JP7260707B2 - Metered injection device for pest control - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pest-controlling metered injection device comprising a pest-controlling agent containing a pest-controlling component, a container containing the pest-controlling agent, and an injection mechanism for injecting a fixed amount of the pest-controlling agent from the container.

BACKGROUND ART Conventionally, aerosol injection devices (so-called aerosols) have been used for the purpose of indoor pest control. Injection devices of this type generally contain an aerosol composition containing a stock solution containing a pest control component and a propellant in a container, and the aerosol composition is injected from an injection nozzle provided in the container in accordance with an injection operation by a user. is configured to eject For example, one conventional aerosol injection device is configured to inject an aerosol composition from a single injection port provided in the injection nozzle toward the space on the front side of the injection nozzle (for example, patent See Reference 1).

Japanese Patent Application Laid-Open No. 2004-313939

The conventional injection device described above is adapted to spray an aerosol composition directly onto pests to be controlled. On the other hand, in recent years, an aerosol composition is sprayed into a space where pest control is desired, and fine particles containing pest control components are retained in the space, or the aerosol composition adhering to the walls, floors, etc. of the space is gradually removed. There has been proposed an injection device for continuously controlling insect pests in a space by discharging it into the space. In both the former injection device and the latter injection device, it is desired to further improve the pest control effect on pests to be controlled.

SUMMARY OF THE INVENTION One of the objects of the present invention is to provide a pest-controlling metered injection device that is excellent in pest-controlling effects on pests to be controlled.

[1] In the first aspect of the present invention, the pest control metered injection device comprises:
A pest control agent containing a pest control component, a container containing the pest control agent, and an injection mechanism for injecting a fixed amount of the pest control agent from the container,
The injection mechanism is
An injection part provided with a plurality of injection ports for injecting the pest control agent, and the amount of one injection of the pest control agent injected from the plurality of injection ports is 0.5 to 2.0 ml. is configured to enable a fixed amount of injection within a range,
A space centered on a straight line including the central axis of the injection part is divided into a plurality of nozzles so that the value obtained by equally dividing 360° by the same number of divisions as the plurality of injection ports is the size of the central angle around the straight line. and at least one cluster of the pest control agent injected from each of the plurality of injection ports exists in each of the plurality of divided spaces.

[2] In the second aspect of the present invention, in the pest control metered injection device according to the first aspect,
At least one opening of the plurality of injection ports is configured to be inclined with respect to a plane orthogonal to the straight line.

[3] In a third aspect of the present invention, in the pest-controlling metered injection device according to the first aspect or the second aspect,
An injection port corresponding to at least one of the plurality of injection ports is configured to be inclined with respect to a plane orthogonal to the straight line.

As a result of diligent investigations by the inventors of the pest control metered injection device according to the first aspect, it has been found that the amount of pest control agent injected from a plurality of injection ports at one time is 0.00. A fixed amount (for example, 1.0 ml) within the range of 5 to 2.0 ml, and a space centered on a straight line including the central axis of the injection part (injection button, injection nozzle, etc.) is defined by a plurality of injection ports. It is divided into a plurality of divided spaces so that the value obtained by equally dividing 360° with the same number of divisions is the size of the central angle around the straight line, and clusters of pest control agents are applied to each of the plurality of divided spaces. It has become clear that if at least one is present (see FIGS. 3(a) and 3(b)), an extremely excellent pest control effect can be obtained. Furthermore, according to the fixed quantity injection device for controlling pests of this configuration, a predetermined amount of pest control agent is injected each time the user performs an injection operation. Variation in effect is unlikely to occur, and excellent pest control effect can be stably exhibited.

Therefore, the pest-controlling metered injection device of this configuration is excellent in the pest-controlling effect on the pests to be controlled.

According to the fixed quantity injection device for pest control according to the second aspect, at least one opening of the plurality of injection ports is inclined with respect to a plane perpendicular to a straight line including the central axis of the injection part. Thus, clusters of the pest control agent can more reliably exist in the divided space corresponding to the injection port. In addition, it is preferable that the number of the injection ports whose openings are inclined as described above is large, and it is more preferable that the openings of all the injection ports are inclined as described above.

According to the fixed quantity injection device for pest control according to the third aspect, the injection port corresponding to at least one of the plurality of injection ports is inclined with respect to a plane orthogonal to a straight line including the central axis of the injection part. The presence of the cluster of pest control agent in the divided space corresponding to the injection port can be made more reliable. It is more preferable that the number of the injection holes that are inclined as described above is as large as possible, and that all the injection holes are inclined as described above.

According to the present invention, it is possible to provide a pest-controlling metered injection device that is excellent in pest-controlling effects on pests to be controlled.

The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the following detailed description of the invention (hereinafter referred to as "embodiment") with reference to the accompanying drawings.

FIG. 1 is an external view showing main parts of a pest-controlling fixed quantity injection device according to an embodiment of the present invention. 2(a) to 2(d) show the injection nozzle shown in FIG. 1 when the number of injection ports is four, FIG. 2(a) being a perspective view thereof, and FIG. 2(b) being its 2(c) is a side view thereof, and FIG. 2(d) is a sectional view taken along the line AA of FIG. 2(b). FIG. 3(a) is a cross-sectional view corresponding to FIG. 2(d) showing the diffusion state of the clusters of the jetted aerosol composition, and FIG. 3(b) is the diffusion of the clusters of the jetted aerosol composition. It is a front view which shows a state. FIG. 4 is a diagram for explaining the relationship between the number of injection ports and the diffusion state of clusters of the injected aerosol composition. FIGS. 5(a) to 5(d) are diagrams corresponding to FIGS. 2(a) to 2(d) of the injection nozzle when the number of injection ports is three. 6(a) to 6(d) show a modification of the injection nozzle when the number of injection ports is 4, FIG. 6(a) being a perspective view thereof, and FIG. 6(b) being a front view thereof. 6(c) is a sectional view taken along line CC of FIG. 6(b), and FIG. 6(d) is a sectional view taken along line DD of FIG. 6(b).

<Embodiment>
A pest-controlling metered injection device 10 according to an embodiment of the present invention (hereinafter, simply referred to as "a metered injection device 10") will be described below with reference to the drawings.

(Structure of metered injection device for pest control)
As shown in FIG. 1, a metered injection device 10 according to an embodiment of the present invention includes a hollow cylindrical container 11 filled with an aerosol composition containing an insect control component and a A valve stem 12 projecting upward along the axial direction of the container 11 and ejecting the aerosol composition from the container 11 when pushed downward; and an aerosol cap 13 attached to the upper end of the container 11. I have. As will be described later, the aerosol composition is composed of a stock solution containing an insect-controlling component and a solvent, and a propellant.

The aerosol cap 13 has a cover portion 14 attached to the upper end portion of the container 11 and an injection nozzle 15 connected to the valve stem 12 . and an actuator 16 that engages from. The injection nozzle 15 is housed and fixed in a nozzle housing chamber 19 provided in the actuator 16 . The actuator 16 is swingable via a hinge 17 extending from the front portion of the tip side of the injection nozzle 15 .

The cover portion 14 of the aerosol cap 13 is made of synthetic resin, for example, and its lower end is engaged with a mounting cup 18 provided at the upper end of the container 11 . A virgin seal 20 that covers the actuator 16 is integrally formed on the upper portion of the actuator 16 .

The actuator 16 has a flow path 21 extending in the direction in which the valve stem 12 protrudes (vertical direction; the axial direction of the container 11), and a flow path 22 communicating with the flow path 21 and extending perpendicular to the flow path 21. . A nozzle accommodation chamber 19 in which the injection nozzle 15 is accommodated is communicatively connected to the flow path 22 .

The valve stem 12 is attached to a housing (not shown) attached to a mounting cup 18 so as to be vertically slidable. A spring (not shown) is interposed between the valve stem 12 and the housing. omitted) is always urged upward. When the actuator 16 (in other words, the valve stem 12) is not pushed down, the valve hole (not shown) inside the valve stem 12 is sealed with a stem rubber (not shown) by the biasing force of the spring. As a result, a storage chamber (not shown) of the housing communicating with the inside of the container 11 (not shown), a passage in the stem (not shown) extending vertically through the valve stem 12 communicatingly connected to the flow path 21 of the actuator 16, are not connected.

When the actuator 16 (valve stem 12) is pushed down (that is, when an injection operation is performed), the valve hole of the valve stem 12 separates from the stem rubber, and the reservoir chamber of the housing communicates with the intra-stem passage. As a result, the aerosol composition filled in the storage chamber of the housing flows through the passage in the stem, the flow path 21 and the flow path 22 and the flow path 31 and the injection port 37 of the injection nozzle 15 (FIGS. 2(a) to 37). 2(d), etc.), and the aerosol composition is jetted from the jet port 37. As shown in FIG. When the aerosol composition is injected, the aerosol composition that has become fine particles due to the action of the propellant forms clusters CL (aggregates), and diffuses from the injection port 37 toward the front side of the injection nozzle 15 (Fig. 3 ( a) and FIG. 3(b)).

In this embodiment, the storage chamber of the housing is set so that the total amount of the aerosol composition injected from the plurality of injection ports 37 is a constant amount within the range of 0.5 to 2.0 ml by one injection operation. The volume (shape) of is designed. That is, the fixed quantity injection device 10 is a so-called "fixed quantity injection type" aerosol injection device. Here, the valve stem 12, the injection nozzle 15 and the actuator 16 correspond to the "injection mechanism" of the invention, and the injection nozzle 15 corresponds to the "injection part" of the invention.

The total amount of the aerosol composition injected from the plurality of injection ports 37 in one injection operation may be a value within the range of 0.5 to 2.0 ml, for example, 0.7 to 1.5 ml. A value within the range is preferred, a value within the range of 0.9 to 1.3 ml is more preferred, and 1 ml is even more preferred.

As shown in FIGS. 2(a) to 2(d), the injection nozzle 15 made of resin has a stepped cylindrical shape in which a flow path 31 is formed. The side surface shape of the injection nozzle 15 corresponds to the side surface shape of the nozzle housing chamber 19 provided in the actuator 16. In the present embodiment, the injection nozzle 15 has a large-diameter portion 32 on the tip side and a small-diameter portion on the base end side. a portion 33; At a predetermined position in the axial direction on the outer peripheral surface of the small-diameter portion 33, an annular locking portion 34 for preventing the ejection nozzle 15 from coming off (falling off) from the nozzle housing chamber 19 is provided so as to protrude radially outward. ing.

The flow path 31 extends from the base end of the injection nozzle 15 to the vicinity of the tip along a straight line Ax including the central axis of the injection nozzle 15 . With the injection nozzle 15 housed in the nozzle housing chamber 19 , the proximal opening of the flow path 31 is connected to the flow path 22 inside the actuator 16 .

The tip side surface of the injection nozzle 15 has a circular orthogonal surface 35 orthogonal to the straight line Ax, and a conical surface 36 extending radially outward and proximally from the outer peripheral edge of the orthogonal surface 35 at an angle to the straight line Ax. , consists of A plurality of (in this example, four) injection ports 37 are formed in the conical surface 36 . The plurality of injection ports 37 are circumferentially spaced around the straight line Ax (every 90° in this example), extend along the straight line Ax, and communicate with the flow path 31 at the injection ports 37a. (See FIG. 2(d)).

Since the plurality of injection ports 37 are formed in the conical surface 36, the openings 37b of the plurality of injection ports 37 are inclined along the conical surface 36 from the straight line Ax toward the radially outer side and the proximal side ( See FIG. 2(d)). In other words, the openings 37b of the plurality of injection ports 37 are configured to be inclined with respect to a plane perpendicular to the straight line Ax. Therefore, as shown in FIG. 3(a), the aerosol composition (see the white arrows in the drawing) that has passed through the flow path 31 passes through a plurality of injection holes 37 via an injection hole 37a, and is then injected from an opening 37b. As a result, the clusters CL of the aerosol composition diffuse radially outward from each of the plurality of injection ports 37 while being inclined.

The injection port 37 represents a space connecting the flow path 31 inside the injection nozzle 15 and the outside of the injection nozzle 15 . In addition, the injection port 37a represents the opening portion of the injection port 37 that is closest to the inside of the injection nozzle 15 (that is, the flow path 31 side), and the opening 37b is the portion of the injection port 37 that is closest to the outside of the injection nozzle 15. represents the opening on the side.

Furthermore, in this embodiment, as shown in FIG. It exists in each of the four divided spaces obtained by dividing by the dividing line L passing through the midpoint of the adjacent injection ports 37 in the direction. The width of each divided space (magnitude of central angle θ) is 90°. In other words, the value obtained by equally dividing 360° of the space centered on the straight line Ax by the same number of divisions (=4) as the number of injection ports 37 is the size of the central angle θ around the straight line. At least one cluster CL of the aerosol composition injected from each of the plurality of injection ports 37 exists in each of the plurality of divided spaces (spaces separated by division lines L). The injection nozzle 15 is configured so as to

Thus, in this embodiment, since the number of injection ports 37 is four, the number of divided spaces is four, and the width (central angle) of each divided space is 90°. However, the number of the injection ports 37 is not limited to four, and the clusters CL of the aerosol composition diffusing from each of the plurality (two or more) of the injection ports 37 form a plurality of injections around the straight line Ax. There is no particular limitation as long as it exists in each of the divided spaces divided by the same number of divisions as the mouth 37 . For example, as shown in FIG. 4, the number of divided spaces and the width (central angle) of each divided space can be set according to the number of injection ports 37 (two or more).

For example, when the number of injection ports 37 is three, as shown in FIGS. 5A to 5D corresponding to FIGS. The two injection ports 37 are circumferentially spaced around the straight line Ax (every 120° in this example). In this case, as shown in FIG. 4, the number of divided spaces is three, and the width (central angle) of each divided space is 120°.

In the examples shown in FIGS. 2(a) to 2(d) and FIGS. 5(a) to 5(d), the openings 37b of the plurality of injection ports 37 extend radially outward from the straight line Ax along the conical surface 36. Due to the inclination toward the radial direction, the clusters CL of the aerosol composition are inclined toward the outside in the radial direction and diffuse easily. In addition, as shown in FIGS. 2(d) and 5(d), in these examples, the injection holes 37a of the plurality of injection holes 37 are not particularly inclined with respect to the plane orthogonal to the straight line Ax.

On the other hand, as an example different from the examples shown in FIGS. 2(a) to 2(d) and FIGS. 5(a) to 5(d), as shown in FIGS. A plurality of injection ports 37 may be configured using grooves 41 and 42 extending radially outward, and clusters CL of the aerosol composition may be inclined radially outward to facilitate diffusion.

Specifically, the nozzle 15 shown in FIGS. 6(a) to 6(d) is a stepped cylinder having a small diameter portion 38 formed further on the tip side of the large diameter portion 32 located on the tip side of the small diameter portion 33. It has a shape of A tip side surface of the small diameter portion 38 is composed only of a circular orthogonal surface 39 orthogonal to the straight line Ax. In particular, as shown in FIGS. 6(c) and 6(d), the flow path 31 of the nozzle 15 continuously extends from the large diameter portion 32 to the vicinity of the tip of the small diameter portion 38. As shown in FIG.

A pair of grooves 41 extending in the vertical direction and a pair of grooves 42 extending in the horizontal direction are formed in the orthogonal surface 39 . Each of the grooves 41 and 42 radially extends from the radially inner end equidistant from the straight line Ax to the outer peripheral edge of the orthogonal plane 39 to form the injection port 37 . The jet port 37 communicates with the flow path 31 at a jet port 37 a located at the radially inner end of the grooves 41 and 42 . That is, each of the grooves 41 and 42 extends radially outward from the corresponding injection port 37a and is open at the radially outer end.

Note that, as shown in FIG. 6C, the bottom surfaces 41a of the pair of grooves 41 extend from the injection port 37a in a direction orthogonal to the straight line Ax (that is, along the radial direction). On the other hand, as shown in FIG. 6(d), the bottom surfaces 42a of the pair of grooves 42 extend radially outward and toward the proximal side from the injection port 37a while being inclined with respect to the straight line Ax.

In particular, as shown in FIG. 6(d), by configuring the injection port 37a to be inclined with respect to a plane orthogonal to the straight line Ax, the aerosol composition passing through the injection port 37a is guided to the groove 42 and injected. Since the clusters CL of the aerosol composition are jetted from the port 37, they are easily diffused while being inclined radially outward.

2(a) to 2(d), 5(a) to 5(d), and 6(a) to 6(d). , The injection pressure of the aerosol composition at a position 20 cm away from the injection port 37 is preferably 0.1 to 20 gf, more preferably 0.3 to 10 gf, and more preferably 0.5 to 5 gf. More preferred. This injection pressure was measured at a room temperature of 25° C. with a digital force gauge (model number: DS2-2N, manufactured by Imada Co., Ltd.) laid down at a distance of 20 cm from the injection port 37 of the constant quantity injection device 10 . The injection load is the maximum detected value when the aerosol composition is injected toward the center of a circular flat plate with a diameter of 60 mm attached to the nozzle, and the average injection load is calculated.

Furthermore, the total opening area of the openings 37b of the injection port 37 is preferably 0.05 to 8 mm ² and more preferably 0.2 to 4.0 mm ² from the viewpoint of setting the injection time to a value within a desired range. more preferably 0.4 to 3.0 mm ² . 2(d), 5(d), 6(c) and 6(d). From the viewpoint of setting, it is preferably 0.05 to 8 mm ² , more preferably 0.2 to 3.0 mm ² , even more preferably 0.4 to 2.5 mm ² .

Furthermore, the injection time for one injection operation is preferably within 0.8 seconds, more preferably 0.2 to 0.7 seconds, and more preferably 0.3 to 0.7 seconds. More preferred. By adopting such an injection time, it is believed that the volatility of the pest control component can be efficiently increased, and the sustainability of the efficacy of the pest control component can be enhanced. Methods of adjusting the injection time for one injection operation include, for example, a method of adjusting the inner diameter of the injection port 37 and a method of adjusting the injection pressure.

The aerosol composition filled in the container 11 is composed of a stock solution containing an insect-controlling component and a solvent, and a propellant.

A pest control component is a component capable of killing, repelling, or knocking down target pests. The type of pest control component is not particularly limited, and known compounds can be used.

For example, pest control ingredients include transfluthrin, cyphenothrin, permethrin, pyrethrin, allethrin, phthalthrin, resmethrin, flamethrin, phenothrin, empentrin, prallethrin, imiprothrin, cyfluthrin, cypermethrin, deltamethrin, dimefluthrin, mepafluthrin, tralomethrin, profluthrin, and pyrethroid compounds such as metofruthrin; silicon compounds such as silafluofen; organophosphorus compounds such as fenitrothion, dichlorvos, chlorpyrifosmethyl, diazinon and fenthion; carbamate compounds such as carbaryl and propoxur; Compounds such as methoprene, pyriproxyfen, fipronil, and amidoflumet, peppermint oil, orange oil, fennel oil, cinnamon oil, clove oil, turpentine oil, eucalyptus oil, hiba oil, jasmine oil, neroli oil, peppermint oil, Bergamot oil, butigren oil, lemon oil, lemongrass oil, cinnamon oil, citronella oil, geranium oil, citral, l-menthol, citronellyl acetate, cinnamic aldehyde, terpineol, nonyl alcohol, cis-jasmon, limonene, linalool, 1, Various essential oil components such as 8-cineol, geraniol, α-pinene, p-menthane-3,8-diol, eugenol, menthyl acetate, thymol, benzyl benzoate, and benzyl salicylate, propylene glycol monopropyl ether, propylene glycol mono Butyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, dipropylene glycol dimethyl ether, ethylene glycol monoisobutyl ether, diethylene glycol monoisobutyl ether, diethylene glycol dibutyl ether, diethylene glycol dimethyl ether, and glycol ethers such as triethylene glycol dimethyl ether, and dibasic acid esters such as dibutyl adipate. These may be used individually by 1 type, and may be used in combination of 2 or more type.

The pest control component may be appropriately selected according to the type of target pest. Target pests include, for example, mosquitoes, flies, moths, bees, stink bugs, cockroaches, ants, spiders, pill bugs, ticks, lice, centipedes, caterpillars, millipedes, spiders, horse flies, black flies, butterfly flies, termites, midges, leafhoppers, and bark beetles. , earthworms, earwigs, stains, longhorned beetles, deer beetles, chatatemushi, burrs, and Japanese carpenter moths. For flying pests such as mosquitoes, flies, moths, wasps, gadflies, black flies, midges, leafhoppers, butterfly flies, burrs, and koiga moths, transfluthrin, metofluthrin, profluthrin, phthalthrin, prallethrin, monfluorothrin, and Cyphenothrin and the like are preferred. In addition, against crawling pests such as cockroaches, stink bugs, ants, spiders, pill bugs, mites, lice, centipedes, caterpillars, millipedes, spiders, termites, bark beetles, mealworms, earwigs, and stains, phthalthrin, prallethrin, imiprothrin, permethrin, and phenothrin and the like are suitable.

The content of the pest control component is preferably 0.01 to 70 mass/volume % in the stock solution. When the pest control component is 0.01 mass/volume % or more in the stock solution, a sufficient effect of the pest control component can be obtained, and when it is 70 mass/volume % or less, production suitability is improved. The content of the pest control component is more preferably 0.1% by mass/volume or more, still more preferably 0.3% by mass/volume or more, more preferably 65% by mass/volume or less, and 50% by mass/volume. More preferred are:

The stock solution may contain a solvent for the purposes of adjusting the viscosity of the stock solution, improving production aptitude, and increasing the permeability of the drug to insect pests. Examples of such solvents include hydrocarbon solvents, alcohol solvents, aromatic solvents, water, and ester solvents. Examples of hydrocarbon solvents include aliphatic and alicyclic hydrocarbons such as paraffinic hydrocarbons and naphthenic hydrocarbons, and kerosene such as JIS No. 1 kerosene is preferred. Specific examples include normal paraffin and isoparaffin. Typical normal paraffins have 8 to 16 carbon atoms, and examples thereof include Neothiosol manufactured by Chuo Kasei Co., Ltd., normal paraffin MA manufactured by JXTG Nippon Oil & Energy Co., Ltd., and Alcane C14-C17. Isoparaffins typically have 8 to 16 carbon atoms, such as IP Clean LX, IP Clean HX, Supersol FP25, Isoper-M, Isoper-H, Isoper-E, and , Isoper-L and the like. Examples of alcohol solvents include lower alcohols such as ethanol and propanol, glycerin, and polyhydric alcohols such as ethylene glycol. Examples of aromatic solvents include toluene and xylene. Examples of ester solvents include isopropyl myristate, butyl myristate, hexyl laurate, and isopropyl palmitate.

The solvent content is preferably 30 to 99.99 mass/volume % in the stock solution. When the solvent content in the stock solution is 30% by mass/volume or more, production aptitude can be improved. The solvent content is more preferably 35% by mass/volume or more, still more preferably 50% by mass/volume or more, more preferably 99.9% by mass/volume or less, and 99.5% by mass/volume or less. More preferred.

The stock solution may contain other ingredients as long as they do not impair the effects of the present invention. Other components include, for example, preservatives, pH adjusters, ultraviolet absorbers, deodorants, fragrances, bactericides, antifungal agents, antistatic agents, antifoaming agents, synergists, inorganic powders, surfactants, agents, dissolution aids, and the like.

The content of the undiluted solution is not particularly limited and can be appropriately changed according to the purpose of use of the metered injection device 10 and the combination with the propellant. . When the concentration of the stock solution in the aerosol composition is 1% by volume or more, a sufficient effect of the pest control component can be obtained, and when the concentration is 50% by volume or less, contamination by the stock solution can be reduced. The content of the stock solution in the aerosol composition is more preferably 3% by volume or more, more preferably 5% by volume or more, and more preferably 40% by volume or less, further preferably 30% by volume or less. .

The propellant is a medium for injecting the stock solution, and is pressure-filled into the pressure-resistant container together with the stock solution. Examples of the propellant include liquefied petroleum gas (LPG) such as propane, propylene, n-butane, and isobutane, liquefied gas such as dimethyl ether (DME), carbon dioxide, nitrogen gas, and compressed gas such as compressed air. , and halogenated carbon gases such as HFC-152a, HFC-134a, HFO-1234yf, and HFO-1234ze. The propellant to be used may be appropriately selected according to the compatibility with the stock solution and the container member of the aerosol valve.

The content of the propellant can be appropriately changed according to the purpose of use of the metered injection type aerosol and the combination with the stock solution, and is not particularly limited, but can be, for example, 50 to 99% by volume in the aerosol composition. . When the propellant content in the aerosol composition is 50% by volume or more, the pest control component can be sprayed with fine spray particles, so that the pest control component can be easily diffused and the effect of the pest control component can be easily maintained. Moreover, when the propellant is 99% by volume or less, a sufficient effect of the pest control component can be obtained. The content of the propellant in the aerosol composition is preferably 60% by volume or more, more preferably 70% by volume or more, more preferably 97% by volume or less, and even more preferably 95% by volume or less.

The volume ratio of the stock solution to the propellant in the aerosol composition is preferably 1:99 to 50:50, more preferably 3:97 to 40:60. With such a volume ratio, a sufficient pest control effect can be obtained.

(Evaluation of pest control of metered injection device)
Through various experiments, the present inventors found that, as in the various embodiments described above, in the fixed quantity injection device 10, the injection nozzle 15 is provided with a plurality of injection ports 37, and a space centered on the straight line Ax is formed around the straight line Ax. At least one cluster CL of the aerosol composition injected from each of the plurality of injection ports 37 is present in each of the divided spaces divided by the same number of divisions as the plurality of injection ports 37 (FIGS. 3A and 3B). See FIG. 3(b)), and furthermore, the total amount of the pest control component injected from the plurality of injection ports 37 per injection is a fixed amount within the range of 0.5 to 2.0 ml (for example, 1 .0 ml), it was found that an extremely excellent pest control effect can be obtained as compared with the conventional injection device described above. A test example will be described below.

Aerosol compositions 1-5 were prepared containing pest control ingredients, solvents, and propellants according to the formulations shown in Table 1 below. In addition, hereinafter, the aerosol composition may be described as a "composition". The respective specific gravities are 1.388 (23°C) for transfluthrin, 0.785 (25°C) for ethanol, 0.786 (20°C) for isopropyl alcohol, and 0.56 for liquefied petroleum gas (LPG). (20° C.).

For each of compositions 1 to 6 shown in Table 1, pressure cans for aerosol (compositions 1, 4, 5: capacity 142 ml, composition 2: capacity 59 ml, composition 3: capacity 287 ml, composition 6: capacity 142 ml ) was filled with a stock solution that was a mixture of an insect control component and a solvent, and the pressure can was closed with an aerosol valve (stem (ST) hole diameter 1.0 mm×0.7 mm). Subsequently, liquefied petroleum gas (0.34 MPa (25° C.)) was filled under pressure as a propellant. Furthermore, as shown in Tables 2 and 3 below, the structure of the injection nozzle attached to the pressure can, the amount of the composition injected per injection (one injection amount), and the injected composition The knockdown rate of test insects in various combinations (Examples 1 to 5, Comparative Examples 1 to 9) was measured for the ejection amount of the pest control component contained in the product.

Specifically, regarding the "structure of the injection nozzle" in Tables 2 to 4, the "X type" in the structure of the injection nozzle is shown in Figs. d) represents an injection nozzle having four injection holes, and "three-hole type" represents an injection nozzle having three injection holes as shown in FIGS. 5(a) to 5(d). "Straight type" refers to an injection nozzle (not shown) that has a single injection port that opens in the direction along the straight line of the injection nozzle, and "horizontal type" refers to the horizontal direction on the tip surface perpendicular to the straight line of the injection nozzle. represents an injection nozzle (not shown) having a groove extending into and a single injection hole at the bottom surface of the groove. The total opening area of the openings 37b of the “X-type” injection nozzle is 2.3 mm ² , the total opening area of the openings 37b of the “three-hole type” injection nozzle is 2.7 mm 2 , and the total opening area of the openings 37b of the “horizontal” injection nozzle is 2.7 mm ² . The total opening area of the injection nozzle openings 37b is 0.5 mm ² and the total opening area of the "straight" injection nozzle openings 37b is 2.54 mm ² .

Regarding the "knockdown rate" in Table 2 below, in the center of the test room (length 5.4 m × width 3.6 m × height 2.4 m), each of Examples 1 to 3 and Comparative Examples 1 to 7 The aerosol composition was sprayed under these conditions, and when 3 hours had passed after spraying, female imagoes of Culex aegypti (about 100) were released into the test room as test insects. After 60 minutes, the number of knockdowns (KD number) was measured, and the knockdown rate (=KD number/total number of tested insects×100) was calculated.

Regarding the "knockdown rate" in Table 3 below, the aerosol composition was injected under each of the conditions of Example 4 and Comparative Example 8 in the center of the test chamber similar to Table 2, and 4 hours had elapsed after injection. At that time, adult houseflies (male and female mixed, about 100) were released into the test room as test insects. After 30 minutes, the number of knockdowns (KD number) was measured, and the knockdown rate (=KD number/total number of tested insects×100) was calculated.

Regarding the "knockdown rate" in Table 4 below, the aerosol composition was injected under each of the conditions of Example 5 and Comparative Example 9 in the center of the test chamber similar to Table 2, and 6 hours passed after injection. At that time, adult female Culex aegypti (about 100) were released into the test room as test insects. After 60 minutes, the number of knockdowns (KD number) was measured, and the knockdown rate (=KD number/total number of tested insects×100) was calculated.

As can be seen from the comparison between Examples 1 to 5 and Comparative Examples 1 to 9 shown in Tables 2 to 4, regardless of the type of pest control component, the aerosol composition per injection Regardless of the size of the ejection amount, the aerosol composition is ejected from each of the plurality of ejection ports 37 provided in the ejection nozzle 15 so that the cluster CL exists in each of the above-described divided spaces, and then once. By setting the total amount of the aerosol composition injected from the plurality of injection ports 37 per injection to a constant amount within the range of 0.5 to 2.0 ml (1.0 ml in the above example), an extremely excellent insect pest It was found that a control effect can be obtained.

<Other aspects>
The present invention is not limited to the above-described embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiments, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, number, location, etc. of each component in the above-described embodiment are arbitrary and not limited as long as the present invention can be achieved.

For example, in the above embodiment, the nozzle 15 has a stepped cylindrical shape. may be

Furthermore, in the embodiments shown in FIGS. 2(a) to 2(d) and FIGS. 5(a) to 5(d), all of the openings 37b of the plurality of injection ports 37 are arranged on a plane orthogonal to the straight line Ax. It is configured so that there is an inclination with respect to. However, in the metered injection device of the present invention, as long as at least one aerosol composition cluster CL can exist in each of the plurality of divided spaces, at least one of these openings 37b is perpendicular to the straight line Ax. It suffices if it is configured so as to be inclined with respect to the plane.

Here, the features of the embodiments of the constant quantity injection device 10 according to the present invention described above will be briefly described in [1] to [3] below.
[1]
A vermin comprising a pest control agent containing a pest control component, a container (11) containing the pest control agent, and an injection mechanism (12, 15, 16) for injecting a fixed amount of the pest control agent from the container. A fixed quantity injection device for pest control (10),
The injection mechanism (12, 15, 16) is
It has a cylindrical injection part (15) provided with a plurality of injection ports (37) for injecting the pest control agent, and one injection amount of the pest control agent injected from the plurality of injection ports. is configured to be capable of constant amount injection in the range of 0.5 to 2.0 ml,
A space centered on a straight line (Ax) including the central axis of the injection part is equally divided into 360° by the same number of divisions as the plurality of injection ports, and the value obtained is the size of the central angle around the straight line. so that at least one cluster (CL) of the pest control agent injected from each of the plurality of injection ports exists in each of the plurality of divided spaces. there is
Metered injection device for pest control.
[2]
In the pest control metered injection device according to [1] above,
At least one opening (37b) of the plurality of injection ports (37) is configured to be inclined with respect to a plane perpendicular to the straight line (Ax),
Metered injection device for pest control.
[3]
In the pest control metered injection device according to [1] or [2] above,
an injection port (37a) corresponding to at least one of the plurality of injection ports (37) is configured to be inclined with respect to a plane orthogonal to the straight line (Ax);
Metered injection device for pest control.

This application is based on a Japanese patent application (Japanese Patent Application No. 2017-238159) filed on December 12, 2017, the contents of which are incorporated herein by reference.

INDUSTRIAL APPLICABILITY The pest-controlling metered injection device of the present invention is excellent in the pest-controlling effect on pests to be controlled. The present invention having this effect can be used, for example, as an injection device that injects an aerosol composition into a space where pest control is desired to continuously control pests in that space.

10 pest control metered injection device 11 container 12 valve stem (injection mechanism)
15 injection nozzle (injection mechanism)
16 actuator (injection mechanism)
37 injection port Ax straight line CL cluster of pest control agent

Claims (3)

A fixed quantity injection device for pest control, comprising: a pest control agent containing a pest control component; a container containing the pest control agent; and an injection mechanism for injecting a fixed amount of the pest control agent from the container,
The injection mechanism is
An injection part provided with a plurality of injection ports for injecting the pest control agent and a flow path for supplying the pest control agent to the plurality of injection ports, and the pest control agent is injected from the plurality of injection ports. The pest control agent is configured to be able to perform a constant amount injection in which the total injection amount of the pest control agent at one time is a constant amount within the range of 0.5 to 2.0 ml,
A space centered on a straight line including the central axis of the injection part is divided into a plurality of nozzles so that the value obtained by equally dividing 360° by the same number of divisions as the plurality of injection ports is the size of the central angle around the straight line. divided into divided spaces, and at least one cluster of the pest control agent injected from each of the plurality of injection ports exists in each of the plurality of divided spaces,
each of the plurality of injection ports,
It communicates with the flow path through each of a plurality of nozzle holes provided at the flow path end of the flow path extending along the central axis, and has an opening that is a location for injecting the pest control agent to the outside through the nozzle holes. death,
The area of the opening is larger than the area of the nozzle hole,
Metered injection device for pest control. In the pest control metered injection device according to claim 1 ,
at least one of the plurality of injection ports is configured to be inclined with respect to a plane orthogonal to the straight line;
Metered injection device for pest control. In the pest control metered injection device according to claim 1 or 2 ,
wherein the injection port corresponding to at least one of the plurality of injection ports is configured to be inclined with respect to a plane perpendicular to the straight line;
Metered injection device for pest control.

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