JPH1162331A - Antibacterial door-knob cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antibacterial door-knob cover, by which the surface of a door knob can be maintained sanitarily and which can be installed simply by a simple constitution. SOLUTION: The door cover 10 includes a hollow-shaped cold shrinkable- cover raw material, in which size in the vertical direction to a shaft is made larger than the maximum diameter of a door knob 5 and length in the axial diection is made slightly longer than the length of the door knob 5. The door- knob cover 10 is constituted of a tube body made up of a raw material, in which an antifungus agent, in which silver ions are carried to inorganic high molecules composed of an ion group forming network structure and a modified ion group, is contained uniformly within a range of 0.1-2.0 wt.% per the whole of the door-knob cover raw material, and a spacer at that time. The door-knob cover 10 can be mounted simply and finely without being limited by the shape of a cylindrical door knob, and static discharge can be prevented in winter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold shrinkable cover for a doorknob, and more particularly, to a doorknob which can be touched by an unspecified number of people, regardless of its shape and without using a fire or a heat source. The present invention relates to providing an antibacterial door knob cover which can be easily mounted, can maintain antibacterial and antifungal on the surface of the knob and can maintain it hygienically, and can prevent electrostatic discharge and maintain comfort in winter.

[0002]

2. Description of the Related Art Door knobs having antibacterial and antifungal properties developed to ensure hygiene of doorknobs that are touched by an unspecified number of people, such as toilets and entrance doors, are entirely made of an antibacterial metal material. Known door knobs and door knobs whose surfaces are coated with a metal having antibacterial and antibacterial properties are known.

[0003]

However, according to the door knob made of the above-mentioned conventional antibacterial metal material or the door knob coated with the antibacterial metal, there is a problem that the cost is extremely high.

The present invention has been made in view of the above circumstances, and an object of the present invention is not to be limited to the shape of a cylindrical door knob, and to easily and neatly mount without using a fire or a heat source. It is necessary to provide an antibacterial doorknob cover that is constructed so that the surface of the doorknob can always be antibacterial and antifungal and can be maintained hygienically, and in winter, it can prevent electrostatic discharge and maintain comfort. Is what you do.

[0005]

The gist of the means adopted by the present invention for that purpose is as set forth in the appended claims.

According to the antibacterial doorknob cover according to the first aspect, since a cold shrinkable cover material containing an antibacterial agent having antibacterial and antifungal properties is used, the surface of the doorknob is The inner surface can be fitted in close contact without the use of a fire or heat source and without entanglement on the surface, thus protecting the whole. In other words, even if the difference in the outer diameter of the door knob is large,
Has antibacterial and antifungal properties that are resistant to tearing and cracking, and that can be applied to various types (shapes) of doorknobs and do not require the provision of cold shrinkable cover bodies corresponding to the dimensions and shapes of the doorknobs. The effect that the room-temperature shrinkable cover can be provided at low cost is obtained.

Further, the antibacterial door knob cover of the present invention is configured so that an antibacterial agent is contained in the room-temperature shrinkable cover material.
It is antifungal and can be kept hygienic.

Furthermore, in winter, electrostatic discharge can be prevented and comfort can be maintained.

In particular, according to the antibacterial door knob cover according to the second aspect, an effect is obtained that the thermal stability can be maintained at least up to -20 to 60 ° C. and the cold and heat resistance is excellent.

[0010] According to the antibacterial door knob cover of the third aspect, in addition to the above-described action, the main component of the antibacterial agent is (1R, 2S, 3R, 5S, 6R) -3,5-.
Schiff base derivatives of diamino-6- (2,6-diamino-2,6-dideoxy-α-D-glucopyranosyloxy) cyclohexane-1,2-diol (aminoglycoside antibiotic) and terephthalaldehyde ,
(1R, 2S, 3R, 5S, 6R) -3,5-diamino-6- (2,6-diamino-2,6-dideoxy-α-
D-glucopyranosyloxy) cyclohexane-1,2
-Since the diol content is 45% by weight or more based on the whole, excellent antibacterial and antifungal performance can be obtained even if the content is 1.0% by weight or less.

According to the antibacterial door knob cover of the invention according to claims 4 and 5, the antibacterial agent is an inorganic polymer such as glass or silica gel composed of a group of ions forming a network structure and a group of modified ions. Since, for example, a metal ion having antibacterial and antifungal properties such as silver ion, copper ion, zinc ion, or tin ion, or a metal salt containing these metal ions as a constituent element is supported, resin Heat resistance performance that is equal to or higher than the molding operation temperature at the time of kneading and molding can be ensured. That is, the effect is obtained that these antibacterial agents can be kneaded into the resin and molded without losing the antibacterial and antifungal performance.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An antibacterial doorknob cover according to the present invention is a cold shrinkable cover containing an antibacterial agent formed so as to cover the surface of a doorknob. Although described in detail, this is a typical one, and the present invention is not limited by the following examples unless the gist is exceeded.

FIG. 1 is a sectional view schematically showing an antibacterial doorknob cover 10 of the first embodiment before being mounted on the doorknob. The cover 10 has a hollow tube body 1 (having a diameter of 54 to 57 mm, a diameter of which is slightly larger than the maximum outer diameter of the door knob and whose axial length is slightly longer than the door knob). Length 40-50mm, thickness 1
-3 mm), and a plastic spacer 2 attached to hold the tube body 1 in an expanded state.
When the spacer 2 is disassembled and removed, as shown in FIG. 2, the tube body 1 contracts in the radial direction and extends in the length direction, and as shown in FIG. Can be brought into close contact with the surface of the door knob 5.

The tube body 1 is formed of a resin material that shrinks at room temperature, and an antibacterial agent is almost uniformly kneaded and mixed throughout.

As a raw material of the tube body 1, polyethylene, polypropylene, polystyrene, acryl, polyester, polycarbonate, polyvinyl chloride, polyamide resin, fluorine resin, etc. can be used.
For example, if the rubber is excellent in rubber elasticity such as ethylene propylene rubber, silicon rubber, natural rubber, etc., the inner surface of the door knob can be used without using a fire or a heat source, and without being entangled with the surface, and It can be fitted in close contact and protects the whole smoothly and reliably. That is, even if there is a large difference in the outer diameter of the door knob, it is unlikely to be torn or cracked, and at room temperature corresponding to the dimensions and shape of the door knob. It is very preferable because it is not necessary to prepare a shrinkable cover body and can be applied to various kinds of door knobs and can be provided at a low price.

The antibacterial agent has a heat resistance higher than the molding operation temperature at the time of molding the raw material into the tube 1, and can be kneaded and molded without losing the antibacterial and antifungal performance. It does not matter whether it is an organic antibacterial agent or an inorganic antibacterial agent.

More specifically, the inorganic antibacterial agent is as follows:
Zeolite compounds, apatite compounds, zirconium phosphate
Compound, calcium phosphate compound, silicate glass
Titanium oxide, zinc oxide and natural magnesium oxide
At least silver ion, copper ion, zinc ion
Some contain some. Furthermore, form a mesh structure
Ions (network formers) and modified ions
(Modifier) and the inorganic polymer
Silver ion, copper ion, zinc supported on polymer
Metal ion such as ion or tin ion, or this
Any of the metal salts containing these metal ions as constituents
Or thiosulfato silver complex (Na _Three[Ag (S_TwoO_Three)
_Two]) And metal complexes containing silver ions, such as
It may be.

These inorganic antibacterial agents are blended in an amount of 0.1 to 2.0% by weight based on the whole door knob cover. The reason is that when the content is 0.1% by weight or less, the antibacterial and antifungal effect exhibited is weak, and when the content is 2% by weight or more, the antibacterial and antifungal effect corresponding to the content cannot be obtained, This is because the antibacterial agent is wasted.

Examples of the organic antibacterial agents include imidazole, thiazole, iodine, nitrile, phenol, haloalkylthio, pyridine, triazine, and bromo antibacterial agents. That is, for example, E. coli,
Any gram-positive bacteria such as staphylococci and streptococci and gram-negative rods such as Pseudomonas aeruginosa and Bacillus subtilis may be used. More specifically, for example, a synthetic antibacterial agent such as nalidixic acid, nitrofurazone, or sulfa drug, penicillin, macrolide, aminoglycoside, cephalosporin, chloramphenicol, tetracycline, and polypeptide , Lincomycin or polyene antibiotics, (1R, 2S, 3R, 5S, 6R) -3,5
-Diamino-6- (2,6-diamino-2,6-dideoxy-α-D-glucopyranosyloxy) cyclohexane-1,2-diol (aminoglycoside antibiotic)
And Schiff base derivatives of terephthalaldehyde and the like.

When the inorganic polymer is silica gel and the metal ions are silver ions, the heat resistance is about 210 ° C. This heat-resistant performance, ethylene propylene rubber, silicone rubber and natural rubber, polyethylene, polypropylene and other olefin-based resin materials,
Or, since the temperature is higher than the molding operation temperature of ABS resin material, it means that even if these resin materials are kneaded and molded, the antibacterial and antifungal performances do not disappear or deteriorate. I do.

When the antibacterial doorknob cover 10 of the first embodiment adopting such a configuration is put on the doorknob 5 and then the spacer 2 is disassembled and removed, as shown in FIG. The inner surface of the door knob 5 can be shrunk and extended in the length direction so that the inner surface of the door knob 5 is in close contact with the surface of the door knob 5, whereby the surface of the door knob 5 is indirectly provided with antibacterial and antifungal properties.

Therefore, the present invention can be applied to the door knob 5 to be protected regardless of whether the outer diameter difference in the axial direction is small or the door knob 5 has a large outer diameter difference. It is not necessary to prepare a cold shrinkable cover corresponding to the shape of the door knob 5, and after mounting, the tube body 1 of the maximum outer diameter portion is always subjected to excessive elongation and can maintain rubber elasticity. Since the diameter has not been expanded to near the limit value, there is no possibility of easy tearing or cracking. In other words, an extremely remarkable effect can be obtained that an extremely effective antibacterial door knob cover can be provided at low cost.

[0023]

EXAMPLE The following test was conducted on the antibacterial agent in which the inorganic polymer supported silver ions on glass in the antibacterial door knob cover 10 of the first embodiment.

When a single dose of 5000 mg / kg was administered to mice with acute oral toxicity, no abnormalities or deaths were observed.

According to the method of OECD Chemical Toxicity Test Guideline for Skin Primary Irritation (1981), no irritation was observed in rabbits.

No increase in the number of revertant colonies was observed by the method of Notification of the Ministry of Mutagen Labor Notification No. 77 (September 1, 1988), and the mutagenicity was negative.

Skin sensitization Test was conducted by the MAXIMIZATION method using guinea pigs, and it was determined that there was no skin sensitization.

No problems were observed in eye irritation, phototoxicity, and repeat insult patch tests.

Next, the inorganic polymer is glass, and an antibacterial agent having silver ions supported thereon is 0.2% by weight based on the whole.
The following test was performed on the tube body contained at the ratio of:

Evaluation of antibacterial performance The antibacterial and antifungal performance was evaluated by the "film adhesion method" recommended by the Study Group for Inorganic Antibacterial Agents such as Silver (according to the 1995 edition). Escherichia coli and Staphylococcus aureus were used as test bacteria.

A) Test Method Bacterial Counting Method In accordance with the Society for the Study of Inorganic Antibacterial Agents such as Silver “Self-Specific Standards for Silver and Other Inorganic Antibacterial Agents and Antibacterial Testing Methods, Antibacterial Testing Method〓Film Adhesion Method” The sample (about 50 mm x 50 mm) is placed in a jar with a lid and sterilized. The test bacteria pre-cultured were 1/500
5-30 × 10 ⁵ per 1 ml of diluted normal broth medium
Adjust so that the number of bacteria is equal to the number of cells.
1 inoculate. After inoculating the inoculated solution with a stomacher film so as to uniformly wet the sample, the cells are cultured at 37 ° C. while maintaining the humidity. The number of viable cells at the start of culture and after 24 hours was measured by diluting with sterile buffered saline. The results are shown in Table 1 below.

Table 1 Test pieces ( number of viable bacteria per specimen) 24 hours after start to blank Bacteria reduction rate (%) E. coli blank 8.2 × 10 ⁵ 2.6 × 10 ⁴ Additives Less than 8.2 × 10 ⁵ 10 99.95 Yellow Bud Blank 6.5 x 10 ⁵ 1.2 x 10 ³ S. aureus additive 6.5 x 10 ⁵ Less than 10 99.30

The minimum growth inhibitory concentration (MI
C) was studied. The results are shown in Table 2 below.

Table 2 Bacterial name MIC (ppm) Escherichia coli 150 Pseudomonas aeruginosa 150 Salmonella 150 Klebsiella 150 Staphylococcus aureus 300 Bacillus subtilis 300 Black koji mold 150 Blue mold 150 Kratosporium 150 Ketomium 150 Hisokuramis 300 It was found to have an antifungal spectrum.

[0035]

Since the present invention is configured as described above, the following effects can be obtained. (1) Excessive tensile stress does not remain in the tube body at the part attached to the maximum outer diameter part of the door knob, so that the tube body is not torn or cracked by a small external impact. (2) It can be easily and neatly mounted without being limited by the shape of the tubular door knob and without using fire or a heat source. (3) Antibacterial and antifungal can be constantly provided on the surface of the door knob, and this can be maintained hygienically. (4) In winter, electrostatic discharge can be prevented and comfort can be maintained. (5) Since heat stability can be maintained at least up to -20 to 60 ° C, it is excellent in cold and heat resistance. (6) An antibacterial agent can be kneaded into a resin and molded without losing antibacterial and antifungal performance. Etc., and its effectiveness is extremely high.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an antibacterial doorknob cover of a first embodiment before being mounted on a doorknob.

FIG. 2 is a front view showing the tube when the spacer is disassembled and removed from the antibacterial door knob cover shown in FIG. 1;

FIG. 3 is a front view showing a state in which the antibacterial door knob cover shown in FIG. 1 is brought into close contact with the surface of the door knob.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tube body 2 ... Spacer 5 ... Door knob 10 ... Antibacterial door knob cover which is an example of the embodiment of the present invention

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29L 23:00

Claims (5)

[Claims] 1. A doorknob cover made of a hollow cold-shrinkable cover material whose dimension in the direction perpendicular to the shaft is larger than the maximum outer diameter of the doorknob and whose axial length is slightly longer than the length of the doorknob. An antibacterial door knob cover, wherein the cold shrinkable cover material is substantially uniformly kneaded with an antibacterial agent. 2. The antibacterial door knob cover according to claim 1, wherein the cold shrinkable cover material is any one of ethylene propylene rubber, silicone rubber, and natural rubber. 3. The antibacterial door knob cover, wherein the antibacterial agent is (1R, 2S, 3R, 5S, 6R)-
3,5-diamino-6- (2,6-diamino-2,6-
It is a Schiff base derivative of dideoxy-α-D-glucopyranosyloxy) cyclohexane-1,2-diol and terephthalaldehyde, (1R, 2S, 3R, 5S,
6R) -3,5-diamino-6- (2,6-diamino-
2,6-dideoxy-α-D-glucopyranosyloxy) cyclohexane-1,2-diol is contained in a proportion of 45% by weight or more based on the entirety thereof, and the content is based on the whole door knob cover. 0.01 ~
2. The composition according to claim 1, wherein the content is within a range of 1.0% by weight.
Or the antibacterial door knob cover according to 2. 4. The antibacterial door knob cover, wherein the antibacterial agent comprises: an inorganic polymer composed of a group of ions forming a network structure and a group of modified ions; and a metal salt or metal ion carried on the inorganic polymer. , And the content of the antibacterial agent is 0.1 to 2.
3. The composition according to claim 1, wherein the amount is in the range of 0% by weight.
Antibacterial door knob cover as described in. 5. The antibacterial door knob cover, wherein the inorganic polymer is a vitreous molecule and the metal salt is a salt containing any one of silver ion, copper ion, zinc ion and tin ion. 5. The method according to claim 4, wherein the metal ions are silver ions, copper ions, zinc ions, or tin ions.
Antibacterial door knob cover as described in.