JP2021165713A - Deterioration display device - Google Patents

Abstract

To provide a deterioration display device capable of indicating the heat history of a component.SOLUTION: The deterioration display device indicates the degree of deterioration due to the heat of a component. The deterioration display device includes: a heat storage layer formed over the outer peripheral surface of the component, which has the heat storage property, and the life of which at the first temperature is shorter than the endurance time of the part at first temperature; a first insulation layer formed over the upper surface of the heat storage layer, which has the thermal insulation property, and the life of which at the first temperature is the value obtained by subtracting the life of the heat storage layer from the durability time of the part; a temperature indicator layer formed over the upper surface of the first insulation layer and changes the color when the second temperature is exceeded; and a second insulation layer formed over the upper surface of the temperature indicator layer, which has heat resistance.SELECTED DRAWING: Figure 2

Description

The present invention relates to a deterioration display device, and more particularly to a deterioration display device that displays the degree of deterioration due to heat of a component.

Conventionally, as a deterioration display device of this type, a device having a film formed of an irreversible temperature indicating resin and being applied to the outer peripheral surface of a component has been proposed (see, for example, Patent Document 1). In this device, the coating changes to a distinctive color when the component is exposed to a predetermined maximum temperature, and the color is retained even when the temperature due to irreversibility drops. This configuration indicates that the component has been exposed to the highest temperature.

Japanese Unexamined Patent Publication No. 2-81944

However, although the above-mentioned deterioration display device can display that the component has been exposed to the maximum temperature, it cannot display a specific heat history, that is, how many hours it has been subjected to heat to the extent that deterioration progresses. Displaying the thermal history of such parts is recognized as an important issue in determining the degree of deterioration of parts.

The main purpose of the deterioration display device of the present invention is to display the thermal history of parts.

The deterioration display device of the present invention has adopted the following means in order to achieve the above-mentioned main object.

The deterioration display device of the present invention
It is a deterioration display device that displays the degree of deterioration due to heat of parts.
A heat storage layer provided on the outer peripheral surface of the component, having a heat storage property, and having a life at the first temperature shorter than the endurance time at the first temperature of the component.
A first heat insulating layer provided on the upper surface of the heat storage layer, having heat insulating properties, and having a life at the first temperature obtained by subtracting the life of the heat storage layer from the durable time of the component.
A temperature indicating layer provided on the upper surface of the first heat insulating layer and discolored when the second temperature is exceeded,
A second heat insulating layer provided on the upper surface of the temperature indicating layer and having heat insulating properties,
The gist is to prepare.

In the deterioration display device of the present invention, the sum of the life of the heat storage layer at the first temperature and the life of the first heat insulating layer at the first temperature is equal to the durability time of the component at the first temperature. , A heat storage layer and a first heat insulating layer are formed. Here, the "life at the first temperature" is the time during which the effects of heat storage and heat insulation are lost when the integrated value of the time when the temperature reaches the first temperature or higher exceeds this. The "durability time at the first temperature" is the time during which the deterioration of the parts becomes large when the integrated value of the time when the temperature becomes the first temperature or higher exceeds this. Therefore, when the integrated value of the time when the component reaches the first temperature or higher is less than or equal to the durability time, the heat storage layer and the first heat insulating layer do not reach the end of their life, so that the heat storage and heat insulating effects of the heat storage layer and the first heat insulating layer are not reached. As a result, heat is not transferred to the temperature indicating layer, or even if heat is transferred, it is very small, and heat transfer from above to the temperature indicating layer is suppressed by the second heat insulating layer side, so that the temperature indicating layer is formed. Does not discolor. When the integrated value of the time when the component reaches the first temperature or higher exceeds the endurance time, the heat storage layer and the first heat insulating layer reach the end of their life, so that the heat storage and heat insulating effects of the heat storage layer and the first heat insulating layer are lost. It becomes very small and heat is transferred to the temperature indicating layer, causing the temperature indicating layer to discolor. At this time, since the heat transfer from above to the temperature indicating layer is suppressed by the second heat insulating layer, the integrated value of the time when the component becomes the first temperature or higher due to the discoloration of the temperature indicating layer exceeds the durability time. Can be displayed. As a result, the thermal history of the component can be displayed. Here, "having a heat storage property" means having a relatively high heat storage property, for example, a heat ^{storage material having a heat capacity of 20 J / (cm 3} · K) or more. "Having a heat insulating property" means having a relatively high heat insulating property, for example, a heat insulating material having a thermal conductivity of 0.1 W / (m · K) or less. The first temperature and the second temperature may be the same temperature or different temperatures.

The first deterioration progress display device of the present invention is
The deterioration display device of the present invention of the above-described embodiment, that is, basically,
It is a deterioration display device that displays deterioration due to heat of parts.
A heat storage layer provided on the outer peripheral surface of the component, having a heat storage property, and having a life at the first temperature shorter than the endurance time at the first temperature of the component.
A first heat insulating layer provided on the upper surface of the heat storage layer, having heat insulating properties, and having a life at the first temperature obtained by subtracting the life of the heat storage layer from the durable time of the component.
A temperature indicating layer provided on the upper surface of the first heat insulating layer and discolored when the second temperature is exceeded,
A second heat insulating layer provided on the upper surface of the temperature indicating layer and having heat insulating properties,
Equipped with multiple deterioration display devices
The gist of the plurality of deterioration display devices is that the sum of the life of the heat storage layer and the life of the first heat insulating layer is different from each other.

The first deterioration progress display device of the present invention includes a plurality of the deterioration display devices of the present invention described above, and the sum of the life of the heat storage layer and the life of the first heat insulating layer is different from each other. Therefore, each time the integrated value of the time when the component reaches the first temperature or higher exceeds the sum of the life of the heat storage layer of each deterioration display device and the life of the first heat insulation layer, the corresponding temperature indicator layer of the deterioration display device is discolored. do. Thereby, the degree of progress of deterioration of the parts can be displayed.

In the first deterioration progress display device of the present invention, the temperature indicating layers of the plurality of deterioration display devices may be discolored to different colors when the second temperature is exceeded. In this way, the degree of deterioration of the parts can be displayed with good visibility.

The second deterioration progress display device of the present invention is
The deterioration display device of the present invention of the above-described embodiment, that is, basically,
It is a deterioration display device that displays deterioration due to heat of parts.
A heat storage layer provided on the outer peripheral surface of the component, having a heat storage property, and having a life at the first temperature shorter than the endurance time at the first temperature of the component.
A first heat insulating layer provided on the upper surface of the heat storage layer, having heat insulating properties, and having a life at the first temperature obtained by subtracting the life of the heat storage layer from the durable time of the component.
A temperature indicating layer provided on the upper surface of the first heat insulating layer and discolored when the second temperature is exceeded,
A second heat insulating layer provided on the upper surface of the temperature indicating layer and having heat insulating properties,
Equipped with multiple deterioration display devices
The gist is that the plurality of deterioration display devices are processed so as to form at least one character shape that can be recognized by a human.

In the second deterioration progress display device of the present invention, when the integrated value of the time when the component reaches the first temperature or higher exceeds the endurance time, the heat storage layer and the first heat insulating layer of each deterioration display device reach the end of their life. , Characters are displayed. Thereby, the degree of progress of deterioration of the parts can be displayed.

It is a block diagram which shows the outline of the structure of the V ribbed belt 10 to which the temperature indicating label 20 as an Example of this invention is attached. It is explanatory drawing for demonstrating the structure of the temperature indicating label 20. It is a plane schematic diagram which shows the outline of the plane which looked at three kinds of temperature indicating labels 120a, 120b, 120c from the upper side of FIG. It is explanatory drawing which shows an example of the appearance in which a plurality of temperature indicating labels 20 are attached to the V ribbed belt 10 in a character shape.

Next, a mode for carrying out the present invention will be described with reference to examples.

FIG. 1 is a configuration diagram showing an outline of the configuration of a V-ribbed belt 10 to which a temperature indicating label 20 is affixed as an embodiment of the present invention. The V-ribbed belt 10 is configured as a transmission belt for transmitting power to auxiliary machinery of an engine mounted on a vehicle via pulleys P1 to P6, and is made of black rubber. The V-ribbed belt 10 is bent at a plurality of places due to the arrangement of the pulleys P1 to P6, and when driven, heat is generated at the bent places to raise the temperature and the deterioration progresses. In the embodiment, in the V-ribbed belt 10, the integrated value of the time when the surface temperature becomes the temperature T1 (for example, 80, 90, 100 ° C.) or more on average is the endurance time tref (for example, 2000 hours, 3000 hours, 4000 hours, etc.). ) Is exceeded, it shall be significantly deteriorated. Two temperature indicating labels 20 are attached to the outer peripheral surface of the V-ribbed belt 10 at two places.

FIG. 2 is an explanatory diagram for explaining the configuration of the temperature indicating label 20. As shown in FIG. 1, the temperature indicating label 20 is formed in a substantially rectangular shape when viewed from above in FIG. 2, and includes a sticking layer Lp, a heat storage layer Lts, a heat insulating layer Li1, a temperature indicating layer Lti, and a heat insulating layer. It includes Li2. In the temperature indicating label 20, each layer is formed so that the color (black) of the V-ribbed belt 10 can be visually recognized by the user before receiving heat from the V-ribbed belt 10.

The sticking layer Lp has a thickness of 1 mm or less due to a material that can be adhered to the surface of the V-ribbed belt 10 (for example, an acrylic-based or butyl-based adhesive-coated non-woven fabric used in "Eptsealer" manufactured by Nitto Denko Co., Ltd.). It is formed on the surface.

The heat storage layer Lts is formed on the upper surface of the sticking layer Lp in FIG. 2 by a material having a heat storage property (for example, “heat storage sheet” manufactured by DIC Corporation). The heat storage layer Lts is formed to have a thickness (for example, 1 mm or the like) such that the life at the temperature T1 becomes t1 for a time shorter than the endurance time tref. The "life at temperature T1" in the heat storage layer Lts is the time during which the effect of heat storage disappears when the integrated value of the time when the temperature becomes T1 or higher exceeds this. In the embodiment, "having a heat storage property" means having a relatively high heat storage property, for example, a heat ^{storage material having a heat capacity of 20 J / (cm 3} · K) or more.

The heat insulating layer Li1 is formed on the upper surface of the heat storage layer Lts in FIG. 2 by a polypropylene-based material having heat insulating properties (for example, "Vaper VIP" manufactured by Kurabo Industries Ltd.). The heat insulating layer Li1 is formed to have a thickness (for example, 1 mm or the like) such that the life at the temperature T1 is the time t2 (= tref-t1) obtained by subtracting the time t1 from the endurance time tref. The "life at temperature T1" in the heat insulating layer Li1 is the time during which the heat insulating effect disappears when the integrated value of the time when the temperature becomes T1 or higher exceeds this. In the embodiment, "having heat insulating property" means having relatively high heat insulating property, for example, a heat insulating material having a thermal conductivity of 0.1 W / (m · K) or less.

The temperature indicating layer Lti is colorless and transparent at a temperature of T2 or less, and is irreversibly colored when the temperature exceeds T2 (for example, "Thermolabel (registered trademark)" manufactured by NiGK Thermo Label Co., Ltd.). It is formed on the upper surface of the above. The temperature T2 can be appropriately determined, but is preferably lower than the temperature T1, for example, 70 ° C., 80 ° C., 90 ° C., and the like. When the temperature T2 is exceeded, the temperature indicating layer Lti preferably develops a color (for example, yellow, light blue, pink, etc.) that is easily distinguishable from the color (black) of the V-ribbed belt 10.

The heat insulating layer Li2 is formed on the upper surface of the temperature indicating layer Lti in FIG. 2 by a polypropylene-based material having a second heat insulating property (for example, "Vaper VIP" manufactured by Kurabo Industries Ltd.). The heat insulating layer Li2 is formed to have a thickness (for example, 1 mm or the like) that can ensure transparency to the extent that the color development of the temperature indicating layer Lti can be confirmed. Since the heat insulating layer Li2 has a heat insulating property, it prevents the ambient heat from being transferred to the temperature indicating layer Lti and causing the temperature indicating layer Lti to develop color.

In the temperature indicating label 20 configured in this way, the sum of the life of the heat storage layer Lts at the temperature T1 and the life of the heat insulating layer Li1 at the temperature T1 is equal to the durability time tref of the V-ribbed belt 10 at the temperature T1. The heat storage layer Lts and the heat insulating layer Li1 are formed. Therefore, when the integrated value of the time when the surface of the V-ribbed belt 10 reaches the temperature T1 is equal to or less than the endurance time tref, at least one of the heat storage layer Lts and the heat insulating layer Li1 has not reached the end of its life. Due to the effect of heat storage and heat insulation of the heat insulating layer Li1, the heat is not transferred to the temperature indicating layer Lti, or even if the heat is transferred, it becomes very small. Therefore, the temperature of the temperature indicating layer Lti is maintained below the temperature T2, and the temperature indicating layer Lti does not develop color and is maintained in a transparent state.

When the integrated value of the time when the surface of the V-ribbed belt 10 becomes the temperature T1 or higher exceeds the endurance time tref, both the heat storage layer Lts and the heat insulating layer Li1 reach the end of their life. The heat insulation effect is lost or becomes very small, and heat is transferred to the temperature indicating layer Lti. Therefore, the temperature of the temperature indicating layer Lti exceeds the temperature T2, and the temperature indicating layer Lti develops color. The color development of the temperature indicating layer Lti is also visible through the heat insulating layer Li2. Therefore, due to the color development of the temperature indicating layer Lti, the integrated value of the time when the surface of the V-ribbed belt 10 becomes the temperature T1 or higher exceeds the endurance time tref, that is, the thermal history of the V-ribbed belt 10 can be displayed. The user can be prompted to replace the V-ribbed belt 10.

In the V-ribbed belt 10 to which the temperature indicating label 20 of the above-described embodiment is affixed, the sum of the life of the heat storage layer Lts at the temperature T1 and the life of the heat insulating layer Li1 at the temperature T1 is the durability time tref of the V-ribbed belt 10. By forming the heat storage layer Lts and the heat insulating layer Li1 so as to be equal to, the heat history of the V-ribbed belt 10 can be displayed.

In the embodiment, one type of temperature indicating label 20 is attached to the V-ribbed belt 10. However, two or more types of temperature indicating labels 20 may be attached. FIG. 3 is a schematic plan view showing an outline of a plane in which three types of temperature indicating labels 120a, 120b, and 120c are viewed from the upper side of FIG. The temperature indicating labels 120a, 120b, and 120c each include a heat storage layer Lts and a heat insulating layer Li1 having different lifespans, and a temperature indicating layer Lti having different colors when they are colored.

In the temperature indicating label 120a, the sum of the life of the heat storage layer Lts and the heat insulating layer Li1 at the temperature T1 of the heat storage layer Lts and the life of the heat insulating layer Li1 at the temperature T1 is time ta (for example, 800 hours, 1000 hours, It is formed so as to be (1200 hours, etc.). The temperature indicating layer Lti is formed so as to change its color from transparent to light blue when the temperature exceeds T2.

In the temperature indicating label 120b, the sum of the life of the heat storage layer Lts and the heat insulating layer Li1 at the temperature T1 of the heat storage layer Lts and the life of the heat insulating layer Li1 at the temperature T1 is longer than the time ta (for example, 1800 hours). , 2000 hours, 2200 hours, etc.). The temperature indicating layer Lti is formed so as to change its color from transparent to yellow when the temperature exceeds T2.

In the temperature indicating label 120c, the sum of the life of the heat storage layer Lts and the heat insulating layer Li1 at the temperature T1 of the heat storage layer Lts and the life of the heat insulating layer Li1 at the temperature T1 is longer than the time ta (for example, 2800 hours). It is formed so as to be 3000 hours, 3200 hours, etc.). The temperature indicating layer Lti is formed so as to change its color from transparent to pink when the temperature exceeds T2.

With such a configuration, when the integrated value of the time when the outer peripheral surface of the V-ribbed belt 10 becomes the temperature T1 or higher exceeds the time ta, the temperature indicating layer Lti of the temperature indicating label 120a develops a light blue color, and the outer peripheral surface of the V-ribbed belt 10 becomes the temperature T1. When the integrated value of the above time exceeds the time tb, the temperature indicating layer Lti of the temperature indicating label 120b develops a yellow color, and the integrated value of the time when the outer peripheral surface of the V-ribbed belt 10 becomes the temperature T1 or more exceeds the time tk. Then, the temperature indicating layer Lti of the temperature indicating label 120c develops a pink color. By such a change in color, the user can be made aware of the degree of deterioration of the V-ribbed belt 10.

In the embodiment, the temperature indicating label 20 is formed in a substantially rectangular shape. However, a plurality of temperature indicating labels 220 may be processed and attached to the outer peripheral surface of the V-ribbed belt 10 so as to form a human-recognizable character shape. FIG. 4 is an explanatory view showing an example of a state in which a plurality of temperature indicating labels 220 are attached to the V-ribbed belt 10 in a character shape. FIG. 4 shows a state when the integrated value of the time when the outer peripheral surface of the V-ribbed belt 10 becomes the temperature T1 or higher exceeds the endurance time tref. In this way, when the integrated value of the time when the outer peripheral surface of the V-ribbed belt 10 becomes the temperature T1 or higher exceeds the endurance time tref, the temperature indicating layer Lti of each temperature indicating label 220 develops a color and the characters "replacement time" are displayed. NS. With such a display, the user can be made to recognize that the endurance time tref of the V-ribbed belt 10 has elapsed and the replacement time has come. In this case, the displayed characters are not limited to the "exchange time", and may be at least one character, and may be a pictogram.

In the embodiment, two temperature indicating labels 20 are attached to the outer peripheral surface of the V-ribbed belt 10. However, the number of temperature indicating labels 20 to be attached to the V-ribbed belt 10 may be one or more, and for example, three temperature indicating labels 20 may be attached. Further, the temperature indicating label 20 may be attached to the entire outer peripheral surface of the V-ribbed belt 10.

In the embodiment, the temperature indicating label 20 is attached to the outer peripheral surface of the V-ribbed belt 10. However, the sticking position of the temperature indicating label 20 is not limited to the outer peripheral surface of the V-ribbed belt 10, and may be stuck at any position as long as it can be visually recognized by the user.

In the embodiment, the heat insulating layers Li1 and Li2 are formed of the same material, but may be formed of materials having different heat insulating properties.

In the embodiment, the temperature indicating label 20 is attached to the V-ribbed belt 10. However, the target to which the temperature indicating label 20 is affixed is not limited to the V-ribbed belt 10, but any part such as a hose pipe made of resin or rubber that deteriorates due to a temperature rise due to heat. It doesn't matter.

The correspondence between the main elements of the examples and the main elements of the invention described in the column of means for solving the problem will be described. In the embodiment, the heat storage layer Lts corresponds to the "heat storage layer", the heat insulating layer Li1 corresponds to the "first heat insulating layer", the temperature indicating layer Lti corresponds to the "temperature indicating layer", and the heat insulating layer Li2 corresponds to the "second heat insulating layer". Corresponds to "layer".

Regarding the correspondence between the main elements of the examples and the main elements of the invention described in the column of means for solving the problem, the invention described in the column of means for solving the problem in the examples is carried out. Since it is an example for specifically explaining the form for solving the problem, the elements of the invention described in the column of means for solving the problem are not limited. That is, the interpretation of the invention described in the column of means for solving the problem should be performed based on the description in the column, and the examples are the inventions described in the column of means for solving the problem. It is just a concrete example.

Although the embodiments for carrying out the present invention have been described above with reference to examples, the present invention is not limited to these examples, and various embodiments are used without departing from the gist of the present invention. Of course, it can be done.

The present invention can be used in the manufacturing industry of deterioration display devices and the like.

10 V ribbed belt, 20, 120a, 120b, 120c, 220 temperature indicating label, Li1, Li2 heat insulating layer, Lp pasting layer, Lts heat storage layer, Lti temperature indicating layer, P1 to P6 pulley.

Claims (1)

It is a deterioration display device that displays the degree of deterioration due to heat of parts.
A heat storage layer provided on the outer peripheral surface of the component, having a heat storage property, and having a life at the first temperature shorter than the endurance time at the first temperature of the component.
A first heat insulating layer provided on the upper surface of the heat storage layer, having heat insulating properties, and having a life at the first temperature obtained by subtracting the life of the heat storage layer from the durable time of the component.
A temperature indicating layer provided on the upper surface of the first heat insulating layer and discolored when the second temperature is exceeded,
A second heat insulating layer provided on the upper surface of the temperature indicating layer and having heat insulating properties,
Deterioration display device including.

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