JPH0257045B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a long-lasting insecticidal tool using a vaporizable insecticidal component, particularly to an insecticidal tool for mosquito repellent.

(Prior technology) In recent years, electronic mosquito repellents using vaporizable insecticidal ingredients such as d-T80-allethrin (pyrethroid) have been increasingly used in place of mosquito coils, which have been widely used since ancient times as a long-lasting mosquito repellent. It's summery.

This electronic mosquito repellent generally has a mat made of base paper or non-woven fabric impregnated with a volatile insecticidal ingredient placed on a resistance heating element, and the insecticidal ingredient is vaporized by heating the mat to about 80°C. . Furthermore, in recent years, a structure in which the liquid component of the insecticidal component itself is heated and vaporized has been put into practical use.

However, such an electronic mosquito repellent cannot be used outdoors without a power source, and cannot be used for camping in the mountains or at the seaside. On the other hand, when using conventional mosquito coils outdoors, there are problems in that it is difficult to ignite due to wind and the like, and there is a high risk of fire.

As a solution to the above problems, as described in, for example, Japanese Unexamined Patent Publication No. 61-63602, Japanese Utility Model Application No. 58-87801, etc., it is possible to generate heat from the exothermic agent generally used in disposable hand warmers. There are insecticide tools that vaporize the insecticidal ingredients of insecticides.

(Problems to be Solved by the Invention) The above insecticide generates heat through air oxidation of the exothermic agent, so it has the advantage that it can be used outdoors without power and there is no risk of fire. There is a problem in that it is not possible to determine from the appearance whether or not the fever state of the insecticide is occurring, that is, whether or not the insecticidal effect of the insecticide is occurring, and in particular, it is not possible to confirm the remaining amount of the insecticidal effect, so it is difficult to use the insecticidal tool reliably. There is a risk of replacing the insecticide before it is used up, or conversely, leaving the insecticide without knowing that it has lost its insecticidal effect. The drawback was that it was impossible to know exactly.

This invention was made in view of the above-mentioned circumstances, and an object of the present invention is to provide an insecticidal tool that can reliably detect the remaining amount of the insecticidal effect of an insecticide.

(Means for Solving the Problems) In order to achieve the above object, the insecticidal tool according to the present invention has a heat generating device that generates heat by air oxidation in a bottomed cylindrical container 11 having a ventilation hole 12 formed on the top surface. At least a part of the container 11 or the contents of the container 11 is impregnated with an insecticidal component A that vaporizes due to the heat generated by the exothermic agent 2, and a tape-shaped heat-sensitive discoloration is provided on the outer surface of the container 11. A configuration in which sheets 13 are adhered vertically is adopted.

(Function) According to the present invention, a tape-shaped thermosensitive color-changing sheet 1 is attached to the outer surface of the bottomed cylindrical container 11 containing the exothermic agent 2.
3 is attached vertically, the heat-sensitive discoloration sheet 13 gradually changes color from the top as the exothermic state of the exothermic agent 2 progresses from the top to the bottom. Therefore, the remaining amount of the insecticidal effect of the insecticide A impregnated into the container 11 or the contents of the container 11 can be clearly detected based on the position of the discoloration.

(Embodiment) FIGS. 1 and 2 show a container-shaped insecticide tool 10b to which the present invention is applied. In the figure, reference numeral 11 denotes a bottomed cylindrical paper container in which the exothermic agent 2 is accommodated to the extent that there is a space at the top. A tape-shaped thermosensitive color-changing sheet 13 is pasted vertically,
The upper part of the paper container 11 is impregnated with the volatile insecticidal component A.

As the exothermic agent, components generally used in disposable hand warmers, such as those consisting mainly of iron powder and containing small amounts of auxiliary agents such as water, wood powder, and activated carbon, can be used as is. Further, the exothermic temperature can be adjusted by the composition of the exothermic agent, the air permeability of the container, and the degree of shaking, but it is preferably set at about 70-100°C.

Volatile insecticides can be used without any restrictions as long as they evaporate under the above exothermic temperature, but in particular, d-T80-allethrin (pyrethroid), which is conventionally used in electronic mosquito traps, can be used. Agents are preferred.

Further, the duration of the heat generation and insecticidal effects may be about 12 hours.

When this insecticide tool 10b is not in use, the ventilation hole 12 is sealed with a cap (not shown) or the whole is sealed and packaged with a non-breathable film. The internal exothermic agent 2 may be placed at an appropriate location so that it can generate heat through ventilation through the ventilation holes 12.
As a result, the insecticidal component A is vaporized by internal heat and exhibits an insecticidal effect. Here, since the insecticidal action of the exothermic agent 2 proceeds from the upper side, the heat-sensitive color-changing sheet 13 changes color from the upper side with this heat generation, and the degree of remaining insecticidal effect can be determined by the progress of this color change.

In addition, instead of impregnating the paper cylinder 11, the insecticidal component A can be applied by impregnating wood flour or the like and mixing it inside, or by storing a block impregnated material such as impregnated pine in the upper space of the paper cylinder 11. It's okay.

(Effects) According to the present invention, since the thermosensitive color-changing sheet is attached to the outer surface of the container containing the insecticide and the exothermic agent,
The state of heat generation of the exothermic agent, ie, the state of occurrence of the insecticidal effect by the insecticide, can be clearly determined by the color change of the thermosensitive color-changing sheet.

In particular, since the heat-sensitive color-changing sheet is in the form of a tape and is pasted vertically, the heat-sensitive color-changing sheet also gradually changes in response to the heat generation state of the exothermic agent progressing sequentially from the top to the bottom. The color changes, and depending on the position of the color change, the remaining amount of insecticidal effect of the insecticide can be reliably detected, and therefore, the time to replace the insecticide can be known almost exactly in advance. To ensure that the insecticidal tool is used up to the end, and to appropriately replace the insecticidal tool so that the insecticidal effect is not interrupted.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an insecticidal tool according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view thereof. 2... Exothermic agent, 11... Container, 12... Ventilation hole, 13... Thermosensitive color changing sheet, A... Volatile insecticide.

Claims (1)

[Claims] 1. In a bottomed cylindrical container with a ventilation hole formed on the top surface,
An exothermic agent that generates heat through air oxidation is housed, an insecticidal component that vaporizes due to the heat generated by the exothermic agent is impregnated into at least a portion of the container or the contents of the container, and a heat-sensitive tape is attached to the outer surface of the container. An insecticide made of a discolored sheet pasted vertically. 2. The insecticidal tool according to claim 1, wherein the insecticidal component is impregnated into wood flour contained in a container.