JP2001112395A - Sterilization of sandbox and repelling of dog and cat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a process for preventing the defecation of dogs and cats intruded in a sandbox and effectively exterminate the sundry germs and mawworms, or the like, in the sand. SOLUTION: A wire heater 4 to generate heat with electric current is embedded in the sand 3 of the sandbox 1 to heat the sand and thermally sterilize the microorganisms and mawworms in the sand. A loud speaker 7 generating ultrasonic wave of a high-frequency region disliked by dogs and cats is placed at a prescribed part of the sandbox to repel the dogs and cats from the sandbox by the ultrasonic wave.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a nursery school, a kindergarten,
Prevents dogs and cats from invading and excreting urine in sandboxes installed in children's playgrounds such as schools and parks, and is effective against Escherichia coli, Salmonella, gallworms, roundworms, etc. that are mixed in sandy areas. The present invention relates to a method for germicidal control.

[0002]

2. Description of the Related Art In general, dogs and cats often enter a sandbox installed in a children's playground at night to excrete.
Therefore, even if the excrement is removed, various bacteria such as Escherichia coli, Salmonella, O157, etc. and eggs such as gall worms and roundworms remain in the sandy soil, which is very unsanitary.

Therefore, conventionally, a method of disinfecting sand in a sandbox with a chemical and a method of heat disinfection have been adopted. In the chemical disinfection method, a cresol solution or a disinfectant mixed with other chemicals is sprayed directly on a sandbox. In the heating disinfection method, sand in a sandbox was transported by a belt conveyor onto a heating device equipped with a heating burner, and passed through a heating booth for disinfection.

[0004]

However, with the conventional chemical disinfection method, immature children, such as kindergartens and nursery schools, are prevented from developing harmful chemicals such as eczema, rash and allergic reactions. Has the problem that it can not be completely, and in the heat sterilization method, the sand in the sandbox is conveyed by a conveyor and sterilized,
Since the sterilized sand is returned to the sand pit again and the process is performed sequentially, unsterilized sand remains, and since the germicidal sand and unsterilized sand are mixed, all the sand in the sand pit must be completely sterilized. However, there is a problem that the sterilization operation must be performed repeatedly in a short period of time because the effect is small in spite of the large sterilization energy and sterilization time.

Accordingly, the present invention prevents stray dogs and stray cats from invading the sandbox, especially at nighttime, and periodically heat-sterilizes the entire sandbox efficiently, effectively and easily. The main purpose is to provide a method that can do this.

[0006]

In order to achieve the above object, the present invention takes the following technical measures. That is, in the method for disinfecting a sandbox and repelling dogs and cats according to the present invention, the linear heating element 4 that generates heat by energization is buried in the sandbox 3 of the sandbox 1 to radiate heat, thereby removing bacteria and roundworms in the sandbox. In addition to heat sterilization, a speaker 7 that oscillates ultrasonic waves having a frequency in a high-frequency band that dogs and cats repel is installed at a predetermined location in a sandbox, and the dogs and cats are repelled from the sandbox by ultrasonic waves. .

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION It is preferable that the linear heating element 4 is permanently provided at the bottom of the sandpit 1 and is supplied with electricity during heat sterilization to generate heat. Thereby, the sterilization operation can be easily performed.

[0008] In addition to the permanent linear heating element 4 provided at the bottom of the sandbox, another linear heating element 4 'is removably disposed on the sandy ground part, and the sand is sandwiched from above and below to perform heat sterilization. By doing so, the temperature rise of the sandy ground can be achieved in a short time. In addition, if a predetermined amount of water is sprayed on the sand before the heat sterilization by the linear heating element, and the surface of the sand is covered with the heat insulating sheet 10 and heated, the water vaporizes and the temperature of the sand increases quickly. At the same time, heat penetrates all over the sand,
The heating effect can be further enhanced.

A switch for turning on and off the power is provided by an external light detection sensor which operates by detecting a change in light in the power supply circuit to the speaker 7, and automatically operates at night. It is preferable to oscillate ultrasonic waves. In this case, an infrared sensor may be separately installed so that ultrasonic waves are oscillated only when the dog or cat enters the sandbox.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 denotes a sandbox, and the inside surrounded by an edge frame 2 is a sandbox 3. A linear heating element 4 that generates heat when energized is laid on the bottom of the sandy ground 3.

As shown in FIG. 5, for example, the linear heating element 4 is composed of an aggregate of carbon fibers as a core wire 4a.
Is covered with a woven or braided cloth 4b made of heat-resistant synthetic resin fiber, and an outer layer covering 4c made of cross-linked vinyl chloride is further surrounded therearound.
What was formed with the structure covered with is preferable. Cross-linked vinyl chloride outer layer coating material 4c to be the outer layer of the linear heating element 4
The polymer is crosslinked between molecules to form a network macromolecule by irradiating high-energy radiation such as an electron beam, beta ray, and gamma ray to the surface of the molded vinyl chloride. Thereby, heat resistance that does not melt even at a temperature of 200 ° C. is provided. The outer layer coating 4c can be formed of another material having heat resistance.

In the embodiment shown in FIG.
Are fixed in a zigzag manner on the surface of the sheet material 5 at a predetermined interval, and are connected to the outlet 6. It is preferable to interpose a heat insulating sheet 11 between the linear heating element 4 and the sheet material 5 as shown in FIG. As a result, the downward heat transfer can be blocked, and the effect of heating the sandy ground can be enhanced. The sheet material 5 provided with the linear heating elements 4 is laid on the bottom surface of the sandbox 1 with the side provided with the linear heating elements 4 facing upward, and sand is placed on the upper surface thereof to form the sand ground 3.
Preferably, the plug insertion port of the outlet 6 is always closed with a screw opening / closing cap 12 as shown in FIG.

A pole 8 having a speaker 7 for oscillating an ultrasonic wave having a high frequency band of 25,000 to 30,000 Hz at a tip thereof is provided on an edge frame 2 of the sandbox 1. Although two poles 8 are provided in the embodiment, the number thereof is increased or decreased according to the area of the sandbox. The speaker 7
Is connected to a power supply via an ultrasonic oscillator, although not shown. The power supply may use a dry battery. The ultrasonic wave oscillated from the speaker 7 preferably has a frequency of 23,000 to 35,000 Hz in a high frequency band that dogs and cats repel. Also, as described above, a switch that operates by detecting a change in light in the power supply circuit to the speaker 7 is provided,
It is preferable to operate automatically at night to emit ultrasonic waves. In addition, an infrared sensor may be separately installed in the sandbox 1 so that ultrasonic waves are oscillated only when a dog or cat enters the sandbox.

When the sandy ground 3 of the sandbox 1 is heated and sterilized, a cord (not shown) from a power supply is connected to the outlet 6 of the linear heating body 4 to cause the linear heating body to generate heat, thereby heating the sandy ground 3. Sterilize. The heating temperature is 75 degrees Celsius to 8 degrees Celsius.
At 0 degrees, the duration may be about 1 minute, but the heating time is preferably 1 hour or more. In this case, as shown in FIGS. 3 and 4, in addition to the linear heating element 4 permanently provided at the bottom of the sandbox 1, the linear heating element 4 prepared separately is used.
A linear heating element 4 'similar to that described above is detachably arranged on the sandy ground portion, and the sandy ground 3 is sandwiched from above and below in a sandwich shape, and is heated and sterilized. Can be.

[0015] The linear heating element 4 'arranged on the sandy ground portion includes:
As shown in FIGS. 3 and 4, the guide 9 is held at the tip end of the guide 9 having a sharp tip so that it can be easily pushed into the sand 3, and is carried to the sand pit during work and pushed into the sand 3 from above. Good. In addition, after a fixed amount of water is sprayed on the sand before heat sterilization, the surface of the sand is covered with a heat insulating sheet 10, and thereafter, the linear heating elements 4, 4 'are heated. As a result, the water is turned into steam to accelerate the temperature rise of the entire sand, and the heat easily penetrates the entire sand, so that the heating effect can be further enhanced. The upper linear heating element 4 ′ is arranged on the upper surface of the plate material like the lower linear heating element 4, and is pushed in from the upper surface of the sand 3 with the linear heating element 4 ′ facing downward. You may do so.

The representative embodiment of the present invention has been described above. However, the present invention is not necessarily limited to the above-described embodiment structure, but may be appropriately modified within a range that has the constituent requirements and has an effect. Of course, it can be implemented.

[0017]

According to the present invention, the method as described above is employed, so that it is possible to prevent dogs and cats from invading the sandbox and urinating and excreting by ultrasonic waves oscillated from the speaker. In addition, there is an effect that the entire sand area of the sandbox can be efficiently and effectively and easily heat-sterilized, and the sand area can be sanitarily held for a long period of time.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a sandbox.

FIG. 2 is an enlarged sectional view of a part of a sandbox.

FIG. 3 is a cross-sectional view showing a state before the upper linear heating element is pushed into sand.

FIG. 4 is a cross-sectional view showing a state in which an upper linear heating element is pushed into sand, and then the upper surface of the sand is covered with a heat insulating sheet.

FIG. 5 is a perspective view of a linear heating element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sandbox 3 Sand ground 4 Linear heating element 7 Speaker

Continued on the front page (72) Inventor Kuniyasu Ichinomiya 1-3-58 Tsurumi, Tsurumi-ku, Osaka City F-term within Nichifu Terminal Industry Co., Ltd. (Reference) 2B121 AA16 AA20 DA43 DA59 DA60 EA21 FA13 FA15 4C058 AA26 BB02 CC05 EE30

Claims (5)

[Claims] 1. A linear heating element (4), which generates heat when energized, is buried in a sand pit (3) of a sand pit (1) to dissipate heat to heat and sterilize bacteria and roundworms in the sand pit, and that dogs and cats A speaker that oscillates ultrasonic waves at frequencies in the high-frequency band to avoid
(7) A method of disinfecting a sandbox and repelling a dog and cat, wherein (7) is installed at a predetermined location in the sandbox (1), and the dog and cat are repelled from the sandbox by ultrasonic waves. 2. The method for sterilizing a sandbox and repelling dogs and cats according to claim 1, wherein the linear heating element (4) is permanently installed at the bottom of the sandbox (1). 3. In addition to the permanent linear heating element (4) at the bottom of the sandbox, another linear heating element (4 ') is detachably disposed on the sandy ground part, and the sand is sandwiched from above and below. 3. The method for sterilizing a sandbox and repelling dogs and cats according to claim 2, wherein the method is heat sterilized. 4. Prior to heat sterilization by the linear heating element (4), a fixed amount of water is sprayed on the sand ground to cover the sand ground surface with an insulating sheet (10), whereby moisture is removed during steam sterilization. 2. The method of claim 1, wherein the heating effect of the sand is enhanced.
4. The method for sterilizing a sandbox and repelling dogs and cats according to any one of claims 3 to 3. 5. The speaker according to claim 1, wherein power is automatically supplied only at night and ultrasonic waves are emitted from said speaker.
The method for sterilizing a sandbox and repelling dogs and cats according to any one of claims 1 to 4.