JPH01207661A - Animal experiment equipment - Google Patents

Abstract

PURPOSE:To obtain accurate data by partitioning a housing with partition shelves into plural chambers, fitting lighting equipments which can be dimmed freely to the respective chambers, and providing a straightening plate which controls a flow of air from an air blowing fan at the upper part in the housing. CONSTITUTION:The plural chambers 9 are formed in the housing 1 with partition shelves 8 and the lighting equipments which are freely adjustable in illuminance are installed at the upper parts of the respective chambers 9. Further, an air blowing fan chamber 10 is formed at the upper part of the housing, the air blowing fan 11 is installed, and the straightening plate 12 is provided below the fan 11. Then while cages which contain small animals are placed on the partition shelves 8, a cooling or heating machine and the fan 11 are put in operation and then cool or warn air flows through the gap between the housing 1 and straightening plate 12 after passing through an air blow opening 13. Then the air flows down by striking on a side wall part 3a and part of the air flows in the respective chambers 9 and moves up along the other side wall parts 3b to flow in the air intake side of the fan 1. Thus, the respective chambers 9 are cooled or heated to nearly equal temperature, so that the accurate data is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an animal experiment device for subjecting small animals such as mice, rats, or guinea pigs to environmental changes by at least one of light and temperature.

(Prior art) For example, small animals can be exposed to
Experiments have been conducted in which stress is applied by changing the environmental temperature over time, and the following devices are generally used to apply stress.

In other words, a casing with a door on the front is divided into upper and lower parts with slatted shelves to form multiple rooms, and a fluorescent light is installed on the top or on the side wall of the casing above each door, and a blower fan is installed on the top. The temperature inside the housing was changed using at least one of a cooling device and a heating device. Small animals are placed in wire mesh or plastic cages and placed on slatted shelves.

(Problem to be solved by the invention) In such a device that applies stress to small animals, placing all the small animals housed in the housing in the same environment increases the reliability of various experiments using the animals. This is particularly important in the above example, as in the conventional example mentioned above, fluorescent lights are only provided on the top surface or on the side wall of the case above each door.
The lower chamber had the disadvantage that it was darker than the upper chamber because it was farther from the light source and the light was blocked by the cage placed on the upper shelf.

In addition, the air blown from the fan passes through the cooler or warmer and is then diffused, so cold or warm wind with high speed flows into the cage near the cooler or warmer, cooling the cage. There was a disadvantage that conditions were different for cages located far from the heater or heater.

In addition, the lights (fluorescent lights) were either on or off.

Therefore, if there is a cage 't-it< in each chamber of a right circle, and if there is a cage 'f: r
The intensity of light hitting the cage (illuminance) when it is not on
There were different problems. (Because it is a slatted shelf, light passes through it, and the degree of light received from fluorescent lights placed in other rooms is different.) The present invention was made to solve the above problems, The purpose of the present invention is to obtain an animal experiment device that can make the environmental conditions of small animals the same.

(Means for solving problems) The present invention consists of the following configuration to achieve the above object.

A plurality of chambers are formed by partitioning the housing into upper and lower sections by partition shelves, each chamber is provided with a dimmable lighting fixture, and at least one of a hot air vent or a cold air vent and a blower fan are provided in the upper part of the housing. An animal experiment device characterized by being provided with a rectifier plate that regulates the flow of blown heated air or cooled air.

(Function) In the animal experiment apparatus of the present invention, regardless of which chamber the cage containing the small animal is placed, lighting equipment is provided in each chamber, so the brightness for each cage is almost uniform. .

In addition, by controlling the flow of the air blown out by the blower fan, the installed rectifying plate allows the speed and volume of the air flowing to each cage to be more or less uniform.

Furthermore, since the lighting equipment is dimmable, it is possible to adjust the intensity of light hitting each cage to be constant regardless of where the cages are placed or the number of cages.

(Effects of the Invention) With the animal experiment apparatus of the present invention, the environmental conditions t for small animals can be made almost the same until the brightness, wind speed, and air volume for each cage containing a small animal become almost uniform as described above, and therefore, stress-adding experiments can be performed. More accurate data can be obtained in various experiments using stressed animals.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1 In FIGS. 1 to 3, reference numeral 1 indicates a housing, and the housing 1 has a rear wall portion 2 and a side wall portion 5a.

sb, upper rock section 4 and bottom wall section 5-I! ! - The front opening 6 is provided with a plurality of glasses s7 that can be opened and closed. The door is double glazed and equipped with an anti-condensation heater to prevent fogging.

The interior of the housing 1 is vertically partitioned by a mesh partition shelf 8 to form a plurality of chambers 9. A lighting fixture 10 consisting of a fluorescent lamp with a dimming device whose illuminance can be adjusted is installed on the upper rear wall of each chamber 9.

One end of the upper part of the housing 1 protrudes upward to form a blower fan chamber 10, and the blower fan 1 is installed in the chamber 10.
1 is installed. The air blower is blowing. This baffle plate 12
consists of a vertical part 12a and a horizontal part 12b, and the vertical part 12
912b is parallel to the top surface of the housing 10.

14 is a blower fan cover, and the vertical part 12a of 12
The distal end thereof and the other side surface 10b of the fan chamber 10 protrude horizontally from the horizontal direction and in the opposite direction to the horizontal portion 12b.
An inlet port 15 is formed in the inlet. Reference numeral 16 denotes a temperature sensor, which is provided in each t'J chamber 9. The sensor 16 is movable so that it can measure the temperature at any location in each room 9. Reference numeral 17 denotes a ventilation section for taking outside air into the housing 1, which is composed of a ventilation hole provided in the side wall 3.3 of the housing 1, and a ventilation door that can open and close the ventilation hole.

Note that the partition shelf 8 is made of steel wire coated with resin. In addition, a cooler for cooling and a warmer for heating (not shown) are arranged in the ventilation fan chamber 10, and the housing l has stainless steel plates on the inside and outside, and a heat insulating material made of hard polyurethane foam provided between the steel plates. formed by In addition, the cooling machine or heating machine is installed outside of the fan room 1, and these are connected to the ventilation fan room 1 through a duct.
May be connected to 0.

Next, the operation of the device having the above configuration will be described. When the cooler or warmer and the air blower 77/11 are operated with a cage (not shown) containing a small animal placed on the partition shelf 8, the cold air or warm air passes through the air outlet 13 and flows into the housing 1.
Proceed through the gap between the inner surface of the
The wind changes its direction downward and flows down along the side wall 13, but during this time, a portion of the wind flows into each chamber 9 as shown by the arrow and advances toward the other side wall 5b, and then flows down the side wall 13. 3b, changes direction upward, rises along the same side wall 3b, and flows into the intake port side of the blower fan 11. The hot air blown out from the blower fan 11 in this way is transferred to the earthen wall portion 4 of the housing 1 . The flow along the side wall 3a, the bottom wall 5, and the side wall 3b and the flow passing through each test chamber 9 lower or increase the temperature of each chamber 9 to approximately the same temperature.

If the temperature sensor 16 detects that the temperature inside the housing has reached the set temperature, the thermostat will work and the cooler or heat absorber will stop operating, and the temperature will deviate from the set temperature due to temperature rise or fall. If so, it will work again.

Embodiment 2 In FIG. 4, in place of the baffle plate 12 in the device of Embodiment 1, a rectifying plate 12' is arranged parallel to the side walls 3a, 3b of the housing 1 over almost the entire surface.

Further, in this embodiment, the blower fan 11 is
Each fan is installed in a blower fan chamber 10 formed to protrude upward from both ends of the upper part of the fan.

Further, a temperature sensor 16 is installed at the intake port 15 of each of the two blower fans.

Note that the current plate 12' is formed of a wire mesh, a steel plate having holes, or the like.

The flow of wind when the device according to this configuration is operated is shown by arrows as in the first embodiment. That is, the air blown out by the blower fan 11 and passed through the air outlet 15 is directed downward parallel to the side walls 5a, 3b of the housing 1 by the rectifying plate 12', and a part of the air is flowing downward through the rectifying plate 12'. The air flows into each chamber 9 with uniform speed and volume. The wind flowing into each chamber 9 rises and flows toward the intake port 16. Therefore, animals placed in any room are exposed to a uniform temperature environment under almost the same wind speed and volume.

In an experiment to induce stress in small animals, for example, a high temperature atmosphere and a low temperature atmosphere are alternately created every hour between 10 a.m. and 5 p.m. This temperature setting varies depending on the test animal, but is usually set within a range of -5°C to 40°C. - For example, high@A is set at 24℃, low@ is set at Vi4℃ for mice, -3℃ for rats, and 0℃ for guinea pigs.
There are cases where it is set to . It is also possible to change the illuminance simultaneously with this temperature setting.

This illuminance is normally set within the range of 0 to 10,000 lux.

[Brief explanation of the drawing]

FIG. 1 is a front view of the inside of an embodiment of the device according to the present invention, FIG. 2 is a front view showing the external appearance of the device, and FIG.
FIG. 4 is a side sectional view of the figure, and FIG. 4 is a front view of the inside of another embodiment. 1... Housing 8... Partition shelf 9... Chamber 12... Baffle plate 12'... Rectifier plate 15...
・Air outlet patent applicant Nippon Zoki Seiyaku Co., Ltd. Figure 1 1 ・Housing Sog 8 ・ Ishikiri Tana 9 ・1 12... Gosuzaka 13 ・ Air outlet Figure 3 Figure 2 Figure 4

Claims (1)

[Claims] (1) A plurality of chambers are formed by dividing the housing into upper and lower sections by partition shelves, each chamber is provided with a dimmable lighting fixture, and at least one of a hot air vent or a cold air vent and a blower fan are provided in the upper part of the housing. What is claimed is: 1. An animal experiment device characterized by being provided with a rectifying plate that regulates the flow of heated air or cooling air that is blown out.