JP2015211662A - Small animal breeding device and shield frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small animal breeding device and a shield frame, enabling suppression of scattering of excrement of a small animal or a floor bedding material from a breeding cage and suppression of the breeding environment contamination, and allowing for reduction of labor and expenses for disinfection and cleaning work of the excrement of the small animal or the floor bedding material scattered from the breeding cage.SOLUTION: The shield frame includes: a shield frame 6 for shielding a breeding cage for breeding a small animal; and an air outlet 8 exhausting atmosphere in a space formed by a breeding cage 2 surrounded by the shield frame 6. The small animal breeding device includes: a breeding cage 2 breeding the small animal; a breeding rack 4 including a shelf board 10 for placing the breeding cage 2 thereon; and an attachable/detachable shield frame 6 for shielding the breeding cage 2 placed on the shelf board 10. The shield frame 6 includes the air outlet 8 for exhausting atmosphere formed by the shield frame 6 and the breeding cage 2 surrounded by the shield frame 6.

Description

  The present invention relates to a small animal breeding apparatus and a shielding frame, and more particularly to a structure for preventing mutual infection of small animals raised by the small animal breeding apparatus and a shielding frame used for preventing this mutual contamination.

  Conventionally, a breeding rack for placing a plurality of small animals on a shelf is used for breeding small animals such as rats, mice, and guinea pigs.

  Usually, a breeding rack is provided with a plurality of shelf boards, and a plurality of cages are arranged on each shelf board. The breeding rack is installed in the breeding room, and the cage is usually made in a box-type non-airtight type whose interior is exposed to the atmosphere in the breeding room.

  In such breeding by a breeding rack, there is a problem that small animals in other cages are infected with pathogenic bacteria possessed by small animals in a certain cage.

  Wooden and paper flooring materials are laid in the cages that house small animals. Small animals have the habit of pushing their dirty floor coverings and feces out of the cage during breeding. The extruded flooring material is scattered around the cage by the air current in the breeding room, the breeding environment is polluted, and small animals may become infected with opportunistic bacteria.

  When the breeding environment is contaminated, cross-infection occurs between small animals, and it is necessary to examine individually whether or not the genes of the small animals being studied are contaminated. In that case, monitoring of small animals, for example, monitoring work only to determine whether small animals in a specific cage are contaminated in the breeding environment is also required.

  In addition, millions of small animals are bred for experiments for various studies including IPS cells and STAP cells. The experimental results are important and we are not interested in contamination of the small animal breeding environment.

  At present, the prevention of contamination of the breeding environment in the breeding rack is performed by disinfecting and cleaning small animal feces and floor coverings scattered in the breeding rack. However, this requires a great deal of labor and expense. Yes.

  By the way, conventionally, as a countermeasure against contamination of the breeding environment in such a breeding rack, the atmosphere in each cage of the breeding rack is independently discharged to the outside.

  The rack for raising small animals disclosed in Japanese Patent Laid-Open No. 63-94930 (Patent Document 1) has an exhaust chamber on the back side thereof. The exhaust chamber and the rack cage are disposed in close contact via a back plate having a vent hole. Accordingly, the air in the cage is sucked into the exhaust chamber through the vent hole of the back plate, and is discharged from the exhaust chamber to the outside of the animal breeding room through the exhaust duct.

  In the animal breeding rack disclosed in JP-A-8-228623 (Patent Document 2), the air exhaust passage is located above the cage, and the air in the cage is exhausted from the exhaust passage to the outside of the rack.

JP-A-63-94930 JP-A-8-228623

  However, even in the racks of Patent Documents 1 and 2, small animal feces and floor coverings are scattered around the cage, and the breeding environment is contaminated. In addition, a lot of labor is required for the cleaning work on the portion of the rack where the droppings or floor covering material adheres.

  The present invention has been made to solve the above problems, and by covering the cage in the breeding rack with a detachable shielding frame, it is possible to suppress scattering of feces and floor covering material from the cage, and the breeding environment. In addition, the cage is covered with a shielding frame to prevent the droppings and flooring material from adhering to the rack shelf and the inner wall. An object of the present invention is to provide a small animal breeding apparatus capable of reducing labor and cost, and a shielding frame covering a breeding cage.

  In order to solve the above problems, the present invention is characterized by the following.

  The shielding frame of the present invention is a shielding frame for shielding a breeding cage for breeding small animals, and is a space formed by the shielding frame, the breeding cage covered with the shielding frame, and the shielding frame. An exhaust port for exhausting the atmosphere is provided, whereby the above object is achieved.

  In a preferred embodiment, the shielding frame has an outlet for taking out the breeding cage from the shielding frame on one side of the shielding frame, and the outlet is covered with the shielding frame. It is located on the other side of the shielding frame, which is located on the opposite side of the exhaust port with respect to the cage.

  In a further preferred embodiment, the shielding frame is made of a disposable material.

  In a more preferred embodiment, the shielding frame includes an upper surface portion covering the upper side of the breeding cage, a side surface portion covering the side surface of the breeding cage, a bottom surface portion covering the bottom surface of the breeding cage, and a rear surface of the breeding cage. And a back portion for covering.

  In a further preferred embodiment, the shielding frame is a wind direction plate that directs the flow of air flowing through a space formed by the shielding frame, the breeding cage covered with the shielding frame, and the shielding frame into the breeding cage. Have

  A small animal breeding apparatus according to the present invention includes a breeding cage for breeding small animals, a breeding rack having a shelf for placing the breeding cage, and a detachable shield for shielding the breeding cage placed on the shelf. A shielding frame, and the shielding frame has an exhaust port for discharging an atmosphere of a space formed by the shielding frame, the breeding cage covered with the shielding frame, and the shielding frame.

  In a preferred embodiment, the shielding frame has an outlet for taking out the breeding cage from the shielding frame on one side of the shielding frame, and the outlet is covered with the shielding plate. Located on the opposite side of the exhaust port to the cage.

  In a further preferred embodiment, the shielding frame is made of a disposable material.

  In a more preferred embodiment, the shielding frame includes an upper surface portion covering the upper side of the breeding cage, a side surface portion covering the side surface of the breeding cage, a bottom surface portion covering the bottom surface of the breeding cage, and a rear surface of the breeding cage. And a back portion for covering.

  In a further preferred embodiment, the shielding frame is a wind direction plate for directing an air flow flowing through a space formed by the shielding frame, the breeding cage covered with the shielding frame, and the shielding frame toward the breeding cage. Have

  According to the present invention, the exhaust frame for discharging the atmosphere in the cage is formed in the shielding frame covering the cage, so that the atmosphere in the cage can be discharged so as not to spread to other cages or breeding rooms. it can. Moreover, it is possible to prevent small animal feces and floor coverings from being scattered from a wide range by individual shielding frames. As a result, the breeding environment in the breeding rack including the cage can be kept more clean, and contamination of the breeding environment can be reduced. As a result, contamination from other small animals in the rack can be suppressed.

  According to the present invention, by covering the cage with the shielding frame, the small animal feces and floor coverings scattered from the cage do not spread outside the shielding frame. It will almost never adhere to. Therefore, labor and cost required for disinfection and cleaning of small animal feces and floor coverings scattered in the rack are remarkably reduced.

  According to the present invention, the cage is covered with the shielding frame to prevent contamination of the breeding environment in the breeding rack, disinfect the feces and floor covering, and reduce the cleaning work. There is no need to change the structure. Therefore, the cost for changing the configuration of the small animal breeding apparatus can be kept low.

FIG. 1 is a schematic front view for explaining a small animal breeding apparatus according to Embodiment 1 of the present invention, and shows an overall configuration of the small animal breeding apparatus. FIG. 2 is an enlarged front view showing a main part of the small animal breeding apparatus shown in FIG. FIG. 3 is an enlarged cross-sectional view showing a main part of the small animal breeding apparatus shown in FIG. 4A is a perspective view showing a shielding frame used in the small animal breeding apparatus shown in FIG. 1, and FIG. 4B is a perspective view showing a modification of the shielding frame shown in FIG. 4A. FIG. 5 is a diagram for explaining the first embodiment of the present invention, and is a perspective view showing a state in which the breeding cage is covered with the shielding frame of the first embodiment shown in FIG. 6A and 6B are diagrams for explaining a shielding frame used in the small animal breeding apparatus according to Embodiment 2 of the present invention. FIG. 6A is a longitudinal sectional view parallel to the longitudinal direction of the breeding cage, and FIG. It is a longitudinal cross-sectional view perpendicular to the longitudinal direction of the breeding cage. FIG. 7 is a perspective view from the front side for explaining a small animal breeding apparatus according to Embodiment 3 of the present invention, and shows a state where a shielding frame is arranged in the breeding rack. FIG. 8 is a perspective view from the back side of the small animal breeding apparatus shown in FIG. FIG. 9 is a side sectional view for explaining a small animal breeding apparatus according to Embodiment 3 of the present invention, and shows a state where a breeding cage is covered with a shielding frame. FIG. 10 illustrates a paper shielding frame according to the third embodiment of the present invention. FIG. 10 (a), FIG. 10 (b), FIG. 10 (c), FIG. 10 (d), and FIG. ) And FIG. 10 (f) are a perspective view of the shielding frame, a plan view of the shielding frame, a schematic sectional view of the shielding frame, a plan view of the wall body, a perspective view from the inside of the main part of the shielding frame, and a shielding frame, respectively. It is sectional drawing of the principal part. FIG. 11: is a longitudinal cross-sectional view which shows the principal part of the small animal breeding apparatus by Embodiment 4 of this invention. FIG. 12 is a perspective view showing a small animal breeding apparatus according to Embodiment 5 of the present invention. 13 is a perspective view of a shelf board used in the small animal breeding apparatus of FIG. FIG. 14 is a diagram for explaining a shielding frame used in the small animal breeding apparatus according to Embodiment 5 of the present invention. FIGS. 14 (a) and 14 (b) are a perspective view and a shielding from the rear side of the shielding frame, respectively. It is a schematic sectional drawing of a frame. FIG. 15 is a view for explaining a cylinder constituting the shielding frame of FIG. 14, and FIG. 15A and FIG. 15B are a perspective view and a schematic sectional view of the cylinder, respectively. FIG. 16 is a diagram for explaining a paperboard for producing the cylindrical body of FIG. 15 (a). FIGS. 16 (a) and 16 (b) are a plan view of the paperboard and FIG. 16 (a), respectively. It is an enlarged plan view of the A section. FIG. 17 is a development view of the wall of the shielding frame of FIG. 18 is an explanatory diagram of a method of assembling the shielding frame of FIG. FIG. 19 is an explanatory diagram of a method for assembling the shielding frame of FIG. FIG. 20 is an explanatory diagram of a method for assembling the shielding frame of FIG. FIG. 21 is a perspective view of a main part of the shielding frame in FIG. FIG. 22 is a diagram for explaining a structure for connecting a shielding frame used in the small animal breeding apparatus according to Embodiment 6 of the present invention to the exhaust pipe. FIGS. 22 (a) and 22 (b) are exploded views of the connection structure, respectively. It is a perspective view and a schematic sectional view. FIG. 23 is a view for explaining a shielding frame used in the small animal breeding apparatus according to Embodiment 7 of the present invention. FIGS. 23 (a) and 23 (b) are a perspective view and a schematic sectional view of the shielding frame, respectively. .

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
1 to 3 show a first embodiment of the present invention.

As shown in FIG. 1, a small animal breeding apparatus 1 according to Embodiment 1 of the present invention includes a breeding cage (hereinafter simply referred to as a cage) 2 for breeding small animals such as rats, mice, and guinea pigs, and a cage 2. A breeding rack 4 having a shelf board 10 for mounting and a detachable shielding frame 6 for shielding the cage 2 are provided.
(Raising rack 4)
In the first embodiment, as shown in FIG. 1, the breeding rack 4 is attached such that a plurality of shelves are formed between the pair of left and right frames 40, 40 and the pair of left and right frames 40, 40. It has a plurality of shelf boards 10 and a top board 41 attached between the upper ends of the pair of left and right frame bodies 40, 40. On each shelf board 10, a cage arrangement space 42 for arranging a plurality of breeding cages 2 is formed. The cage 2 can be arranged on the shelf board 10 from the front side of the cage arrangement space 42 or taken out from the shelf board 10.
(Bred cage 2)
A conventional non-airtight type can be used for the breeding cage 2. For example, as shown in FIGS. 2 and 3, the breeding cage 2 is attached to a cage main body (hereinafter simply referred to as a main body) 20 having a box shape and having an upper surface opened, and an opening portion on the upper surface of the main body 20. An air permeable cage lid (hereinafter also simply referred to as a lid) 22. A housing space 24 for housing a small animal is formed inside the main body 20.

  The material of the main body 20 does not matter. The main body 20 can be formed of a transparent synthetic resin such as a polycarbonate resin or a polyester resin.

  The lid 22 is configured to be attached to an opening portion on the upper surface of the main body 20. The lid 22 may be of any material and shape as long as it ensures ventilation in the main body 20 and at the same time prevents the small animals housed in the main body 20 from escaping from the main body 20 to the outside. The lid 22 can be formed of, for example, a synthetic resin or metal net.

  A known water supply device 12 can be attached to the lid 22. The water supply apparatus 12 can include a water supply bottle made of, for example, a synthetic resin such as polyester, a glass bottle, or the like.

Furthermore, a known feeding device can be provided on the lid 22 or the main body 20 of the breeding cage 2. The feeding device may be arranged at any position on the lid 22 or may be installed in the main body 20. In this embodiment, a feeding device is provided on the lid 22 formed of a wire mesh.
(Suction panel 50)
In the first embodiment, as shown in FIG. 3, a suction panel 50 is provided on the rear side (right side in FIG. 3) of the rearing rack 4 opposite to the front side (left side in FIG. 3) where the cage 2 is inserted and removed. Has been placed. The suction panel 50 includes an inner surface plate 50a disposed on the back side of the breeding rack 4, and an outer surface plate 50b disposed on the opposite side of the breeding rack 4 with respect to the inner surface plate 50a. Here, a space 47 between the inner surface plate 50 a and the outer surface plate 50 b is connected to an exhaust fan (exhaust device) 46 through an exhaust pipe 55 shown in FIG. Become. This space 47 constitutes an exhaust chamber. The inner surface plate 50 a is configured by a punching board or the like in which a large number of punch holes are formed, and the punch holes function as air inflow holes 38 into the exhaust chamber 47.

When the exhaust fan 46 is driven to make the air pressure in the exhaust chamber 47 negative, an air flow that flows into the inflow hole 38 of the inner surface plate 50a is generated. Due to this air flow, the area between the exhaust port 8 of the shielding frame 6 and the suction panel 50 also becomes negative pressure. As a result, the atmosphere in the space formed by the cage 2 and the shielding frame 6 flows out of the shielding frame 6 from the exhaust port 8 through the filter 9 and is further sucked from the inflow hole 38 of the inner surface plate 50a of the suction panel 50. It flows into the panel 50 a and is discharged to the outside through the exhaust chamber 47.
(Shielding frame 6)
As shown in FIG. 4A, the shielding frame 6 is configured in a substantially box shape that can accommodate the cage 2, and an extraction port 15 that allows the cage 2 to be taken in and out is formed on the front surface thereof.

  Specifically, the shielding frame 6 covers a rectangular upper surface portion 30 that covers the upper surface of the cage 2, a pair of rectangular side surfaces 32 and 32 that cover a pair of side surfaces of the cage 2, and a rear surface of the cage 2. A rectangular rear surface portion 34 and a bottom surface portion 36 covering the entire bottom surface of the cage 2 are provided.

  In the first embodiment, the shielding frame 6 has the bottom surface portion 36 that covers the entire bottom surface of the cage 2, but the bottom surface portion 36 is not essential. As shown in FIG. 4B, the shielding frame 6 extends inward from the lower ends of the side surface portions 32, 32 and the back surface portion 34 by a predetermined dimension instead of the bottom surface portion 36 covering the entire bottom surface of the cage 2. You may have the extended strip | belt-shaped bottom face part 36a.

  The shielding frame 6 can be formed of paperboard, cardboard, plastic plate, thin metal plate, or the like, but may be formed of paper material such as disposable paperboard or cardboard.

  Although the position and the number of the exhaust ports 8 of the shielding frame 6 are not limited, in the first embodiment, one exhaust port 8 is formed in the back surface portion 34 of the shielding frame 6. Moreover, environmental pollution can be further reduced by attaching a filter to the exhaust port 8.

  Next, an example of how to use the small animal breeding apparatus 1 of the first embodiment will be described.

  A small animal is placed in the main body 20 of the cage 2, and the main body 20 is covered with a lid 22. As shown in FIGS. 1 to 3 and 5, the cage 2 is shielded by the shielding frame 6 by arranging the cage 2 in the shielding frame 6.

  With the cage 2 placed in the shielding frame 6, the shielding frame 6 is placed on the shelf plate 10 of the breeding rack 4 so that the exhaust port 8 of the shielding frame 6 faces the suction panel 50. When the exhaust fan 46 is operated in this state, an air flow flowing into the inflow hole 38 of the inner plate 50a of the suction panel 50 is generated. When such an air flow occurs, the area between the inner plate 50a of the suction panel 50 and the shielding plate 6 becomes negative pressure, and the air in the shielding frame 6 flows from the front outlet 15 to the rear outlet 8. It flows toward. As a result, the air in the breeding room is drawn into the shielding frame 6 from the outlet 15 on the front side of the shielding frame 6, passes through the cage 2, and is discharged to the outside by the exhaust device 47 through the exhaust chamber 47.

  The effect of this Embodiment 1 is demonstrated.

  As shown in FIGS. 1 to 3, a plurality of cages 2 are arranged side by side on the shelf boards 10 of the breeding rack 4 in the horizontal direction. Each cage 2 is disposed in the shielding frame 6, and the upper surface, both side surfaces, the bottom surface, and the back surface of the cage 2 are covered with the upper surface portion 30, the side surface portion 32, the bottom surface portion 36, and the back surface portion 34, respectively. The front side of the cage 2 is not covered with the shielding frame 6.

  By arranging each of the plurality of cages 2 in the shielding frame 6 in this way, each cage 2 is covered with the shielding frame 6 except for the front side thereof.

  When the cage 2 is disposed in the shielding frame 6, an air flow passage 16 through which air can flow is formed between the cage 2 and the shielding frame 6, as shown in FIGS. 2 and 3.

  When the cage 2 is arranged in the shielding frame 6 in this way and the exhaust fan 46 is operated to make negative pressure in the exhaust chamber 47 of the suction panel 50, the shielding frame 6 is inserted into the inflow hole 38 of the inner surface plate 50 a of the suction panel 50. The air between the back portion 34 and the suction panel 50 is sucked. As a result, a negative pressure is generated between the back surface portion 34 of the shielding frame 6 and the suction panel 50, and the air in the shielding frame 6 passes through the exhaust port 8 and is discharged between the back surface portion 34 of the shielding frame 6 and the suction panel 50. Is done. In the shielding frame 6, an air flow is generated from the take-out port 15 on the front surface of the shielding frame 6 through the air flow passage 16 toward the exhaust port 8. For this reason, the air in the cage 2 does not diffuse outside the shielding frame 6.

  Even if the small animal sprinkles the flooring material in the cage 2, the flooring material does not diffuse to the outside of the shielding frame 6 because the scattering of the flooring material remains inside the shielding frame 6.

  Fresh air in the breeding room flows into the cage 2 from the front side of the cage 2 toward the rear. Therefore, the contaminated air in the cage 2 does not diffuse into the work chamber.

  When floor covering material or dust adheres to the shielding frame 6, the cage 2 may be taken out from the shielding frame 6 and the cage 2 may be placed in the new shielding frame 6. The used shielding frame 6 may be incinerated or discarded.

Thus, in Embodiment 1, the scattering of small animal feces and floor covering material from the breeding cage 2 can be suppressed by the shielding frame 6, and the small animal feces scattered from the breeding cage 2 while suppressing contamination of the breeding environment. And labor and costs for disinfecting and cleaning flooring materials can be reduced.
(Embodiment 2)
In the first embodiment, as shown in FIG. 3, the back surface of the upper surface portion 30 of the shielding frame 6 is a flat surface. However, as shown in FIGS. 6 (a) and 6 (b), the shielding frame 6 When the airflow direction plate 18 is provided on the back surface of the upper surface portion 30 so as to be positioned in the vicinity of the front end of the upper surface portion 30, the air flow formed between the upper surface of the cage 2 and the upper surface portion 30 of the shielding frame 6 is provided. The air flow through the path 16 can be directed to the inside of the cage 2. The wind direction plate 18 can be formed of the same material as the shielding frame 6, for example, paperboard, cardboard, a thin plastic plate, or the like. The attachment can be performed on the lower surface of the upper surface portion 30 of the shielding frame 6 with an adhesive tape or an adhesive.

  The wind direction plate 18 may be attached to the shielding frame 6 with a slight inclination so that the downstream side of the air flow in the air flow passage 16 is closer to the cage 2 side. The air flowing from the front to the rear of the shielding frame 6 can be guided to the cage 2 side by the wind direction plate 18 and sent into the cage 2 through the lid 22 formed of a metal mesh or the like. Thereby, ventilation of the air in the cage 2 can be improved.

In the first embodiment, the exhaust port 8 is formed in the back surface portion 34 of the shielding frame 6, but the exhaust port 8 may be formed in the upper surface portion 30 or the side surface portion 32 of the shielding frame 6.
(Embodiment 3)
A third embodiment is shown in FIGS.

  FIG. 7 is a front perspective view of the breeding rack 4a according to the third embodiment with the shielding frame 6a attached, and FIG. 8 is a rear perspective view of the breeding rack 4a.

  The small animal breeding apparatus 1a according to the third embodiment includes a breeding rack 4a and a shielding frame 6a in place of the breeding rack 4 and the shielding frame 6 according to the first embodiment, and other configurations are the same as those in the first embodiment. It is.

  Here, the breeding rack 4a is configured in a substantially box shape, and the shielding frame 6a is configured to be slid into and out of the breeding rack 4a. Here, the shielding frame 6a can be easily made of paper.

  The detailed configuration of the breeding rack 4a and the shielding frame 6a is as follows.

  As shown in FIGS. 7 and 9, the rack 4a has a rack body 56 configured in a substantially box shape so that the front side is open. A suction panel 51 is disposed on the back side of the rack body 56. As in the first embodiment, the suction panel 51 includes an inner surface plate 51a and an outer surface plate 51b. The inner surface plate 51 a constitutes the inner wall surface of the rack body 56. An exhaust chamber 47a is formed between the inner surface plate 51a and the outer surface plate 51b. A plurality of air inflow holes 38a are formed in the inner surface plate 51a. A vent hole 57 communicating with the exhaust chamber 47 a is formed in the upper surface wall 59 of the rack body 56.

  FIG. 10A shows a perspective view of the shielding frame 6a, and FIGS. 10B and 10C show a plan view and a schematic sectional view of the shielding frame 6a, respectively.

  Similarly to the first embodiment, the shielding frame 6a is configured in a box shape so that the cage 2 can be accommodated, and an extraction port 15a that allows the cage 2 to be taken in and out is formed on the front surface thereof.

  The shielding frame 6 a includes a rectangular upper surface portion 30 a that covers the upper surface of the cage 2, a pair of rectangular side surface portions 32 a and 32 a that cover a pair of side surfaces of the cage 2, and a rectangular rear surface portion that covers the rear surface of the cage 2. 34a and a bottom surface portion 36a having the same rectangular shape as the upper surface portion 30a so as to cover the entire bottom surface of the cage 2. The end portions on the back side of the top surface portion 30a, the side surface portion 32a, and the bottom surface portion 36a are extended to the back side from the attachment position of the back surface portion 34a. An exhaust port 8a is formed in the back surface portion 34a of the shielding frame 6a.

  As shown in FIG. 9, when the shielding frame 6a is mounted in the breeding rack 4a, the rear end of the shielding frame 6a abuts against the inner surface plate 51a of the suction panel 51. An air reservoir 60 is formed between 51a and 51a.

  Therefore, when the exhaust fan is operated, the air in the exhaust chamber 47a is sucked, so that the air in the shielding frame 6a is once sucked into the air reservoir 60 from the exhaust port 8a as shown by the arrow in FIG. Next, the air is discharged from the exhaust chamber 47a through the inflow holes 38a of the inner plate 51a of the suction panel 51.

  By providing the air reservoir 60 between the shielding frame 6a and the suction panel 51 in this way, the air in the air reservoir 60 is effective through the plurality of inflow holes 38a, 38a provided in the inner surface plate 51a of the suction panel 51. Can be discharged.

  Next, an example of a method for producing the shielding frame 6a of Embodiment 3 will be described.

  As shown in FIG. 10 (a), the shielding frame 6a includes a rectangular tubular cylinder 62, and a wall 63 that is attached to the inside of the cylindrical body 62 and constitutes the back surface 34a of the shielding frame 6a. . The cylindrical body 62 and the wall body 63 can be formed by cutting and bending a paper plate material, respectively.

  As shown in FIG. 10 (b), a pair of parallel cuts 64, 64 are provided at the corners of the end of the cylinder 62 at the end on the back side of the cylinder 62, and the pair of cuts 64, 64 The sandwiched portion is a square piece 65. By pushing the square piece 65 from the outside to the inside of the cylindrical body 62, the square piece 65 can be recessed so as to protrude to the inside of the cylindrical body 62 as shown in FIGS. 10 (e) and 10 (f).

  As shown in FIG. 10D, the wall 63 includes a rectangular central plate member 66 and strips 67 that extend outward from the four sides around the central plate member 66 so as to be bent. Connection pieces 68 are formed at both ends of each strip 67. A notch 69 is formed at the center of each connecting piece 68. The four strips 67 are folded in a direction perpendicular to the plane of the central plate member 66 and the connecting pieces 68, 68 of the strip 67 are joined to each other, whereby both notches 69, 69 of the pair of connecting pieces 68, 68 to be joined. Thus, the engagement hole 70 is formed.

  A method for attaching the wall body 63 to the cylindrical body 62 will be described below.

  As shown in FIG. 10 (c), with the strip 67 of the wall body 63 being folded, the wall body 63 is inserted into the inner end of the cylindrical body 62, and the engagement hole 70 of the wall body 63 is inserted. The position is adjusted to the position of the square piece 65 of the cylindrical body 62 (in this state, the square piece 65 is not pushed into the cylindrical body 62). Next, the square piece 65 is inserted into the engagement hole 70 of the wall body 63 by pressing the square piece 65 with a finger from the outside so as to protrude into the cylindrical body 62 (FIG. 10C). FIG. 10 (e) and FIG. 10 (f)). The wall 63 is fixed in the cylindrical body 62 by the square piece 65 being fitted into the engagement hole 70.

  Thus, by manufacturing the shielding frame 6a by combining the cylindrical body 62 and the wall body 63 configured as described above, the shielding frame 6a can be manufactured very easily and at low cost. Moreover, the cylindrical body 62 and the wall body 63 are separable, the cylindrical body 62 can be folded, and the wall body 63 can be unfolded as shown in FIG. It can be stored and transported in a state where the space is reduced by stacking. Further, the cylindrical body 62 and the wall body 63 are sterilized before use and / or before disposal after use. Even when these members are sterilized (for example, sterilization by electron beam irradiation), they are made flat. Since sterilization can be carried out in a small space sterilization apparatus, a large sterilization facility is unnecessary and the sterilization facility can be economical.

  Next, a method of attaching the wind direction plate 18a in the shielding frame 6 will be described.

As shown in FIGS. 10A to 10C, a pair of slits 71 are formed on both sides of the upper surface 30a of the shielding frame 6a so as to face each other. The wind direction plate 18a is disposed so as to be in contact with the lower surface of the upper surface portion 30a of the shielding frame 6a, and the pair of attachment pieces 19 extending from both ends of the wind direction plate 18a are inserted into the pair of slits 71, whereby the wind direction plate 18a. Can be attached to the lower surface side of the upper surface portion 30a of the shielding frame 6a.
(Embodiment 4)
FIG. 11 shows a fourth embodiment.

  The small animal breeding apparatus according to the fourth embodiment is the same as the small animal breeding apparatus according to the first embodiment except that an exhaust duct 53 is provided instead of the suction panel 50 shown in FIG. Here, the exhaust duct 53 is disposed on the rear side of the breeding rack 4 and is connected to the exhaust device 46 through the exhaust pipe 55 shown in FIG. A socket 8 b for connecting the exhaust port 8 to the air suction port 54 of the exhaust duct 53 is attached to the exhaust port 8 of the shielding frame 6. A filter 9 may be attached to the socket 8b. Other configurations of the fourth embodiment are the same as those of the first embodiment.

  Also in the small animal breeding apparatus of the fourth embodiment having such a configuration, the air in the exhaust duct 53 is sucked by driving the exhaust fan 46, so that the air in the shielding frame 6 is externally passed through the exhaust duct 53. To be discharged.

  Thereby, also in this Embodiment 4, like Embodiment 1, the shielding frame 6 can suppress the scattering of feces and floor coverings of small animals from the breeding cage 2, and while suppressing contamination of the breeding environment, Labor and costs for disinfection and cleaning of small animal feces and floor coverings scattered from the breeding cage 2 can be reduced.

  By the way, the experimental process using small animals not only requires rearing equipment such as rearing racks and rearing cages to achieve the intended purpose of the experiment, but also requires disposal after use of the rearing equipment. .

  For example, for the disposal of rearing equipment used for rearing small animals infected with extremely dangerous pathogenic bacteria, a method of reliably preventing secondary infection from the rearing equipment after use is used.

  When the breeding equipment is made of resin, a method of incinerating the breeding equipment is used to dispose of the breeding equipment. In this method, generation of dioxins at the time of incineration leads to air pollution. Moreover, for disposal of metal breeding equipment, a method of finely cutting and embedding in the ground is used, but this method requires labor and cost.

Therefore, in the fifth embodiment below, a small animal breeding apparatus is realized from the viewpoint of total ecology considering the above experimental process.
(Embodiment 5)
A fifth embodiment is shown in FIGS.

  As shown in FIG. 12, the small animal breeding apparatus 200 according to the fifth embodiment is a breeding rack having a breeding cage 2 for breeding small animals such as rats, mice, and guinea pigs, and a shelf board 210 for placing the cage 2. 104 and a detachable shielding frame 106 that shields the cage 2. The cage 2 of the fifth embodiment is the same as that of the first embodiment, and a suction panel 250 similar to the suction panel 50 of the first embodiment is arranged on the back side of the breeding rack 104 of the fifth embodiment. Yes. As in the first embodiment, the suction panel 250 has a large number of ventilation holes (not shown), and is connected to an exhaust device such as an exhaust fan via an exhaust duct.

  In the fifth embodiment, the breeding rack 104 is made of a paper member. The shielding frame 106 placed on the shelf 210 of the breeding rack 104 is also made of a paper member. In the fifth embodiment, the suction panel 250 and the exhaust duct for connecting the suction panel 250 to the exhaust device are the same as those in the first embodiment. However, the suction panel 250 and the exhaust duct may be made of paper members. Good.

  As shown in FIG. 12, the breeding rack 104 includes a plurality of support columns 73, a front upper frame member 74a installed between upper ends of a pair of left and right support columns 73 and 73, and a pair of support columns 73 and 73 on the front side. A front lower frame member 74b erected between the lower end portions, a pair of rear left and right columns 73, a rear upper frame member 75a erected between the upper ends of the pair, and a pair of rear left and right columns 73, A rear lower frame member (not shown) installed between the lower end portions of 73 and a plurality of horizontal rails 76 installed between a pair of front and rear columns 73 facing each other. An upper reinforcing member 77 is installed between the front upper frame 74a and the rear upper frame 75a.

  These struts 73, frame members 74a, 74b and 75a, reinforcing members 77 and crosspieces 76 are preferably made of a relatively rigid paper material.

  On the left and right horizontal rails 76, 76 of the rack 104, shelf boards 210 are installed. As shown in FIG. 13, the shelf board 210 includes a plate material 213, and a reinforcing flange 214 formed so as to protrude downward from the front end portion and the rear end portion of the plate material 213.

  Here, the shelf plate 210 is placed on the left and right horizontal rails 76 of the rack 104 because a space for the shield frame 106 to be taken in and out of the rear rack 104 from the front of the rear rack 104 is provided. This is to ensure it widely.

  Specifically, when a horizontal rail is bridged between the right and left columns 73 and a shelf board is placed on the horizontal rail, the shielding frame 106 is placed on the shelf of the breeding rack 104 by the height dimension of the horizontal rail. Less space for taking in and out. On the other hand, by placing the shelf plate 210 on the left and right horizontal rails 76 of the rack 104 as in the fifth embodiment, it is not necessary to provide a horizontal rail on the front surface of the rack 104, and the shelf plates 210 are arranged vertically. It is possible to avoid the space between the shelf boards 210 and 210 being narrowed by the cross rail.

  In the fifth embodiment, as shown in FIG. 12, the adjacent shielding frames 106 on the shelf plate 210 are arranged with a slight gap therebetween, but the adjacent shielding frames 106 are arranged in close contact with each other. Also good.

  Further, in the fifth embodiment, three shelf boards 210 are arranged in the breeding rack 104 so as to form a three-stage shelf, and four rows of shielding frames covering the cages 2 are arranged on each shelf board 210. However, the number of shelves 210 and the number of cages 2 are not limited. For example, the breeding rack 104 may have six shelves and the cage 2 may be arranged in six rows on the shelf 210.

Hereinafter, the structure of the shielding frame 106 made of paper will be described in detail. FIG. 14A is a perspective view seen from the back side of the shielding frame 106, and FIG. 14B is a longitudinal sectional view of the shielding frame 106. Show.

  As shown in FIGS. 14 (a) and 14 (b), the shielding frame 106 has a cylindrical body 100 and a wall body 107 as in the fourth embodiment, and is configured by combining these members. is there. The cylindrical body 100 includes a rectangular upper surface portion 130 that covers the upper surface of the cage 2, a pair of rectangular side surface portions 132 and 132 that cover a pair of side surfaces of the cage 2, and a bottom surface portion 136 that covers the bottom surface of the cage 2. Have The wall body 107 attached to the cylindrical body 100 forms a back surface portion 134 of the shielding frame 106 and covers the back surface of the cage 2. The other opening portion of the cylindrical body 100 serves as a take-out port 108 for taking the cage 2 in and out of the shielding frame 106. However, the shielding frame 106 of the fifth embodiment is different from that of the fourth embodiment in the structure in which the wall body 107 is attached to the cylindrical body 100, and the shielding frame 106 has a wall at one opening portion of the cylindrical body 100. By attaching the body 107 so that the airtightness between the cylindrical body 100 and the wall body 107 is higher, the body 107 is configured in a box shape so that the cage 2 can be accommodated.

  The cylinder 100 will be described in detail.

  A side surface attachment piece 82 is formed to extend outward from an end portion of the side surface portion 132 of the cylindrical body 100 at an end portion on the back side of the cylindrical body 100 (left side in FIG. 15A). An upper surface mounting piece 83 is formed so as to extend outward from the end portion of 130, and a bottom surface mounting piece 84 is formed so as to extend outward from the bottom surface portion 136 of the cylindrical body 100.

  Ear pieces 82a are formed so as to extend outward from the outer ends of the side surface mounting pieces 82, and slits 86 cut from the upper end side and the lower end side thereof are formed at the boundary portions between the side surface mounting pieces 82 and the ear pieces 82a, respectively. Is formed. Further, engaging protrusions 87 are formed on the upper edge and the lower edge of the side surface mounting piece 82, respectively.

  Ear pieces 83 a are formed so as to extend outward from the outer end of the upper surface mounting piece 83, and engaging recesses 88 are formed at both end edges of the upper surface mounting piece 83. Ear pieces 84 a are formed so as to extend outward from the outer ends of the bottom surface mounting pieces 84, and engaging recesses 89 are formed at both ends of the bottom surface mounting pieces 84.

  FIG. 16A and FIG. 16B are diagrams for explaining a paperboard for forming the cylindrical body 100.

  The cylindrical body 100 is formed by bending a paperboard 96 shown in FIG.

  The paperboard 96 has a rectangular shape. Four first fold lines 101 parallel to the short side are formed on the paperboard 96, and the second fold line 102 and the third fold line 103 parallel to the long side are formed along the side edges on the long side. The second broken line 102 is formed so as to be located inside the third broken line 103. Further, a notch 97 is formed so as to reach the side edge on the long side of the paperboard 96 from the intersection of the four first bent lines 101 and the second bent line 102 and beyond the third bent line 103.

  When the cylindrical body 100 is formed by the paperboard 96, the regions of the paperboard 96 surrounded by the cuts 97, the second fold line 102, and the third fold line 103 are respectively a side surface attachment piece 82, an upper surface attachment piece 83, And the bottom mounting piece 84. When the tubular body 100 is formed by the paperboard 96, the regions of the paperboard 96 surrounded by the notches 97, the third fold lines 103, and the side edges on the long side of the paperboard 96 are respectively the ear pieces of the side surface mounting pieces 82. 82a, the ear piece 82a of the top surface mounting piece 83, and the ear piece 82a of the bottom surface mounting piece 84.

  As shown in FIG. 16B, the cut 97 has two straight portions 97a and a refracting portion 97b between the two straight portions 97a. When the cylindrical body 100 is formed by the paperboard 96, the engagement protrusion 87 of the side surface mounting piece 82, the engaging recess 88 of the top surface mounting piece 83, and the bottom surface mounting piece 84 are engaged by the portion where the notch 97 of the paperboard 96 is formed. Joint recesses 89 are respectively formed.

  Further, the paperboard 96 is formed with a cut 98 that is orthogonal to the cut 97 along the third fold line 103. When the cylindrical body 100 is formed by the paperboard 96, the slits 86 of the side surface attachment pieces 82 are formed by the cuts 98. The slit 86 has a width corresponding to the thickness of the paperboard 96.

  As shown in FIG. 17, the wall body 107 includes a rectangular center plate 91 and four flaps 92 formed so as to extend outward from the four sides around the center plate 91. These four flaps 92 are formed so as to be bendable with respect to the central plate member 91, respectively. An exhaust port is formed in the central portion of the central plate member 91, and a filter 99 is attached to the exhaust port.

  Cutouts 93 are formed at both ends of each flap 92. By folding the four flaps 92 in a direction perpendicular to the plane of the central plate 91 and joining the ends of the flaps 92, the engagement holes 94 are formed by the notches 93, 93 of a pair of joined ends. (FIGS. 18 to 21).

  In addition, the paperboard 96 and the flat wall body 107 constituting the cylindrical body 100 are formed by punching a thin thin paper material.

  Hereinafter, a method of forming the shielding frame 106 by attaching the cylindrical body 100 from the paperboard 96 to the assembly wall body 107 to the cylindrical body 100 will be described.

  For example, the paperboard 96 is sterilized by electron beam irradiation in a state where a plurality of the paperboards 96 are overlapped, and then brought into a sterilized breeding room. The wall body 107 is also brought into a sterilized breeding room after being laminated in a plate-like state and sterilized by electron beam irradiation.

  First, the operator folds the first folding line 101 of the paperboard 96 inward to make a square frame, and joins the end portions of the frame with adhesive tape or the like to FIG. 15 (a). The shown cylinder 100 is completed.

  Next, the operator turns the four flaps 92 of the flat wall member 107 in a direction perpendicular to the plane of the central plate member 91 and joins the ends of the flaps 92 to join the three-dimensional wall member 107. Form.

  Subsequently, as shown in FIGS. 18 and 19, the operator turns the three-dimensional wall body 107 in a state in which the four flaps 92 are bent at right angles to the central plate member 91 to the end on the far side of the cylindrical body 100. Insert in the club.

  Next, as shown by an arrow in FIG. 19, the operator folds the side surface mounting piece 82 to the inside of the cylindrical body 100 so as to overlap the flap 92 of the wall body 107, and engages the side surface mounting piece 82. The part 87 is engaged with the engagement hole 94 of the wall 107 (FIG. 20).

  Next, as indicated by an arrow in FIG. 20, the operator folds the bottom surface mounting piece 84 to the inside of the cylindrical body 100, and the engaging recess 88 of the bottom surface mounting piece 84 is engaged with the engaging protrusion of the side surface mounting piece 82. 87 and the end of the ear piece 84a of the bottom surface mounting piece 84 is inserted into the slit 86 of the side surface mounting piece 82 (FIG. 21).

  Similarly, the operator folds the upper surface mounting piece 83 inward of the cylindrical body 100 to engage the engagement recess 88 of the upper surface mounting piece 83 with the engagement protrusion 87 of the side surface mounting piece 82, The end of the ear piece 83 a of the piece 83 is inserted into the slit 86 of the side surface attachment piece 82.

  Here, when the operator folds the side surface mounting piece 82, the bottom surface mounting piece 84, and the top surface mounting piece 83 to the inside of the cylindrical body 100, as shown in FIG. The front end is made to coincide with the rear end of the cylinder 100. That is, the operator moves the wall body 107 shown in FIG. 18 to the rear side of the cylinder body 100 so that the front end of the flap 92 coincides with the rear end of the cylinder body 100 as shown in FIGS. 19 and 20.

  Further, the operator inserts both end portions of the ear piece 84 a of the bottom surface mounting piece 84 into the slit 86 of the side surface mounting piece 82. Thereby, the ear piece 82 a of the side surface attachment piece 82 is sandwiched between the respective ear pieces 84 a and 83 a of the bottom surface attachment piece 84 and the upper surface attachment piece 83 and the central plate member 91 of the wall body 107.

  By manufacturing the shielding frame 106 by combining the cylindrical body 100 and the wall body 107 in this manner, the shielding frame 106 can be manufactured very simply and inexpensively as in the fourth embodiment.

  Moreover, as shown in FIG. 14B, each flap 92 of the wall body 107 is formed by the rear end portion of the cylindrical body 100, the side surface mounting piece 82, the bottom surface mounting piece 84 and the top surface mounting piece 83 of the cylindrical body 100. Since it is pinched, the airtightness of the connection between the cylinder 100 and the wall 107 is improved. Further, the side surface mounting piece 82, the bottom surface mounting piece 84, and the top surface mounting piece 83 are folded back with respect to the side surface portion 132, the bottom surface portion 136, and the top surface portion 130 of the cylindrical body 100 so as to sandwich the flaps 92 of the wall body 107. When this occurs, the side mounting piece 82, the bottom surface mounting piece 84 and the top surface mounting piece 83 have a restoring force to return to the original, and the action of the restoring force causes the side surface mounting piece 82, the bottom surface mounting piece 84 and the top surface mounting piece 83 to Fits firmly. As a result, the cylindrical body 100 to which the wall body 107 is attached, that is, the shielding frame 106 is reinforced, and the shielding frame 106 is hardly deformed.

  Also in the small animal breeding apparatus 200 of the fifth embodiment having such a configuration, as with the small animal breeding apparatus 1 of the first embodiment, the shielding frame 106 prevents scattering of small animal feces and floor covering material from the breeding cage 2. It is possible to reduce the labor and cost for disinfection and cleaning of small animal feces and floor coverings scattered from the breeding cage 2 while suppressing contamination of the breeding environment.

  Furthermore, in the fifth embodiment, the breeding rack 104 is made of a paper member, and the shielding frame 106 placed on the shelf plate 210 of the breeding rack 104 is also made of a paper member. Disposal of the rearing rack 104 and the shielding frame 106 used for rearing small animals infected with various pathogenic bacteria can be easily performed by incineration while avoiding environmental pollution.

  As a result, it is not only necessary to have rearing equipment such as rearing racks and rearing cages to achieve the intended purpose of the experiment, but also a total that takes into account the experimental process that requires disposal after use of the rearing equipment. A small animal breeding device that can realize ecology can be obtained.

  The cutting and processing of the paperboard 96 can be performed automatically or manually using a known cutting device or processing device. Further, even when the wall body 107 is manufactured, it can be manufactured at low cost if it is automatically performed using a known cutting device, processing device, or the like.

In the fifth embodiment, the cylindrical body 100 is manufactured from a single sheet of paper 96. However, it goes without saying that the cylindrical body 100 may be manufactured by joining two or three or more paperboards 96 together. is there. Further, in the fifth embodiment, the four first bent lines 101 are formed. However, the three first bent lines are formed, and the paperboard 96 is bent inward from the locations of the first bent lines 101 to form a rectangular shape. You may make a frame.
(Embodiment 6)
FIG. 22 shows a sixth embodiment.

  In the small animal breeding apparatus 200 of the fifth embodiment, the air in the shielding frame 106 is exhausted by the suction panel 250 having a large number of ventilation holes (not shown) arranged in close contact with the back end of the shielding frame 106. However, in the sixth embodiment, instead of the suction panel 250, the exhaust pipe 110 to which the exhaust ports corresponding to the individual shielding frames 106 are connected is used.

  22A is a schematic exploded perspective view showing a structure for connecting the shielding frame 106 to the exhaust pipe 110, and FIG. 22B is a schematic view showing a structure for connecting the shielding frame 106 and the exhaust pipe 110. As shown in FIG. A cross-sectional view is shown.

  A rear lid 112 is placed on the rear end of the shielding frame 106 as shown in FIG. 22B, and an air reservoir is provided between the wall 107 and the rear lid 112 constituting the back surface of the shielding frame 106. 113 is formed. The rear lid 112 is provided with an exhaust port 114, and the exhaust port 114 and the exhaust pipe 110 are connected by a socket 115 connected thereto.

  In the sixth embodiment, as shown in FIG. 22B, the air reservoir 113 is formed by covering the rear lid 112 on the rear end of the shielding frame 106, but the rear lid 112 is covered with the shielding frame 106. You may make it form an air pocket part by inserting in the rear part.

Further, the number of the exhaust ports 114 formed in the rear cover 112 and the sockets 115 corresponding to the exhaust ports 114 are not limited to one, and a plurality of each may be provided.
(Embodiment 7)
FIG. 23 shows a seventh embodiment.

  FIG. 23A shows a perspective view from the rear side of the shielding frame 117, and FIG. 23B shows a longitudinal sectional view of the shielding frame 117.

  Similarly to the first embodiment, the shielding frame 117 is configured in a box shape so that the cage 2 can be accommodated, and a cylindrical body 117a having square openings at both ends, and an opening on one end side (rear side) of the cylindrical body 117a. 121 and a wall body 117b that closes 121.

  The cylindrical body 117a includes a rectangular upper surface portion 118 that covers the upper surface of the cage 2, a pair of rectangular side surface portions 119 and 119 that cover a pair of side surfaces of the cage 2, and an upper surface portion that covers the entire bottom surface of the cage 2. And a bottom surface portion 120 having the same rectangular shape as 118.

  The cylindrical body 117a and the wall body 117b can be formed by cutting and bending a paper plate material, respectively.

  An opening 122 on the other end side (front side) of the cylindrical body 117a is a take-out port that allows the cage 2 to be taken in and out. A wall 117b that closes the opening 121 on the rear surface side of the cylindrical body 117a is attached to the cylindrical body 117a so that the opening 121 can be opened and closed. An exhaust port 7b1 is formed in the wall body 117b, and a filter 7b2 is attached to the exhaust port 7b1.

  A contact portion 123 that contacts the lower end portion of the wall body 117b is attached to the rear surface side end portion of the bottom surface portion 120 of the cylindrical body 117a. Thus, when the rear opening 121 of the cylindrical body 117a is closed by the wall body 117b, the lower end portion of the wall body 117b contacts the contact portion 123, so that the rotation of the wall body 117b is stopped and the cylindrical body 117a and Air can be prevented from leaking from the wall 117b.

  The shielding frame 117 according to the seventh embodiment can simplify the connection structure between the cylinder 117a and the wall body 117b as compared with the fourth to sixth embodiments.

  In the field of small animal breeding devices and shielding frames, the present invention covers the breeding cages placed in the breeding racks with a removable shielding frame, thereby suppressing the scattering of small animal feces and floor covering materials from the breeding cages. Small animal breeding equipment that can reduce the labor and cost for the sterilization, cleaning work of small animals scattered from the breeding cages while reducing contamination of the breeding environment, and in the breeding rack It is useful as a device that can provide a removable shielding frame that covers a breeding cage.

1, 1a Small animal breeding device 2, 200 Breeding cage 4, 4a, 104 Breeding rack 6, 6a, 106 Shielding frame 8, 8a, 114, 7b1 Exhaust port 8b Socket 9, 99 Filter 10 Shelf 12 Water supply device (water supply bottle)
15, 15a Take-out port 16 Flow path 18, 18a Airflow direction plate 20 Cage body 22 Cage lid 24 Housing space 30, 30a Upper surface portion 32, 32a Side surface portion 34, 34a Back surface portion 36, 36a Bottom surface portion 38 Inflow hole 40 Frame 41 Top Plate 42 Cage arrangement space 46 Exhaust fan (exhaust device)
47, 47a Exhaust chamber 50, 51, 250 Suction panel 50a, 51a Inner surface plate 50b, 51b Outer surface plate 53 Exhaust duct 55, 110 Exhaust pipe

Claims (10)

A shielding frame for shielding a breeding cage for breeding small animals,
The shielding frame which has an exhaust port for discharging | emitting the atmosphere of the space formed with this shielding frame and this breeding cage covered with this shielding frame.   The shielding frame has an extraction port for taking out the breeding cage from the shielding frame, and the removal port is located on the opposite side of the exhaust port with respect to the breeding cage covered with the shielding frame. The shielding frame according to claim 1.   The shielding frame according to claim 1 or 2, wherein the shielding frame is made of a disposable material.   The said shielding frame has the upper surface part which covers the upper direction of the said breeding cage, the side part which covers the side surface of this breeding cage, and the back surface part which covers the back surface of this breeding cage. Shielding frame.   The said shielding frame has a wind direction board which directs the flow of the air which flows through the space formed with this shielding frame and the said breeding cage covered with this shielding frame in this breeding cage. A shielding frame as described in 1. A breeding cage for breeding small animals;
A breeding rack having a shelf for placing the breeding cage;
A detachable shielding frame for shielding the breeding cage placed on the shelf board,
The small animal breeding apparatus, wherein the shielding frame has an exhaust port for discharging an atmosphere of a space formed by the shielding frame and the breeding cage covered by the shielding frame.   The shielding frame has a take-out port for taking out the breeding cage from the shield frame, and the take-out port is located on the side opposite to the exhaust port with respect to the breeding cage covered with the shielding plate. The small animal breeding apparatus according to claim 6.   The small animal breeding apparatus according to claim 6 or 7, wherein the shielding frame is made of a disposable material.   The said shielding frame has the upper surface part which covers the upper direction of the said breeding cage, the side part which covers the side surface of this breeding cage, and the back surface part which covers the back surface of this breeding cage. Small animal breeding equipment.   The said shielding frame has a wind direction board which orient | assigns the flow of the air which flows through the space formed with this shielding frame and the said breeding cage covered with the said shielding frame to the said breeding cage side. A small animal breeding apparatus according to 1.

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