JPH0624500U - Petri dish - Google Patents

Abstract

(57) [Summary] [Purpose] The required culture environment conditions can be reliably obtained, good discardability is achieved, and space can be stacked, and the flow path of air that flows between the inside and outside of the main body during sterilization. To provide a petri dish that secures the above and enables a reliable and prompt sterilization treatment. In a petri dish having a dish-shaped main body 11 having a peripheral wall 14 formed on an outer edge portion of a bottom plate 13 and a lid body 12 mounted to cover an upper opening 11a of the main body 11, the main body 11 and the lid body 12 are A strip-shaped circular ring 15 is formed on the peripheral wall 14, which has a hanging piece 16 standing outside the peripheral wall 14 at the outer edge and borders the upper opening 11a. When the lid 12 is attached to the main body 11, the step portion 17b (locking portion) that has entered the ring 15 side is formed, and when the lid 12 is attached to the main body 11, the step portion 17b comes into contact with the outer surface of the belt-shaped circular ring 15 and the lid 12 and the belt-shaped circle. Protrusions 18c that prevent close contact with the ring 15
(Means for preventing adhesion) was formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a petri dish capable of containing a medium for culturing bacteria and the like.

[0002]

[Prior art]

 BACKGROUND ART Heretofore, there has been known a petri dish made of glass or plastic having a dish-shaped main body having a peripheral wall formed on the outer edge of the bottom plate, and a lid mounted to cover an upper opening of the main body.

The petri dish 1 shown in FIG. 4 (a) is made of plastic, has a peripheral wall 3 around the bottom plate 2, and is provided with a protrusion 4 protruding from the back surface of the bottom plate 2. A recessed notch 5 is provided in the. This petri dish 1 can be stacked in a plurality of layers by fitting the upper end of the peripheral wall 3 into the concave notch 5 of the bottom plate 2 (see Japanese Utility Model Publication No. 55-51200).

A lid 6 shown in FIG. 4B has a stackable structure. The lid 6 is partially provided with an inverse taper portion 9 between the peripheral edge portion 7 and the central recess portion 8. By placing the bottom surface of the central recess portion 8 on the inverse taper portion 9, a plurality of layers are layered. Can be stacked on top of each other (see Japanese Utility Model Publication No. 43-9415).

Like the lid 6, for example, by providing a locking portion (reverse taper portion 9) for stacking inside the peripheral wall (peripheral portion 7) of a petri dish, the bottom portion of the petri dish is inserted into another petri dish. It is possible to stack a plurality of petri dishes in a layered state in a stacked state, and it is possible to make the stacked height lower than that of the dish 1.

Then, for example, culture of bacteria, tissues, etc. is performed by the medium contained in the petri dish.

Although the petri dish 1 is sterilized by EOG (ethylene oxide gas) sterilization, γ-ray sterilization, etc., efficient treatment is possible by stacking the lid and main body in layers. Becomes

[0008]

[Problems to be solved by the device]

 However, in a glass petri dish, it is necessary to wash and sterilize it after use, but it is not necessary to return it to the initial state even if it is washed and sterilized if it is used many times, so it is always necessary. There is a problem that it is not possible to obtain the culture environment conditions, and there is also a problem that disposability cannot be satisfied in a plastic petri dish that is not reused because various restrictions are involved in discarding it. It was

In addition, the petri dish has a structure that allows a plurality of layers to be stacked, but in order to allow the bottom part to enter the inside and to enable space-saving stacking, for example, stacking inside the peripheral wall is possible. When the locking portion for use is provided, there is a problem that the medium is placed on the mounting portion formed on the locking portion.

Further, when performing EOG sterilization, γ-ray sterilization, or the like, if the main body is covered with the lid, the inside and outside of the main body may be blocked and sterilization inside the main body may not be performed sufficiently. There was also a problem.

The present invention has been made in view of the above problems, and an object thereof is to ensure that the necessary culture environmental conditions can be obtained without re-use, and at the same time, it is easily incinerated. It has good disposability due to the provision of, and also allows the space to be stacked by allowing the bottom part to enter the inside of another body without providing a locking part for stacking inside the peripheral wall. An object of the present invention is to provide a petri dish that ensures a swift sterilization process by ensuring a flow path of air that travels between the inside and outside of the main body when sterilization is performed with the main body covered by the lid.

[0012]

[Means for Solving the Problems]

 In order to achieve the above object, a petri dish according to the present invention is a petri dish having a dish-shaped main body having a peripheral wall formed on an outer edge portion of a bottom plate, and a lid body mounted to cover an upper opening of the main body. The main body and the lid are formed of an easily incinerable material, and a belt-shaped ring is formed on the peripheral wall, which has a hanging piece that stands parallel to the outside of the peripheral wall at an outer edge portion and borders the upper opening. The hanging piece is formed with a locking portion that is inserted into the side of the belt-shaped ring, and when the lid is attached to the body, the lid is brought into contact with the outer surface of the belt-shaped ring and the lid and the lid. The feature is that a contact prevention means is formed to prevent contact with the belt-shaped ring.

[0013]

[Action]

 The petri dish according to the present invention has a good disposability because it can be easily incinerated by the main body and lid made of an easily incinerable material, and has a hanging piece formed on the outer side of the peripheral wall. By providing the locking part, it is possible to stack space-saving without having a protruding part inside the main body, and further, due to the adhesion preventing means, during sterilization performed with the main body covered by the lid, A secure and quick sterilization process can be achieved by ensuring a flow path for air that travels inside and outside the body.

[0014]

【Example】

 An embodiment of a petri dish according to the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, the petri dish 10 has a plastic main body 11 and a lid body 12.

The main body 11 and the lid 12 are formed by sheet-molding a resin material having an incineration property such as A (amorphous = non-crystalline) -PET (polyethylene terephthalate) and PET-G (non-crystalline fusible PET). It is formed by

The main body 11 has a disk-shaped bottom plate 13 and a cylindrical peripheral wall 14 projecting upward over the entire outer edge of the bottom plate 13 and is formed in a dish shape having an upper opening 11 a. ing. The peripheral wall 14 is inclined slightly outward as it goes upward.

The bottom plate 13 has a circular groove 13a formed along the peripheral wall 14 at the outer surface of the inner surface of the peripheral wall 14, and the surface of the bottom plate 13 inside the groove 13a is formed by a flat surface. There is. The groove 13a protrudes to the back surface side and forms a ridge 13b along the back surface peripheral edge (see FIG. 2C).

The peripheral wall 14 forms a belt-shaped annular ring 15 formed of a belt-shaped flat surface that rises from the outer edge portion and borders the upper opening 11 a, and then a hanging piece 16 that stands on the outer side of the peripheral wall 14 apart from the peripheral wall 14. And is formed integrally with the upper portion of the peripheral wall 14 being bent outward.

The hanging piece 16 is inclined slightly outward as it goes downward, has a tip 16a that is located approximately in the middle in the height direction of the peripheral wall 14 and is formed in a flange shape toward the outside. It has four stacking ribs 17 arranged at equal intervals over the entire circumference.

The stacking rib 17 includes a hypotenuse portion 17a having a larger inclination angle than the peripheral wall 14, and a step portion located at a lower end of the hypotenuse portion 17a and protruding substantially horizontally inside the hanging piece 16 (on the peripheral wall 14 side). (Locking portion) 17b.

Since the oblique side 17a has a larger inclination angle than the peripheral wall 14, the distance between the projecting end 17c of the step 17b and the peripheral wall 14 becomes shorter than the width of the belt-shaped annular ring 15, and The portion 17b is formed so as to enter the band-shaped annular ring 15 side (see FIG. 2C).

The lid 12 has a disk-shaped top plate 18 and a cylindrical peripheral wall 19 projecting downward over the entire circumference of the outer edge of the top plate 18, and has a plate shape having a lower opening 12a. It has such a size that the peripheral wall 19 is located outside the peripheral wall 14 and can be mounted in a state of covering the upper opening 11 a of the main body 11. The peripheral wall 19 is slightly inclined outward as it goes downward.

The top plate 18 has four ridges 18a formed along the outer edge and at equal intervals in the vicinity of the outer edge of the surface, and is located outside the ridge 18a and has each ridge 18a. It has four grooves 18b arranged between them.

The circle formed by the protrusion 18 a has a larger diameter than the circle formed by the groove 13 a of the bottom plate 13. Further, each groove 18b forms each ridge 18c protruding toward the back surface and extending along the periphery of the back surface (see FIG. 3D).

Each of the ridges 18c is formed at a position where it comes into contact with the belt-shaped annular ring 15 when the lid 12 is attached to the main body 11 while covering the upper opening 11a. While being placed on the belt-shaped ring 15 via the gap, there is a gap between the top plate 18 and the belt-shaped ring 15 for separating the protrusion amount of the protrusion 18c (see FIG. 1 (c)). .

Therefore, the ridge 18 c functions as a contact preventing means for preventing the cover 12 and the band-shaped annular ring 15 from contacting each other.

The peripheral wall 19 has a front end 19a formed in a flange shape toward the outside, and also has four stacking ribs 20 arranged at equal intervals over the entire circumference.

The stacking rib 20 has a hypotenuse portion 20 a and a step portion 20 b located at the lower end of the hypotenuse portion 20 a and protruding substantially horizontally and entering the inside of the top plate 18. The stacking ribs 17, 20, the ribs 18a, and the grooves 18b (that is, the ribs 18c) have the above-described function such as forming two grooves 18b at opposite positions. The length and the arrangement position are not limited to those described in the embodiment.

Next, the operation of the petri dish having the above structure will be described.

First, the culture medium is housed in the main body 11 of the petri dish 10 in order to culture, for example, bacteria and tissues.

Since the petri dish 10 is formed by sheet-molding a resin material having an easily incinerable property for both the main body 11 and the lid 12, the amount of material used can be reduced and the incineration process can be easily performed. Therefore, environmental protection is also excellent.

When the medium is stored in the main body 11, for example, if the peripheral wall 14 is formed with a protrusion or the like, the medium may be placed on the protrusion or the like at the time of stirring, etc. Since the step portion 17b is formed on the hanging piece 16 located outside the peripheral wall 14, the inner surface of the peripheral wall 14 of the culture medium storage portion becomes a smooth surface without any unevenness, and the medium can be placed accurately on the bottom surface without adhering. it can.

By the way, the petri dish 10 is subjected to EOG (ethylene oxide gas) sterilization, γ-ray sterilization and the like. At this time, the petri dish 10 is covered with a lid 12 on the main body 11 (see FIG. Even if the layers are stacked in (c)), the protrusions 18c prevent the close contact between the lid 12 and the band-shaped ring 15 by forming a gap between the top plate 18 and the band-shaped ring 15. Therefore, it is possible to secure the flow path of the air flowing between the inside and outside of the main body 11, and to surely and quickly perform the gas introduction during the sterilization and the gas release after the sterilization.

The main body 11 and the lid 12 are stacked and stored when not in use, for example.

At this time, the main bodies 11 are held in a stacking state in which the bottom portions are inserted into the other main bodies 11 by locking the stacking ribs 17 on the strip-shaped annular ring 15 ( As shown in FIG. 2C, the lids 12 are held in a stacking state in which the stacking ribs 20 are locked on the top plate 18 so that the top plate 18 is inserted into another lid 11. Will be performed (see FIG. 3C).

Therefore, the stacking ribs 17 and the stacking ribs 20 allow the main body 11 and the lid body 12 to be stacked with each other in a space-saving stack.

[0038]

[Effect of device]

 According to the petri dish of the present invention, it is possible to reliably obtain the necessary culture environment conditions by not reusing it, and it has good disposability due to the easy incineration property. The bottom plates can be inserted inside without stacking locking parts to enable space-saving stacking.In addition, when performing sterilization with the main body covered with the lid, it is possible to use the lid to remove the lid. Adhesion with the belt-like ring is prevented, and a flow path for air that travels between the inside and outside of the main body can be secured, enabling reliable and prompt sterilization processing.

[Brief description of drawings]

FIG. 1 shows a petri dish according to the present invention, (a)
Is a plan view illustrating the configuration, (b) is a schematic cross-sectional view taken along the line BB of (a), and (c) is a partial explanatory view of a stacking state.

2A and 2B show a main body, FIG. 2A is a plan view, FIG. 2B is a schematic sectional view taken along line BB of FIG. 2A, and FIG. 2C is a partial explanatory view of a stacking state.

3A and 3B show a lid body, FIG. 3A is a plan view, FIG. 3B is a schematic sectional view taken along line BB of FIG. 3A, and FIG. 3C is a partial explanatory view of a stacking state; FIG. 7A is a schematic cross-sectional view taken along line DD of FIG.

FIG. 4A is an explanatory view of a stacking state of a conventional petri dish, and FIG. 4B is an explanatory view of a stacking state of a conventional lid.

[Explanation of symbols]

 10 Petri dish 11 Main body 11a Upper opening 12 Lid body 13 Bottom plate 14 Peripheral wall 15 Belt-shaped annular ring 16 Hanging piece 17b Step (locking portion) 18c Projection (adhesion preventing means)

Claims (1)

[Scope of utility model registration request] 1. A petri dish having a dish-shaped main body having a peripheral wall formed on an outer edge portion of a bottom plate, and a lid mounted to cover an upper opening of the main body, wherein the main body and the lid are easily incinerated. A strip-shaped ring formed of a material, which has a hanging piece parallel to the outer side of the circumferential wall at the outer edge portion and borders the upper opening, and at the same time, the hanging piece enters the strip-shaped annular side. And a contact prevention portion that forms a locking portion and contacts the outer surface of the band-shaped ring when the cover is mounted on the main body to prevent the cover and the band-shaped ring from sticking to each other. A petri dish characterized by forming means.