JPH03168Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an animal fixing device used for immobilizing various experimental animals such as rabbits and guinea pigs during animal experiments.

(Prior Art) Conventional animal restraints include those shown in FIGS. 6 and 7, for example.

Fixture A shown in FIG. 6 has a box-shaped main body a with an open upper surface and integrally provided with a forelimb storage part b for an animal R at the lower front end, and a box-shaped main body a that closes the upper opening of this main body a. It is composed of a lid plate c for use in the body, and a nose fixing device d provided on the upper surface of the forelimb storage part b, and the lid plate c is attached to the main body a so as to be openable and closable with hinges e, e. At the same time, it is tightened by fasteners f, f. Further, each of the front end portions of the main body a and the cover plate c is provided with a substantially semicircular notch, and an opening g for allowing the head of the animal R to protrude is formed. In order to fix the animal using the fixing device A like this, the lid plate c
is opened and the animal R is placed into the main body a through the upper opening, and the nose of the animal R is inserted into the nose fixing device d. Then, the cover plate c is closed and the stopper f,
Tighten with f to complete. In addition, when there is no need to fix the nose part, the nose part fixing device d can be removed from the main body a.

On the other hand, the fixture B shown in FIG. 7 has an outer cylinder n that is open at both ends and has a substantially U-shaped notch m formed in the upper part of the front end, and an opening that is closed only at the front surface p and runs along the longitudinal direction on the top surface. It is composed of an inner cylinder s having a shape r formed therein, and the inner cylinder s can be fitted into the outer cylinder n, and can be fixed at any position by screws t on both sides. . In addition, the symbol u in the figure
is a nose fixing ring fixed to the upper front end of the inner cylinder s. To fix an animal using the fixture B, the animal (not shown) is placed in the outer tube n.
At the same time, the animal's nose is inserted into the snout fixing ring u, and then the inner tube s is pushed into the outer tube n, and the animal's neck is inserted into the notch of the outer tube n. Hold it down from the rear with part m, and finally tighten screw t to complete.

The conventional animal restraints A and B described above are both made of metal so as to withstand high temperatures during heat sterilization.

(Problems to be Solved by the Invention) However, the above-mentioned conventional animal restraints A and B had the following problems.

In the box-shaped fixture A, animals can be taken in and taken out from the top opening of the main body a by opening the cover plate c as described above, so when the animal is put in, the animal may become violent and damage the edges of the top opening and the cover plate. There was a high risk of injury to the hind limbs, etc. at the edge of c. Another problem was that the animal often pushed open the cover plate c and jumped out of the main body a as soon as the stoppers f and f were removed after the experiment was completed. Furthermore, because the shape is box-shaped, if you try to approach an animal's eyeball from the side or diagonally behind, for example, the upper side edges h, h will get in the way, making it difficult to conduct a satisfactory experiment. I had a problem that I didn't have. Moreover, since hinges e, e and stops f, f are provided on both sides of the main body a, these hinges e, e and stops f, f get in the way, and a large number of fasteners A... They cannot be lined up horizontally, which takes up extra space, and the hinges e and stops f of adjacent fixtures A can get caught on each other, resulting in damage, and sometimes the fasteners f can be accidentally damaged. There was a problem when the handle came off and the animal jumped out. Furthermore, since there are hinges e, stops f, etc., there is a problem that dust and foreign matter tend to accumulate in these parts, making them unsanitary. In addition, since the main body A of the fixture A is box-shaped, and its top opening is closed with a cover plate c, the interior of the main body a is almost sealed;
For this reason, if the experiment lasted for a long time, the temperature inside the fixture would rise due to the animal's body temperature, etc., which would impair the animal's physical condition, making it impossible to obtain accurate experimental data.

On the other hand, in the case of the cylindrical fixture B, the front surface p of the inner tube s, where the animal's head side is, is completely closed.
The animal instinctively thrusts its forelimbs against the front surface p, making the animal's posture very unnatural. As a result, there was a problem in that it caused unnecessary stress to the animals and made it impossible to obtain accurate experimental data. In some cases, the animal may thrust its forelimbs against the front p and kick its hind legs backwards, which may cause the animal to injure its spinal cord or its hip joints. I had a problem when it dislocated. Furthermore, the fixing device B includes inserting the animal through the rear end opening l of the outer tube n, and pulling out the head from the gap formed by the notch m of the outer tube n and the opening r of the inner tube s.
After that, push the inner cylinder s into the outer cylinder n and tighten the screw t.
Since the animal is secured using a procedure such as tightening the tubes, it is extremely difficult for one worker to secure the animal in the two tubes by one worker, even if the animal is already trying to escape and become violent. There was a problem in that when an animal was placed in the container, the animal would put its forelimbs into the gap between the outer tube n and the inner tube s and strain, potentially damaging the forelimbs. In addition, since the structure is a double cylinder structure consisting of an outer tube n and an inner tube s, and one end p of the inner tube s is closed, it is difficult to clean the inside and it is easy to become unsanitary. It was hot. Moreover, the inside of Fixture B is almost sealed like Fixture A, so if the experiment lasts for a long time, the temperature inside the Fixture will rise due to the animal's body temperature, etc. There was a problem that it made it difficult to obtain accurate experimental data because of the damage caused to the patient's physical condition.

In addition to the above-mentioned problems, both A and B have a large number of parts, so they are heavy and difficult to handle.

(Means for Solving the Problems) The animal fixing device according to the present invention has a front end bent diagonally downward, and a long hole serving as an exit for the animal's head extending from the bent part to the rear end. A top plate is formed in the front end, and a roughly U-shaped cut out part that serves as an animal's neck holder is formed integrally with the elongated hole from the bent part toward the front end. Side plates extending downward from both side edges, and a bottom plate provided approximately parallel to the top plate between the lower edges of these side plates, so that the rear end is fully open and the front edge of the top plate A hollow box-shaped fixing device body having an opening between the top plate and the front edge of the bottom plate is constructed, and the connecting portion between the top plate and both side plates is chamfered, so that it becomes like this. Immediately after the head protrusion opening of the fixture main body, there is a approximately U-shaped portion at the tip that serves as an animal's neck restraint.
A fixing plate having a letter-shaped notch is provided so as to be slidable along the front-rear direction of the fixture main body, fixable at any position, and detachable.

(Function) The function of the present invention will be described in the first example showing one embodiment of the present invention.
This will be explained with reference to the figures and FIG.

To fix an animal using the animal fixation device of the present invention, first loosen the fixing screws 12, 12, and fix the fixing plate 2.
is brought to the rear end portion 10 side of the fixture main body 1. Subsequently, the animal (rabbit in this example) is inserted into the opening of the rear end 10 of the fixture main body 1 with its head first. At this time, since the rabbit R has a habit of trying to enter the hole, the rabbit R eventually enters the fixture main body 1 without becoming violent. Next, the head H of the rabbit R is made to protrude from the head protrusion opening 4, and the fixing plate 2 is slid to the front end side of the fixture main body 1, and the neck of the rabbit R is inserted from the front and back of the fixture main body 1. Neck holder 5 and fixing plate 2
The fixing work is completed by tightening the fixing screws 12, 12. At this time, since there is an opening 11 at the front end of the fixture main body 1, the rabbit R is fixed in a natural posture without straining its front legs. During an experiment, for example, when bringing a test instrument close to the rabbit R's eyeball from the side or diagonally backward, the connecting parts of the top plate 6 and both side plates 8, 8 are chamfered 7, 7, respectively. Test instruments can be brought close together without being disturbed. To take rabbit R out of the fixture after the experiment is over, loosen the fixing screws 12, 12 and move the fixing plate 2 backward, then insert your hand through the rear end 10 of the fixture main body 1 and grasp the tail etc. Pull out.

Disinfecting the fixture can be done after removing the fixing plate 2 from the fixture body 1.
Since it has an opening at both the front and rear and has a simple shape, it is easy to work with and can completely remove dust and foreign matter.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of the animal fixation device according to the present invention, and FIG. 2 is a sectional view of the same side.

This fixture consists of a fixture body 1 and a fixing plate 2.

The fixing device main body 1 includes a top plate 6 whose front end is bent diagonally downward 3, side plates 8, 8 extending downward from both side edges of the top plate 6, and these side plates 8, 8. The rear end 10 is entirely open due to the bottom plate 9 provided substantially parallel to the top plate 6 between the lower edges, and an opening 11 is formed between the front edge of the top plate 6 and the front edge of the bottom plate 9. It is formed in the shape of a hollow box, and the connecting portions between the top plate 6 and the side plates 8, 8 are chamfered 7, 7.

In the top plate 6, a long hole 4, which serves as an outlet for the animal's head, is formed from the bent portion 3 toward the rear end, and a substantially U-shaped cutout, which serves as the animal's neck holder, is formed in the top plate 6. A portion 5 is integrally formed with the elongated hole 4 from the bent portion 3 toward the front end. Further, this top plate 6 is provided with fixing screws 1 for fixing the fixing plate 2.
Screw holes 13 and 13 (see FIG. 2) that are screwed into the screw holes 2 and 12 are provided at appropriate intervals along the front and back direction of the top plate 6 at the rear position of the head protrusion opening (elongated hole) 4. It is being

The width and length of the fixture main body 1 as described above,
In addition, the width and length of the head protrusion opening 4 and the neck holder (cut section) 5 provided in the top plate 6 are determined depending on the size of the animal used in the experiment (i.e., the type of animal such as a rabbit or a guinea pig). It will be determined as appropriate. Further, the angle of inclination of the front end of the top plate 6 is such that the inner surface of the front end does not press the chest or forelimbs of the animal. In addition, the chamfered portions 7, 7
is not limited to an inclined surface as shown in FIG. 1, but may be a curved surface as shown in FIG. 3, for example.

On the other hand, the fixing plate 2 has a width such that when it is mounted on the top plate 6, both side edges thereof do not protrude above the chamfered portions 7, 7. Further, a substantially U-shaped notch 14 is formed at the tip of the fixing plate 2 and serves as a neck presser for holding the animal's neck from behind. The width of the notch 14, that is, the neck presser 14, is approximately equal to the width of the head protrusion 4. Further, the fixing plate 2 has an elongated screw insertion hole 15 formed along its longitudinal direction. The fixing plate 2 configured as described above is slidable in the front-rear direction of the fixture body 1 immediately after the head protrusion opening 4 of the fixture body 1 by means of the fixing screws 12, 12 described above, and can be moved at any position. It is fixedly and removably attached. Note that the shape of the fixing plate 2 is not limited to the illustrated example;
For example, if a raised portion 16 as shown in FIG. 4 is provided on the periphery of the neck presser 14 of the fixed plate 2, the contact area between the periphery of the neck presser 14 and the animal's neck will be large, and the animal will be It can reduce the feeling of pressure. Furthermore, the attachment means to the fixture main body 1 is not limited to the above-mentioned embodiments, and for example, the fifth
As shown in the figure, a guide groove 17 whose width is approximately equal to the width of the fixed plate 2 is formed in the top plate 6 along its longitudinal direction, and the fixed plate 2 is slid into the guide groove 17. It may be installed by fitting it in as much as possible. In this case, the fixing plate 2 is restricted by the guide groove 17 and does not rotate, so the number of fixing screws 12 can be reduced to one.

The fixing device main body 1, fixing plate 2, and fixing screws 12, 12 are made of metal, heat-resistant hard plastic, or the like so as to be able to withstand high temperatures during heat sterilization.

Next, the procedure for fixing an animal using the fixing device described above will be explained using a rabbit as an example.

First, the fixing screws 12, 12 are loosened to move the fixing plate 2 toward the rear end portion 10 of the fixture main body 1. Subsequently, the rabbit R is inserted into the opening of the rear end portion 10 of the fixture main body 1 with its head first. At this time, since the rabbit R has a habit of trying to enter the hole, the rabbit R eventually enters the fixture main body 1 without becoming violent. Next, the head H of the rabbit R is made to protrude from the head protrusion opening 4, and the fixing plate 2 is slid to the front end side of the fixture main body 1, and the neck of the rabbit R is inserted from the front and back of the fixture main body 1. The neck support part 5 and the neck presser part 14 of the fixing plate 2 are used to hold down the neck, and finally the fixing screws 12, 12 are tightened to complete the fixing work. At this time, since there is an opening 11 at the front end of the fixture main body 1, the rabbit R is fixed in a natural posture without straining its front legs. During an experiment, for example, when bringing a test instrument close to Rabbit R's eyeball from the side or diagonally backward, the top plate 6, both side plates 8, 8, and the connecting portions are chamfered 7, 7, respectively, so that nothing happens. Test instruments can be brought close together without being disturbed.
To take rabbit R out of the fixture after the experiment is over, loosen the fixing screws 12, 12 and move the fixing plate 2 backward, then insert your hand into the rear end 10 of the fixture main body 1 and grasp the tail etc. Pull out Rabbit R.

In addition, after fixing the rabbit R as above,
If you need to further fix Rabbit R's nose,
An appropriate nose fixing member (not shown) may be attached to the inclined surface 6a of the top plate 6 of the fixture main body 1. In addition, disinfection of the fixture is performed from the fixture body 1 to the fixture plate 2.
This can be done after removing the fixing screws 12 and 12, respectively. At this time, the fixing device main body 1 is open at both the front and the back and has a simple shape, so it is possible to perform the work easily and to remove dust and foreign objects. Can be completely removed.

(Effects of the invention) As described above, the animal fixation device of the present invention is designed so that the animal is inserted through the opening at the rear end of the device body, so it is not possible to place the animal inside the device as in the conventional case. There is no risk of the animal becoming violent and causing injury to the front or hind limbs when being put in, and there is no possibility that the animal will inadvertently jump out of the fixing device.

In addition, since the connecting parts between the top plate and both side plates are chamfered, there is no interference when, for example, testing equipment is brought close to the animal's eyeball from the side or diagonally backward during an experiment. , one can perform satisfactory experiments.

Furthermore, since there are no protrusions such as hinges or stops on both sides of the fixing device, it is possible to pull together a large number of fixing devices and line them up horizontally, and also to prevent the fixing devices from pulling together. There's nothing to worry about.

Furthermore, the fixing device is open on both the front and back,
Since the shape is simple, cleaning and disinfection operations can be performed easily, and dust and foreign matter can be completely removed, so that favorable sanitary conditions can be maintained at all times.

In addition, since the fixture is open both at the front and rear,
There is almost no heat build-up within the fixture, and the animal's physical condition will not be affected. As a result, accurate experimental data can be obtained.

Moreover, since the front end of the top plate of the fixture is sloped and the front end is open, the animal is not forced to stretch its forelimbs inside the fixture, and the animal is fixed in a natural posture. be able to. Therefore, there is no risk of causing unnecessary stress to the animal, and there is no risk of causing damage to the spinal cord by causing the animal to thrust forward with its front legs and kick its hind legs backwards, as in the past. There is no risk of injury if the hip joint is dislocated.

In addition, when fixing an animal, it is enough to just protrude the head from the head opening and press the neck with the fixation plate, so even a single worker can easily fix the animal without using both hands. It can be fixed and has excellent workability.

Furthermore, since the structure is simple and the number of parts is very small, it is easy to handle and the weight can be sufficiently reduced.

[Brief explanation of drawings]

1 to 5 show an embodiment of the animal fixation device according to the present invention, FIG. 1 is a perspective view showing one embodiment of the animal fixation device, FIG. 2 is a sectional view of the same side, and FIG. 3 is a FIG. 4 is a perspective view showing another example of the fixing plate; FIG. 5 is a sectional view showing another example of the attachment state of the fixing plate; FIG. 7 and 7 are side views showing a conventional animal fixation device. DESCRIPTION OF SYMBOLS 1... Fixture body, 2... Fixing plate, 3... Long hole (head protrusion opening), 4... Bending part, 5... Cutting part (neck receiving part), 6... Top plate, 7 ... Chamfer, 8 ... Side plate,
9... Bottom plate, 10... Rear end, 11... Opening,
12... Fixing screw, 14... Notch (neck presser).

Claims (1)

[Scope of utility model registration request] The front end is bent diagonally downward, and a long hole is formed from the bent part toward the rear end to serve as an exit for the animal's head. A top plate whose cutout portion extends from the bent portion toward the front end and is integrally formed with the elongated hole, side plates extending downward from both side edges of the top plate, and lower end edges of these side plates. A hollow box-shaped fixture having a rear end that is entirely open and an opening between the front edge of the top plate and the front edge of the bottom plate, with a bottom plate provided substantially parallel to the top plate between them. A main body is constructed, and the connecting part between the top plate and both sides of the fixture body is chamfered, and the animal's neck is attached to the tip immediately after the head protrusion opening of the fixture body. A fixing plate having a substantially U-shaped notch serving as a holding part is provided so as to be slidable along the front-rear direction of the fixture body, fixable at any position, and detachable. animal restraints.