JPH0345731Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial Application Field" This invention relates to a sterilizing cast used to sterilize medical instruments such as scalpels, syringes, and forceps in high-temperature steam.

``Prior Art'' As is well known, as shown in FIG. 3, the sterilizing cast has vent holes 1a each covered by a water-resistant filter material that allows entry of high-temperature steam for sterilizing.
and a container-shaped main body 1 and a lid body 2 having 2a and 2a.
It is made of corrosion-resistant metal such as stainless steel.

The method for using this sterilizing cast is to first put a medical instrument inside the main body 1, close the lid 2, and then put it into a sterilizer that uses high-temperature steam or sterilizing gas, and sterilize it for the required time. Thereafter, the cast is taken out from the sterilizer, and if it is to be used after a short period of time, it is left as is on the table, and if it is not to be used for a long time, it is moved to a predetermined storage location. Note that even if the cast is not used for a long time, the cast is at a high temperature during steam sterilization, so leave it on the table until it reaches room temperature.

``Problems to be solved by the invention'' By the way, the above-mentioned conventional sterilizing cast has the following problems.

(b) In order to prevent germs from entering the interior after sterilization, the main body 1 and the lid are carefully sized with high dimensional accuracy so that there is no gap between the lid 2 and the main body 1 when the lid 2 is closed. Body 2 must be processed. However, in this conventional sterilizing cast, since the processed material is a metal material, a large number of man-hours are required to maintain processing accuracy, and therefore manufacturing costs cannot be reduced. This also applies to the frame for tightly fitting and fixing the water-resistant filters to the ventilation holes 1a and 2a.

(b) Since it is made of metal, it is heavy and inconvenient to transport during use.

(d) Being made of metal, it is prone to wear and deformation;
In addition, the amount of deformation due to temperature differences is large and the dimensional stability is poor.

(d) Since it is made of opaque metal, it is not possible to confirm the objects to be sterilized inside.

(e) Since it is made of metal with high thermal conductivity, in the case of steam sterilization, the temperature is too high to touch it immediately after sterilization. In addition, after taking out the cast from the steam sterilizer, because the cast has good thermal conductivity, the walls are cooled down before the inside, and as a result, residual steam inside the cast is condensed on the inner wall of the cast, which covers the gauze, etc. inside. There is an inconvenience in keeping the sterilized material moist.

This idea was made in view of the above circumstances,
The object of the present invention is to provide a sterilizing cast that is lightweight, transparent, highly dimensionally stable, and inexpensive to manufacture.

"Means for Solving Problems" The sterilizing cast according to this invention has a lid attached to a container-shaped cast main body so as to be openable and closable, and at least one of the side walls, the bottom surface and the top surface of the lid. In the sterilizing cast, the cast has a large number of ventilation holes in one place, and these ventilation holes are covered by a water-resistant filter material, the cast body and the lid are entirely molded from polyetherimide resin, The water-resistant filter material, which covers at least the ventilation hole formed in the side wall of the main body, is fixed to the inner surface of the side wall of the main body in close contact with a frame made of polyetherimide resin provided on the inner surface of the side wall. It is something.

Polyetherimide resin is a resin that combines imide bonds, which have excellent heat resistance and strength, and ether bonds, which have good processability, and is a highly functional resin with processability comparable to that of polycarbonate. The main properties of this resin include its inherent flame retardancy;
Examples include excellent heat resistance, well-balanced mechanical properties, a wide range of excellent environmental properties, transparency, excellent processability, economic efficiency, and the ability to block ultraviolet rays.

"Operation" According to the above configuration, the cast can be easily formed with high dimensional accuracy by injection molding. In addition, the formed cast has excellent heat resistance, good transparency, which makes it easy to check the contents to be sterilized, high strength, excellent durability, and light weight, making it easy to handle. can. Furthermore, the formed cast has low thermal conductivity, so it can be touched immediately after steam sterilization, making it convenient to handle. Since it does not get cold, dew condensation is prevented from forming on the inner wall of the cast, and the objects to be sterilized do not become damp after sterilization. Furthermore, even if polyetherimide resin is broken by impact, it does not break into pieces like glass, so it is highly safe. Furthermore, since the natural color of polyetherimide resin is a transparent amber color, it can block ultraviolet rays, so it can be used for medical materials that need to avoid exposure to ultraviolet rays, such as test paper for checking the output wavelength of laser scalpels. Also suitable for sterilization.

This invention will be explained in more detail below using examples.

"Embodiment 1" FIGS. 1 and 2 show an embodiment of this invention. In the figures, parts common to those in FIG. 3 are given the same reference numerals to simplify the explanation. The feature of the sterilizing cast of this invention is that the entire cast, including the frame 10 for closely adhering and fixing the water-resistant filter to the inside of the vent hole 1a of the cast body 1, is made of polyetherimide resin.

The water-resistant filter is located in the ventilation hole 1 of the cast body 1.
It is fixed to the inner surface of the main body 1 by a frame 10 made of polyetherimide resin and provided on the inner surface of the main body 1 in close contact with the inside of the main body 1. In addition, the lid body 2
As shown in FIG. 2, a window material 11 for internal confirmation is made of polyetherimide resin on the inner surface. Polyetherimide resin has greater flexibility than glass, which is also a transparent material, and has a high ability to follow the shape of surrounding members. Therefore, the frame 10
Whether it is the window material 11 or the window material 11, it can be attached to the cast body 1 or the lid body 2 while maintaining airtightness by easily bringing the window material 11 into close contact with the mounting portion.

In this way, if the entire cast is made of polyetherimide resin by injection molding, it can be manufactured at low cost, and the resulting cast has high dimensional stability. Made of resin, it has excellent heat resistance, good transparency makes it easy to check the objects to be sterilized inside, high strength makes it durable, and light weight makes it easy to handle. . Furthermore, the formed cast has low thermal conductivity due to the characteristics of polyetherimide resin, so it is convenient to handle as it can be touched immediately after steam sterilization, and it can be left to cool in the outside air. Since the wall part does not cool significantly before the inside, dew condensation is prevented from forming on the inner wall of the cast, and the objects to be sterilized inside do not become damp after sterilization. In addition, even if polyetherimide resin is broken by impact, it will not break into pieces like glass, so even if the cast breaks due to a fall, etc., the broken pieces will not get mixed up with medical supplies, etc. inside. Problems can be avoided and safety is high. Furthermore, since the natural color of polyetherimide resin is a transparent amber color, it can block ultraviolet rays, so it can be used for medical materials that need to avoid exposure to ultraviolet rays, such as test paper for checking the output wavelength of laser scalpels. It can also be sterilized, and even after sterilization it can remain in the cast until it is ready for use, even if the window area is increased to facilitate internal confirmation. The thickness of the cast body is 1.5 to 10 mm, preferably 2.5 to 5 mm.
It is. This is because if it is less than 1.5 mm, there is a problem in terms of strength, and if it is more than 10 mm, it becomes difficult to visually inspect the contents.

"Effects of the invention" As explained above, the sterilizing cast according to the invention has a lid attached to the container-shaped cast main body so as to be able to be opened and closed, and at least the side walls of the cast main body, the bottom surface and the top surface of the lid. In the sterilizing cast, which has a large number of ventilation holes in one place and which are covered by a water-resistant filter material, the cast body and the lid are entirely molded from polyetherimide resin. , the water-resistant filter material that covers at least a ventilation hole formed in the side wall of the main body is tightly fixed to the inner surface of the side wall of the main body by a frame made of polyetherimide resin provided on the inner surface of the side wall. It is characterized by the fact that Polyetherimide resin is a resin that combines imide bonds, which have excellent heat resistance and strength, and ether bonds, which have good processability.
It is a highly functional resin with processability comparable to that of polycarbonate. The main properties of this resin include inherent flame retardancy, excellent heat resistance, well-balanced mechanical properties, a wide range of excellent environmental properties, transparency, excellent processability, economic efficiency, and the ability to block UV rays. , etc.

Therefore, the sterilizing cast of this invention can be easily formed with high dimensional accuracy by injection molding, and since the polyetherimide resin is flexible, it can cover the ventilation holes formed in the side wall of the main body. The water-resistant filter material can be fixed to the inner surface of the side wall of the main body in close contact with a frame provided on the inner surface of the side wall. In addition, the formed cast has excellent heat resistance, good transparency, which makes it easy to check the objects to be sterilized, high strength, excellent durability, and light weight, which makes it easy to handle. can. Furthermore, the formed cast has low thermal conductivity, so it can be touched immediately after steam sterilization, making it convenient to handle. Since it does not get cold, it prevents condensation from forming on the inside wall of the cast.
The object to be sterilized does not become damp after sterilization. Furthermore, even if polyetherimide resin is broken by impact, it does not break into pieces like glass, so it is highly safe. Furthermore, since the natural color of polyetherimide resin is a transparent amber color, it can block ultraviolet rays.
It is also suitable for sterilizing medical materials that need to be protected from UV exposure, such as test paper for checking the output wavelength of laser scalpels.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of this invention. Figure 1 is a perspective view of a sterilizing cast with a water-resistant filter installed on the main body and lid, and Figure 2 is a perspective view of the sterilizing cast. FIG. 3 is a perspective view of a conventional sterilizing cast, showing a state in which a water-resistant filter is provided on the side surface of the main body and a window material is provided on the lid. 1... Cast body, 2... Lid body, 1a, 2a...
...Vent hole, 10...Frame, 11...Window material.

Claims (1)

[Claims for Utility Model Registration] A lid body is attached to a container-shaped cast body so as to be openable and closable, and a large number of ventilation holes are provided in the side wall of the cast body and at least one of the bottom surface and the top surface of the lid body. In the sterilizing cast, the cast body and the lid are entirely molded from polyetherimide resin, and the vent holes are covered with a water-resistant filter material. A sterilizing cast, characterized in that the water-resistant filter material covering the body is tightly fixed to the inner surface of the side wall of the main body by a frame made of polyetherimide resin provided on the inner surface of the side wall.