 such as rubber, and at least a part of the heat-defective conductor layer 30 reversibly discolors at a certain temperature or higher. It is colored with a thermochromic pigment 40 indicating that it is dangerous. As the heat-defective conductor layer 30, a light-colored compound rubber (silicone, EPDM, acrylic rubber, heat-resistant NBR, etc.) with heat resistance of about 120 degrees is used, and it is baked or adhered, or adhered with a heat-resistant adhesive or the like. Although it is preferable that the cover 35 is separately molded as shown in the drawing, the cover 35 may be put on the existing pressure cap. As the temperature-indicating pigment 40, one having a temperature of less than 100 degrees (boiling temperature of water), preferably around 70 degrees (temperature that can be touched with bare hands), such as Daithermo PR70 or Daithermo DR70 (both are Dainichi Seika Co., Ltd.) use.

The operation will be described. First, in the first invention, there is no indication on the upper surface 11 below the discoloration temperature (50 ° C.) of the temperature indicating paint 20, but when the discoloring temperature is reached, the temperature indicating coating 20 is applied. Discoloration occurs, for example, the display "Don't open, danger, DANGER" appears. Also, as shown in the figure, when using two kinds of temperature-indicating paints so that the color changes at two stages of temperature (50 degrees and 100 degrees), first, at 50 degrees, "hot, dangerous, danger", At 100 degrees, you may want to make it appear as "hot, open, dangerous, danger".

As shown in the drawing, the second invention is that the heat-defective conductor layer 30 or the entire surface of the cover 31 has the same color below the discoloration temperature, and when the discoloration temperature is reached, the thermochromic pigment 40 in the character part discolors, There are two embodiments in which the ground portion is not discolored or the non-character portion of the temperature indicating pigment 40 is discolored so that the character portion remains as it is.

[0010]

[Effect of device]

 Since the present invention is configured as described above, it is obvious that the temperature-indicating paint 20 or the temperature-indicating pigment 40 discolors when the temperature exceeds a predetermined discoloration temperature, the radiator cap is hot, and it is dangerous to touch and remove it. Therefore, it is possible to prevent the risk of burns and the like. In the second invention, the upper surface 11 of the radiator cap can be touched with a sense of security up to 70 degrees.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a radiator cap.

FIG. 2 is a perspective view showing a conventional example.

FIG. 3 is a plan view showing a state in a safe temperature range of the embodiment of the first invention.

FIG. 4 is a plan view showing a state in a dangerous temperature range when touched with a hand according to the first embodiment of the first invention.

FIG. 5 is a plan view showing a second embodiment of the first invention in a dangerous temperature range when touched with a hand, and in a state below a bumping temperature.

FIG. 6 is a plan view showing a state of the second embodiment of the first invention above the bumping temperature.

FIG. 7 is a plan view showing a state in a safe temperature range showing an embodiment of the second invention.

FIG. 8 is a plan view showing a state in a dangerous temperature range when touched with a hand according to the first embodiment of the second invention.

FIG. 9 is a plan view showing a state in a dangerous temperature range when touched with a hand according to the second embodiment of the second invention.

FIG. 10 is a perspective view showing a third embodiment of the second invention.

[Explanation of symbols]

 10 Part to be touched with hands 11 Upper surface 20 Thermochromic paint 30 Heat-poor conductor layer 31 Cover 40 Thermochromic pigment

Claims (2)

[Scope of utility model registration request] 1. An upper surface (11) of a portion (10) to be touched by hand.
A radiator cap for an automobile, which is coated with a temperature-indicating paint (20) that reversibly discolors at least a part of the temperature above a certain temperature and indicates that it is dangerous. 2. A portion (10) to be touched by hand is covered with a heat-defective conductor layer (30) such as rubber, and at least a part of the heat-defective conductor layer (30) is reversibly discolored when the temperature exceeds a certain level. , A radiator cap of an automobile colored with a thermochromic pigment (40) indicating that it is dangerous.