JPH0444065Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a laboratory animal breeding cage for breeding laboratory animals such as mice, rats, or guinea pigs.

(Prior Art) As shown in FIG. 4, this type of experimental animal breeding cage includes a cage body 1 made of a box-shaped transparent synthetic resin, and a box-shaped cage body 1 made of transparent synthetic resin for easy observation through the inside.
The wire mesh lid 2 is composed of a lattice-shaped wire mesh lid 2 that closes the top opening, and the wire mesh lid 2 is composed of an outer peripheral frame and a large number of horizontal and vertical bars assembled in a lattice shape. A recessed portion 3 with a substantially V-shaped cross section for feeding is formed on the side of the container, into which bait and drinking utensils are placed.
The experimental animal in the cage body 1 comes into contact with the food and the mouth of the water drinking device through the wire mesh of the recessed part 3.

(Problem that the invention aims to solve) By the way, rodents such as mice, rats, and guinea pigs, which are experimental animals, have a habit of chewing things, so the cage body is made of relatively soft transparent synthetic resin. 1, as shown in FIG. 4, the experimental animal entered the edge of the side wall opening and chewed off the edge 1a, causing wear and tear on the cage body 1 and errors in the setting conditions for the amount of food input. The problem is that the experimental conditions may vary.

In view of the above-mentioned difficulties, the present invention aims to provide a laboratory animal breeding cage in which an obstacle is provided on the wire mesh lid to prevent the laboratory animal from entering the opening edge side of the cage body 1. A further object of the present invention is to provide a laboratory animal breeding cage in which the above-mentioned obstacles can be easily formed.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides that the outer peripheral frame and the vertical and horizontal bars forming the wire mesh lid are located on the same plane except for the feeding recess. In addition, the outer circumferential frame is configured to have a larger diameter than the upper opening of the cage body so as to protrude outside the upper opening of the cage body, and the wire mesh lid is provided so that the experimental animal can be placed on the edge side of the side wall opening of the cage body. An obstacle is provided to prevent intrusion, and the obstacle installed on the edge side of one vertical side wall is to block each of the horizontal bars except for the two horizontal bars at both ends of the large number of horizontal bars into the cage body. Approximately V toward the inside of
The obstacle consists of a narrow narrow gap formed between an inner protrusion formed by a letter-shaped bend and the one vertical side wall, and is provided at the edge of the other vertical side wall.
A feeding recess formed by bending each of the horizontal bars except for two horizontal bars at both ends of a large number of horizontal bars toward the inside of the cage body into a substantially V-shape larger than the inner protrusion; and the other vertical side wall adjacent to the wall, and the obstruction provided on the edge side of each horizontal side wall is located adjacent to each horizontal side wall among the many horizontal bars. A structure characterized by a narrow gap formed between the horizontal rail and the horizontal side wall is adopted.

(Example) In FIG. 1, 1 is a box-shaped cage body with an opening on the top made of transparent synthetic resin such as polycarbonate or polypropylene, and 2 is a lattice-like wire mesh lid that closes the opening on the top of the cage body 1. It is locked to the cage body 1 by locking tools 5 provided at both ends thereof.

The wire mesh lid 2 is formed from an outer peripheral frame 6 and a large number of horizontal bars 7 ₁ to _o and vertical bars 8 _{1 to o} arranged in a lattice shape. This wire mesh lid 2 has horizontal bars 7 1 , 7 at both ends among the large number of horizontal bars 7 ₁ to _o of the wire mesh lid 2 at an end close to one vertical side wall 1 b on the short side of the cage body ₁ . The inner protrusion 9 is formed by bending each of the horizontal bars ₇₂ to _o-1 except for o in a substantially V _- shape toward the inside of the cage body 1, and as shown on the right side of FIG. Between the inner protrusion 9 and the one vertical side wall 1b, there is a gap 〓C ₁
A narrow overflow portion 4A is formed to prevent experimental animals from penetrating to the edge 1a of the vertical side wall 1b. Therefore, the narrow portion 4A between the inner protrusion 9 and the one lateral side wall 1b becomes an obstacle for preventing the experimental animals from entering, and the side wall edge 1a is not bitten by this obstacle. There isn't.

Further, as shown in FIG. 1, on the end side of the wire mesh lid 2 near the other vertical side wall 1c, two horizontal bars 7 ₁ at both ends of the numerous horizontal bars 7 ₁ to _o of the wire mesh lid 2 are provided. ,7 ₂ ,
Each horizontal bar 7 ₃ to o- ₂ except 7 _o and _{7 o-1} is attached to the cage body 1
A feeding recess 10 is formed by bending into a substantially V shape larger than the inner protrusion 9, and as shown on the left side of FIG. 2, this recess 10 and the other vertical side wall 1c The gap _C2 is also narrowed to prevent experimental animals from penetrating to the edge 1a of the vertical side wall 1c. This feeding recess 10 is preferably formed as close to the vertical side wall 1c as possible. Therefore, the narrow narrow part 4B between _C2 formed between this concave part 10 and the vertical side wall 1c becomes an obstacle for preventing the experimental animals from entering, and this obstacle blocks the vertical side wall 1c. The edge 1a of the side wall 1c will not be bitten.

Further, as shown in FIG. 3, in both lateral walls 1d, 1d on the long side of the cage main body 1, among the horizontal bars ₇₁ to _7o constituting the wire mesh lid 2, both side wall portions 1
Horizontal beams 7 ₁ , 7 _o adjacent to d and 1 d and both side walls 1
A narrow portion 4C is formed between C ₃ and d and 1d to a width that prevents experimental animals from entering the side wall edges 1a and 1a. Therefore, this narrow overflow portion 4C acts as an obstacle to prevent the side wall edges 1a, 1a from being bitten.

(Effects of the invention) According to the invention, by providing the wire mesh lid with an obstacle along the edge of the side wall of the cage body to prevent the experimental animal from entering, the obstacle prevents the experimental animal from entering the cage. Biting of the side wall edges of the cage body is prevented, and the breeding management of experimental animals can be maintained in a good manner.

In particular, the obstacles for preventing intrusion of laboratory animals in the present invention include the outer peripheral frame and vertical and horizontal bars forming the wire mesh lid.
Excluding the feeding recess, the cage is configured to be located on the same plane, and the outer circumferential frame of the wire mesh is configured to have a larger diameter than the upper opening of the cage body so as to protrude outside the upper opening. At the top, there is a gap between the edge of the wire mesh lid and the edge of the side wall of the cage body.
Since the cage has a narrow overflow, when this wire mesh cover is attached to the cage body,
The lower surface of the wire mesh lid is flush with the side wall edge of the cage body, excluding the obstruction and the feeding recess;
Therefore, there is an effect that the space within the cage body, particularly the height space from the bottom surface to the edge of the side wall within the cage body, can be utilized to the maximum extent.

In addition, in order to form an obstacle on the edge side of one vertical side wall of the cage body, each of the horizontal bars except for the two horizontal bars at both ends of the large number of horizontal bars should be turned approximately toward the inside of the cage body. It is sufficient to form an inner protrusion formed by bending it in a V-shape, and in order to form an obstacle on the edge side of the other vertical side wall, each of the many horizontal bars except two at both ends can be formed. A feeding recess, which is formed by bending the horizontal bar toward the inside of the cage body and into a substantially V shape larger than the inner protrusion, may be formed as close to the other vertical side wall as possible, Furthermore, obstacles on the edge side of each horizontal side wall can be created by arranging horizontal bars adjacent to each horizontal side wall among a large number of horizontal bars close to the horizontal side wall. Processing becomes very simple and easy, and therefore manufacturing costs can be expected to be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a laboratory animal breeding cage which is an embodiment of the present invention, FIG. 2 is a longitudinal sectional view thereof, FIG. 3 is a transverse sectional view thereof, and FIG. 4 is a longitudinal sectional view of a conventional example. 1...Cage body, 1a...Each side wall edge of the cage body, 1b, 1c...Vertical side wall of the cage body, 1
d... Horizontal wall of cage body, 2... Wire mesh lid, 4
A, 4B, 4C... Narrow portion (obstacle), 6... Outer frame, 7 ₁ ~ _o ... Horizontal bar, 8 ₁ - _o ... Vertical bar, 9...
Inner protrusion, 10...feeding recess.

Claims (1)

[Scope of utility model registration request] It consists of a box-shaped cage body and a wire mesh lid that closes the upper opening of the cage body, and the wire mesh lid is
The wire mesh lid is used in an experimental animal breeding cage that is composed of an outer peripheral frame and a large number of horizontal and vertical bars arranged in a lattice pattern, and is provided with a recessed portion for feeding at one end of the wire mesh lid. The outer peripheral frame and vertical and horizontal bars to be formed are configured to be located on the same plane except for the feeding recess, and the outer peripheral frame is arranged so as to protrude from the upper opening of the cage main body to the outside of the upper opening. The wire mesh lid also has a large diameter, and the wire mesh lid has a
Obstacles are installed to prevent experimental animals from entering the edge of the side wall opening of the cage body, and the obstacles installed on the edge of one vertical side wall are the two horizontal bars at both ends of the large number of horizontal bars. A narrow narrow space formed between an inner protrusion formed by bending each of the horizontal bars except for the horizontal bars in a substantially V-shape toward the inside of the cage body, and the one vertical side wall. The obstacle provided on the edge side of the other vertical side wall is arranged such that each of the horizontal bars, excluding two horizontal bars at both ends, is approximately larger than the inner protrusion, with each of the horizontal bars facing the inside of the cage body. It consists of a feeding recess formed by bending into a V-shape and a narrow overflowing part formed between the other vertical side wall adjacent thereto, and further provided on the edge side of each horizontal side wall. The obstacles are
1. A laboratory animal breeding cage characterized by comprising a narrow gap formed between a plurality of horizontal bars adjacent to each side wall and the horizontal side wall.