JPH05184255A - Device for breeding animal - Google Patents

Abstract

PURPOSE:To obtain a device for breeding animals suitable for reducing installation space, preventing scattering of pollutant and mutual contamination between animals by a simple structure. CONSTITUTION:A device for breeding animals equipped with plural raising shelves 8 laid in the vertical direction in a cabinet 100, a means of forming an air current in the cabinet 100 and exhausting at least partially the air current and a means of cleaning the air current is provided with at least either partition plates 10 attached in a rectangular angle to the plural raising shelves 8 or current plates 4b fixed to an air current guide part of each raising shelf 8 to make a circulating flow in the cabinet 100 flow separately in each space of the plural raising shelves 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an animal experiment device, and more particularly to an animal breeding device suitable for preventing cross contamination of domestic animals.

[0002]

2. Description of the Related Art With the recognition of the importance of animal experiments, there is a demand for expansion of animal experiment equipment from the viewpoint of preventing infection of experimenters and protecting the surrounding environment. An animal breeding apparatus that raises infected small animals in a cabinet room and at the same time performs experimental work requires a safety cabinet with a particularly high safety. As a device of this type, published by Ryukan Kita, "Biomedica", Vol.2, NO.10 (October 1989), page 98-
It is disclosed on page 99, for example, as shown in FIG.
By providing a single laminar basin in front of the animal breeding space 5, it was necessary to take care that cross contamination between breeding animals would not occur. The airflow system employs a partial circulation and partial exhaust system, and each airflow contains particles of 0.3 microns or more.
It is sterilized with HEPA filters 1a and 1b which collect 9.99% or more. Intake air A with an air volume corresponding to exhaust air B in the drawing
However, an average flow rate of 0.
An air barrier of 55 m / s or more is formed to prevent dust containing pathogens generated in the cabinet room from flowing out of the device. The circulating air flow is supplied as a downward uniform air flow from above the workbench, and prevents external germs from mixing into the cabinet room. In addition, Japanese Patent Laid-Open No. 1-2883
As shown in FIG. 14, Japanese Patent Laid-Open No. 42-42 discloses a device for preventing alternate contamination by a double air barrier composed of a first door 3a, a second door 3b, and a third door 3c on the front of the animal breeding unit. There is.

[0003]

In the above-mentioned prior art, there is a possibility that contaminants may move between an animal and other animals during storage or breeding of the animal. Further, in the case where a double air barrier is provided in front of the animal breeding unit in order to prevent the scattering of pollutants, one of the air blower and the purifier of the working space and the animal breeding space is independent. Or, since both the means are independent of each other, the structure is complicated and the cost is increased.

In view of the above problems, it is an object of the present invention to provide an animal breeding apparatus which has a simple structure and prevents scattering of contaminants and alternate contamination between animals, and which is suitable for saving the installation space. ..

[0005]

The above object is provided with a plurality of stages of breeding shelves vertically arranged in a cabinet, an air flow forming means for forming an air flow in the cabinet, and a cleaning means for the air flow. In the animal breeding apparatus, an exhaust means for discharging at least a part of the outside air introduced into the cabinet to the outside of the cabinet, a partition plate provided in a direction perpendicular to the planes of the plurality of breeding shelves, or an airflow to each of the breeding shelves. The present invention is achieved by an animal breeding apparatus, characterized in that at least one of the current plates provided in the introduction portion is provided, and the airflow is divided into each space on the breeding shelves having a plurality of stages.

[0006]

With the above-described structure, the clean airflow is guided in one direction by the partition plate or the straightening plate in the space on each breeding shelf and passes through in the same direction, so that the working space is kept clean. In addition, cross contamination between breeding animals is prevented.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are views showing a first embodiment of the present invention, in which a circulation HEPA filter 1 is used by a circulation fan 2a.
The clean airflow supplied via a passes through the air passage 12 formed between the back plate 11 of the cabinet 100 and upward while being mixed with the airflow introduced from the outside through the inflow opening slit portion 7. Will be led. Here, part of the air flow is exhausted by the exhaust fan 2b to the exhaust HEPA filter 1
The other part is exhausted from b and the circulation is repeated again. The first embodiment has a configuration in which a part of the air flow in the cabinet is circulated and a part of the air flow is exhausted, and the "air flow forming means for forming an air flow in the cabinet" and the "introduction" according to claim 1. The “exhaust means for discharging at least a part of the outside air to the outside of the cabinet” includes, for example, a configuration including the circulation fan 2a, the exhaust fan 2b, and the air passage 12 of the present embodiment,
“Purification means for purifying the airflow” refers to the HEPA filters 1a and 1b of the embodiment.

The circulating airflow passes through the HEPA filter 1a, becomes a clean airflow, and further passes through the current plate 4a to be rectified. This airflow flows toward the inflow opening slit portion 7 while forming a downward airflow in the space surrounded by the front door 3, the back plate 11 and the side plate (not shown). The space is composed of a working space 5 and a breeding space 6, and the airflow flowing through the breeding space 6 is rectified by a rectifying plate 4b and a partition plate 10 provided at the introduction portion to the breeding shelves 8 at each stage. Divide each shelf. This airflow passes around the animal storage cage 9 in the breeding section of each shelf, is mixed with the airflow on the working space 5 side at the front of each breeding shelf 8, and flows into the inflow opening slit section 7. Here, the clean airflow forms an independent unidirectional airflow from the rear surface to the front surface of each breeding shelf 8. As described above, by dividing the clean airflow for each breeding shelf 8 on the upstream side, it is not necessary to provide a dedicated air blowing means or purifying means for each breeding space 6, and cross contamination between breeding compartments is prevented. It The position of the air passage 12 may be arranged on the side surface of the breeding shelf 8 instead of the back surface.

FIG. 2 is a diagram showing the results of a CAE simulation of airflow in the breeding space 6 in which the present invention is applied to the upper breeding shelf 8a and the lower breeding shelf 8c has the conventional structure. As shown in the drawing, a smooth air flow is formed in the space to which the present invention is applied, but the air flow is clearly stagnant in the lower stage where the conventional structure remains.

A second embodiment of the present invention is shown in FIG. In this embodiment, a hinge 2 is provided on the front part of the upper and middle feeding shelves 8a and 8b.
By installing the shield plate 22 through 1, thereby reducing the passage area of the ventilation airflow from the middle and lower shelves to increase the passing wind speed, and by the so-called air barrier effect, prevent cross contamination between breeding compartments Is.

A third embodiment of the present invention is shown in FIG. In this embodiment, the airflow is guided from the rear chamber 32 to the breeding space 6 via the straightening plate 31. The wind pressure in the rear chamber 32 is slightly positive with respect to the rearing space 6, and the airflow is from the rear chamber 32 to each rearing space 6.
Cross-contamination is prevented by passing through and introducing into the working space 5. In the figure, the (+) symbol indicates positive pressure, and the (-) symbol indicates negative pressure.

A fourth embodiment of the present invention is shown in FIGS.
In this embodiment, the wheels 42 installed on the bottom of the breeding rack 8 roll on the rails 41 so that each breeding rack 8 can be moved in the front-back direction when the animal storage cage 9 is in and out and at the time of breeding. Is. That is, when the animal storage cage 9 is moved in and out, the breeding rack 8 is moved to the rear side of the work space 5, a large space is secured on the front side of the breeding rack 8, and the movement of the animal breeding cage 9 is facilitated. At the time of breeding, the breeding rack 8 is pulled out to the position where it abuts on the stopper 43, which allows breeding in a state suitable for preventing cross-contamination between animals as in the first embodiment. The means capable of moving parallel to the direction of the back plate of the cabinet according to the second aspect refers to, for example, the rail 41, the wheel 42, and the stopper 43 of the fourth embodiment.

A fifth embodiment of the present invention is shown in FIGS.
In the present embodiment, the breeding space 6 is partitioned by the breeding shelves 8 in the width direction by the partition plates 51 arranged side by side in the width direction so that the breeding spaces 6 are independent from each other. , To the breeding space 6a directly, to the breeding space 6b 1
2 through the opening 52b to the breeding space 6c opening 52c
A clean air stream is introduced from. In this embodiment, since only one row of air passages 12 is provided on the back of the breeding space 6, the work space 5 can be widely secured. The "partition plate provided in the same number as the number of the breeding shelves in the direction perpendicular to the back plate" in claim 3 refers to the partition plate 51 of the fifth embodiment, for example.

A sixth embodiment of the present invention is shown in FIG. In this embodiment, a current plate 4b is arranged at the bottom of each breeding rack 8 so as to guide an independent clean airflow, and the airflow passing through the space above the breeding rack 8 is mixed at the front of the breeding rack 8. For example, the airflow diverted to the lower part of the breeding shelf 8b causes the breeding shelf 8a and the breeding shelf 8c to
It provides an air barrier effect to the airflow entering into and prevents cross-contamination between reared animals.

A seventh embodiment of the present invention is shown in FIG. Figure 1
In the embodiment shown in FIG. 10, a part of the air flow in the cabinet 100 is circulated and a part of the air flow is evacuated, but in the embodiment shown in FIG. 10, the air in the cabinet 100 is not circulated and all fresh air ( 1 shows an embodiment having an air supply means by (all fresh air). That is, fresh air C is introduced from the outside of the cabinet 100 through the air supply port 13, clean air is supplied to the working space 5 and the breeding space 6 through the air supply HEPA filter 1a, and this air and inflow as an air barrier. The airflow A joins at the inflow opening slit portion 7, and the total amount of these air is purified by the exhaust HEPA filter 1b through the air passage 12 and then as the exhaust B.
It is guided to a duct provided in a building (not shown) and discharged outside.

In the seventh embodiment, the air flow is cabinet 100.
The whole amount is discharged so as not to circulate the inside repeatedly, and is included in the "exhaust means for discharging at least a part of the introduced outside air to the outside of the cabinet".

According to the present embodiment, since the air in the breeding apparatus does not circulate, odors that cannot be removed by the exhaust HEPA filter and recirculation of gaseous substances generated during experimental work are prevented. It is possible to provide a comfortable space environment for domestic animals.

An eighth embodiment of the present invention is shown in FIG. 11 (front sectional view) and FIG. 12 (side sectional view). In the embodiment shown in FIG. 1, the air passage 12 is arranged on the back surface of the cabinet 100, but in this embodiment, as shown in FIG.
2 is arranged on at least one of the left and right sides of the cabinet 100, which is suitable when it is desired to secure a sufficient space for the working space 5 or the breeding space 6 in the depth direction.

[0019]

As a result of the practice of the present invention, a clean airflow is introduced independently for each breeding rack to maintain the cleanliness of the work space and prevent scattering of contaminants and cross contamination between breeding animals on each breeding rack. It is possible to provide an animal breeding device that can be prevented and save the installation space, and there is a great effect.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a first embodiment of an animal breeding device according to the present invention.

FIG. 2 is an airflow simulation diagram by CAE according to the first embodiment of the present invention.

FIG. 3 is a side sectional view showing a second embodiment of the present invention.

FIG. 4 is a side sectional view showing a third embodiment of the present invention.

FIG. 5 is a side sectional view showing a fourth embodiment of the present invention.

FIG. 6 is a diagram showing a movement state of shelves when the cage is in and out according to the fourth embodiment of the present invention.

FIG. 7 is a perspective view showing a fifth embodiment of the present invention.

FIG. 8 is a side sectional view of a fifth embodiment of the present invention.

FIG. 9 is a side sectional view showing a sixth embodiment of the present invention.

FIG. 10 is a side sectional view showing a seventh embodiment of the present invention.

FIG. 11 is a front sectional view showing an eighth embodiment of the present invention.

FIG. 12 is a side sectional view showing an eighth embodiment of the present invention.

FIG. 13 is a side sectional view of the prior art.

FIG. 14 is a side sectional view of another prior art.

[Explanation of symbols]

 A Inflow air B Exhaust air C Air supply 1a, 1b HEPA filter 2a Circulation fan 2b Exhaust fan 2c Air supply fan 3 Front door 4, 4a, 4b Rectifying plate 5 Working space 6, 6a, 6b, 6c Breeding space 7 Inflow opening slit part 8, 8a, 8b, 8c Breeding rack 9 Animal storage cage 10 Partition plate 11 Rear plate 12 Airway 13 Air supply port 21 Hinge 22 Blocking plate 31 Rectifier plate 32 Rear chamber 41 Rail 42 Wheel 43 Stopper 51 Partition plate 52b, 52c Opening 100 cabinets

Front page continuation (72) Inventor Shoichi Yoshida 46-1 Tomioka, Nakajo-machi, Kitakanbara-gun, Niigata Prefecture Nakajo Factory, Hitachi Ltd. (72) Inventor Shinji Iwada 1-23, Kandasuda-cho, Chiyoda-ku, Tokyo No. 2 within Hitachi Cold Energy Co., Ltd. (72) Inventor Kei Kitamura 4-10-2 Narimasu, Itabashi-ku, Tokyo (72) Inventor Toshihiko Komatsu 1909-2 Shimosakuen, Takatsu-ku, Kawasaki-shi, Kanagawa

Claims (3)

[Claims] 1. An animal breeding apparatus equipped with a plurality of stages of breeding shelves vertically arranged in a cabinet, an airflow forming means for forming an airflow in the cabinet, and a purification means for the airstream, the animal breeding apparatus being introduced into the cabinet. Exhaust means for discharging at least a part of the outside air to the outside of the cabinet, a partition plate provided in the direction orthogonal to the plurality of breeding shelf planes, or a rectifying plate provided in the airflow introducing portion to each breeding shelf, An animal breeding apparatus comprising at least one of the above and configured so that the airflow is divided into each space on the plurality of stages of breeding shelves. 2. The animal breeding apparatus according to claim 1, wherein the partition plate has means that can be moved in parallel to a back plate provided on the back surface of the cabinet. 3. The animal breeding apparatus according to claim 1, wherein the partition plates are provided in the same number as the breeding shelves in a direction perpendicular to the back plate.