JPH0657199U - Microbial inspection tool - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a microbe inspection tool in which the agar medium is difficult to peel off. [Structure] A container-shaped main body 1 made of a flexible synthetic resin and a lid body 2. A folding edge 12 is extended outward at the periphery of an opening 11 of the container-shaped main body 1, and an inner peripheral wall 14 of the container-shaped main body 1 is formed. The microbe inspection tool is provided with a protrusion 15.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a microbe inspection tool used for foods and the like.

[0002]

[Prior art]

 For the microbiological test, for example, as shown in Japanese Utility Model Laid-Open No. Sho 60-179199 and Japanese Patent Laid-Open No. Sho 63-214176, an agar medium containing various components was prepared in a petri dish and prepared from test materials. The method of inoculating the agar medium with the solution is generally used, but this method involves indirect inspection of the test material, which requires time and effort to prepare the test solution. In the 1970s, a stamp-type bacterial test tool was developed in which the agar medium was raised from the edge of a rigid synthetic resin container, and it was easy to simply press the surface of the agar medium onto the surface of the test material. Microbiological testing is now possible.

[0003]

[Problems to be solved by the device]

 However, in the food field, many test materials have a convex curved surface, and when the agar medium is pressed against the test material, rubbing occurs on the contact surface and the number of bacteria adhering to the test material is accurately determined. There was a problem that the agar medium could be easily peeled from the container due to an external impact, because it could not be investigated.

An object of the present invention is to solve the above conventional problems and to provide a microbe inspection tool in which the agar medium is less likely to peel off.

[0005]

[Means for Solving the Problems]

 The invention of claim 1 comprises a container-shaped main body made of a flexible synthetic resin and a lid, a folding edge is extended outward at a peripheral edge of an opening of the container-shaped main body, and a projection is formed on an inner peripheral wall of the container-shaped main body. According to a second aspect of the present invention, the bottom surface of the container-shaped main body is formed as a concave curved surface that curves downward.

[0006] The flexible synthetic resin used in the microbiological test device according to the first and second aspects of the present invention is not particularly limited, but it is preferable to use a transparent synthetic resin so that the growth status of bacteria can be visually recognized. , Polystyrene, polypropylene, polyvinyl chloride, polyethylene terephthalate and the like. Further, in order to improve impact resistance, a rubber component such as butadiene may be blended.

The thickness and forming method of the microbe inspection tool are not particularly limited, but it is preferable to form a sheet having a thickness of 0.2 to 0.6 mm by vacuum forming or press forming.

The surface of the microbe inspection tool is preferably roughened so that characters, symbols, etc. can be directly written on with a writing instrument such as a pencil.

The protrusion provided on the inner peripheral wall of the container-shaped main body of the microbe inspection tool may be formed integrally with the main body or may be a separate component fixed with an adhesive or the like. The position, number, and size of the protrusions are not particularly limited, and they may be provided continuously over the entire circumference or intermittently. In the latter case, they all have the same height. It doesn't have to be.

The bottom surface of the container-shaped main body of the microbe inspection tool may be printed or molded with grids so as to be a guide when counting the number of microorganisms after culturing.

The container-shaped main body and the lid of the microbe inspection tool are not necessarily made of the same material, but it is preferable to use the same material in terms of production efficiency. In addition, it is preferable to provide a vertical protrusion or a concave groove on the inner peripheral wall of the lid body so that a space for taking in air necessary for the growth of microorganisms can be secured between the lid body and the container body.

[0012] The agar medium to be filled in the container-shaped body of the microbe inspection tool is not particularly limited, and examples thereof include a semi-solid medium such as standard agar medium, Sabouraud agar medium, desoxycholate agar medium, TC BS agar medium, and TGSE agar medium. The medium may be mentioned.

The microbe inspection tool is sterilized by a method such as ethylene oxide gas (EOG) sterilization, radiation sterilization, electron beam sterilization or the like before filling the agar medium, and among them, EOG sterilization is preferable.

[0014]

[Action]

 According to the invention of claim 1, since the container-shaped main body is made of a flexible synthetic resin, the folding edge is clamped by fingers and bent, and the surface of the agar medium filled in the recess is curved. It can be pressed against the surface of the material, and since the projections are provided on the inner peripheral wall of the container-shaped body, the agar medium does not easily peel off even when bent.

According to the second aspect of the present invention, since the bottom surface of the container-shaped main body is formed into a concave curved surface that curves downward, the surface of the agar medium can be easily formed into a concave curved surface by gripping the folded edges with fingers. It is also possible to press the test material with the convex curved surface easily and to measure the number of microorganisms accurately.

[0016]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the microbe testing device according to the invention of claim 1, FIG. 2 is a cross-sectional view of the container-shaped body, FIG. 3 is a side view of the container-shaped body clamped by fingers, and FIG. FIG. 2 is a perspective view showing an embodiment of the microorganism testing tool of the present invention, and FIG. 2 is a sectional view of the container-shaped body. Example 1 In FIG. 1, reference numeral 1 denotes a container-shaped main body of a microbe inspection tool formed by vacuum forming a flexible synthetic resin sheet. A folded edge 12 having a step portion 13, an upper portion having a circular shape and a lower portion having an octagonal shape is extended outward.

On the inner peripheral wall 14 of the container-shaped main body 1, horizontally long projections 15 are provided by adhesion at substantially equal intervals, and a bottom surface 16 having a convex curved surface is provided so that the thickness of the medium can be made uniform. Square 17 is printed.

Reference numeral 2 denotes a lid body, and four sidewalls 22 vertically extending from the peripheral edge of the disk 21 are provided with four vertically extending recessed grooves 23 projecting inward at substantially equal intervals. .

In the clean bench, the container-shaped body 1 that has been EOG sterilized beforehand is sterilized by high-pressure steam at 121 ° C. for 20 minutes, and the agar medium 3 that has been allowed to cool to around 60 ° C. is raised about 2 mm from the periphery of the opening 11. It was filled in this way and the lid 2 was attached.

At the time of use, the lid 2 is removed from the microbe inspection tool, and as shown in FIG. 3, the folding edge 12 of the vessel-shaped body 1 is clamped by fingers to bend the surface of the agar medium 3. Press contact with the food surface of the inspection material. After reapplying the lid body 2, put it in an incubator and incubate at 37 ° C for 24 hours. When not using an incubator, incubate at room temperature for 36 to 48 hours. After culturing, count the number of colonies formed on the surface, and determine the test material according to the method of distinguishing the agar medium used.

In order to demonstrate the difficulty of peeling the agar medium 3 from the container-shaped body 1 in the present embodiment, the folding edge 12 of the container-shaped body 1 filled with the agar medium 3 is pinched with fingers as described above. Then, the length L of the upper circular portion of the folding edge 12 when the peeling of the agar medium from the container-shaped main body 1 was started was measured, and it was 30 mm. The length L before deformation was 40 mm. On the other hand, when the container-shaped main body having no protrusion was used, peeling started when the length L of the upper circular portion was changed from 40 mm to 36 mm.

Example 2 In FIG. 4, the bottom surface 16 of the container-shaped body 1 is a concave surface curved downward 0.5 to 2 mm from the stepped portion 13 of the folded edge 12 in Example 2. Since it is the same as, the description will be omitted.

[0023]

EFFECTS OF THE INVENTION Since the invention of claim 1 is configured as described above, it is difficult for the agar medium to peel off from the container. Since the invention of claim 2 is configured as described above, accurate microbiological inspection can be performed even for foods whose inspection materials often have convex curved surfaces.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a microbe inspection tool according to the first aspect of the invention.

FIG. 2 is a cross-sectional view of the container-shaped main body of FIG.

FIG. 3 is a side view showing a state where the container-shaped main body is held by fingers.

FIG. 4 is a perspective view showing an example of the microorganism testing tool according to the second aspect of the invention.

5 is a cross-sectional view of the container-shaped body of FIG.

[Explanation of symbols]

 1 Container-like main body 2 Lid 11 Opening 12 Folding edge 14 Inner wall 15 Protrusion 16 Bottom

Claims (2)

[Scope of utility model registration request] 1. A flexible synthetic resin container-shaped main body and a lid, a folding edge extending outward at a peripheral edge of an opening of the container-shaped main body, and a protrusion provided on an inner peripheral wall of the container-shaped main body. Microbial test tool characterized by being obtained. 2. The microorganism testing tool according to claim 1, wherein the bottom surface of the container-shaped main body is a concave curved surface that curves downward.