JPH084013Y2 - Fertilized egg transplanter for livestock - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fertilized egg transplanter for domestic animals for transplanting fertilized eggs (embryos) into the uterus of domestic animals, and more particularly to a bilateral uterine horn transplant method for transplanting into both uterus of domestic animals. A fertilized egg transplanter for livestock suitable for carrying out.

[0002]

2. Description of the Related Art In general, for example, in cattle as livestock, the average number of calves produced for a lifetime is eight, so even if one wants to increase the number of excellent cows, the limit is four. However, in recent years, it has become possible to produce a large number of excellent individuals in a short period of time by subjecting excellent cows to hormone treatment to produce a large number of embryos and transplanting them into other low-performance cows after collection.
It has become possible to significantly improve livestock. Also,
Cryopreservation and distribution of embryos is not only cheaper than moving cattle in vivo, but it also prevents the spread of disease. Furthermore, although cows are originally monotonous animals, twins can be produced by transplanting two embryos. In recent years, twins have been produced to reduce the cost of beef cattle, It contributes to raising the income of breeding farmers.

Further, as a technique for transplanting two embryos for producing twins, there are a method of transplanting two embryos to one uterine horn and a method of transplanting one embryo to both uterine horns. The previous method is easy to transplant and has a high conception rate / twin rate, but it does not lead to an improvement in the production rate due to calf loss due to accidents during pregnancy, miscarriage, premature birth, and calving. On the other hand, the bilateral uterine horn transplantation method has a lower conception rate and twin rate than the unilateral uterine horn transplantation method, but the calf production rate is improved because the accident rate is low. Therefore, this bilateral uterine horn transplantation method has become popular.

Conventionally, as a fertilized egg transplanter for domestic animals for carrying out such transplantation, for example, a straw containing a fertilized egg is mounted in a sheath and the fertilized egg is pushed out by a piston such as a syringe. There is something (for example, Jikkou Sho6
1-39458 publication). When the above-mentioned bilateral uterine horn transplantation method is carried out using this fertilized egg transplanter for domestic animals, a straw containing two fertilized eggs in series is mounted in the sheath, and the piston is pushed in two steps. Fertilized eggs are distributed to each womb.

[0005]

In the conventional fertilized egg transplant for domestic animals described above, since the piston is pushed in two steps, the stroke of the piston is shortened and the stroke is manually adjusted. Therefore, there is a problem that the fertility of the fertilized egg into the uterus is low and the conception rate is low.

In order to solve this problem, conventionally, as a fertilized egg transplanter for domestic animals which carries out the bilateral uterine horn transplantation method, two straws each containing one fertilized egg are attached at the same time, and by gas pressure or liquid pressure, There is also one in which fertilized eggs are separately ejected (Japanese Patent Laid-Open No. 2-191449). However, since the gas pressure or the liquid pressure is supplied, the device becomes complicated, and the pressure supply source is also required separately, so that the operability of the transplanter is poor, especially when a large number of livestock are to be transplanted, When there are many, there is a problem that it is complicated and the workability is poor.
In addition, since the device becomes complicated, the cost is high, which has been an obstacle to the spread.

The present invention has been made in view of the above problems, and aims to improve the probability of injecting a fertilized egg into the uterus and to improve the operability and workability without complicating the device. The point is to provide a fertilized egg transplanter for livestock.

[0008]

A fertilized egg transplanter for domestic animals according to the present invention for solving the above problems is a holder that can be held by hand, and one end is fixed to the holder and the other end is fertilized. A double tube part composed of a pair of tubes in which straws containing eggs are installed side by side, and a fertilized egg in the straws that are inserted when advancing and retracting into each tube through the holder and advancing A pair of pistons for pushing out the piston, a pair of push portions provided at the ends of the pistons located outside the holders for advancing the pistons, and a base end portion of which is fixed to the holder, the dual pipe portion and the attached straw. A sheath-shaped sheath tube that covers the needle and a head that is provided at the tip of the sheath tube and that discharges the fertilized egg that is pushed out from the straw is configured.

[0009] Then, a through hole is formed by forming on the SL each push portion discoidal its axial projection surface overlap each other, the piston and the other of the push portion at one of the push portion of the holder side is provided through It has been configured.

Further, it is effective that the holder has a ring on which a finger can be hooked.

Further, inside the distal end portion of the sheath tube, there is provided a holding guide having a guide hole into which the distal ends of a pair of straws attached to the tubes of the double pipe section are individually inserted. The provision is effective.

Furthermore, a tapered insertion portion into which the proximal end portion of the sheath tube is inserted is formed in the holder, and a male screw portion is formed at the proximal end portion of the insertion portion, and the male screw portion is formed. It is effective to provide a stopper having a female threaded portion that is screwed into the male threaded portion and pressing the proximal end portion of the sheath tube that is screwed into the male threaded portion and inserted into the insertion portion against the tapered surface of the insertion portion. is there.

[0013]

When the fertilized egg transplanter for domestic animals according to the present invention is assembled, the piston is set to the retracted position, the straws containing the fertilized eggs are respectively attached to the pair of tubes of the double pipe section, and the straw tube is used to install the fertilized egg. Cover the connecting pipe and the attached straw. When performing the bilateral uterine horn transplant method, the holder is grasped, the sheath tube is inserted into the vagina of the livestock, and the head is first inserted into one uterus. When one of the push sections is pushed, the piston advances and pushes out the fertilized egg in the straw. As a result, the fertilized egg is ejected from the head to one uterus. Then remove the head from one uterus,
Insert into the other womb. When the other push part is pushed, the piston advances and pushes out the fertilized egg in the straw. As a result, the fertilized egg is ejected from the head to the other uterus.

Further, formed on the disk-shaped that its axial projection surface of the respective push portions overlap each other, since the one of the push portion and the other of the piston to form a through hole penetrating,
The push part is compactly formed, and the lateral movements of the pistons are restricted by the through holes.

Further, when the holder is provided with a ring on which the finger can be hooked, the finger can be hooked on the ring to push the push portion, so that the piston can be easily pushed in the axial direction.

Furthermore, when a holding guide for holding the straw is provided, rattling of the straw is prevented.

Further, when the sheath tube is pressed by the stopper against the tapered surface of the insertion portion, it is possible to surely prevent the sheath tube from rattling.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fertilized egg transplanter for domestic animals according to an embodiment of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show a fertilized egg transplanter T for livestock according to an embodiment.

In the fertilized egg transplanter T for domestic animals according to the embodiment, 1 is a metal holder such as brass that can be held by hand and is formed in a columnar shape. A pair of rings 2 on which fingers can be hooked is provided on the outside of the holder 1.

Reference numeral 3 denotes a dual pipe portion formed by arranging a pair of metal tubes 4 made of stainless steel or the like in parallel, one end of which is fixed to the holder 1 so as to penetrate therethrough. The other end side of each tube 4 has an inner diameter into which a straw S accommodating a fertilized egg is inserted and mounted, and the end of the inserted straw S abuts to position the straw S at a predetermined position. It has a step portion 5 to be turned. The straw S contains a fertilized egg and a culture solution, and a cotton plug that is pushed by the piston 6 to eject the fertilized egg and the culture solution.

The piston 6 is made of a metal such as stainless steel, and is inserted into each tube 4 penetrating the holder 1 so as to be able to move forward and backward, and pushes out the fertilized egg in the straw S attached when advancing. Push portions 7 and 8 for advancing the pistons 6 are provided at end portions of the pistons 6 located outside the holder 1. Both push parts 7 and 8 are
The projection planes in the axial direction are formed in a disk shape overlapping each other,
One push portion 7 on the holder 1 side and the other push portion 8
A through hole 9 through which the piston 6 provided with is penetrated is formed.

Reference numeral 10 denotes a sheath-shaped sheath tube, for example,
It is made of a resin such as polyvinyl chloride and has a base end 11
Is detachably fixed to the holder 1 to cover the double pipe portion 3 and the attached straw S. The fixing means of this sheath tube 10 is a tapered insertion part 12 into which the base end 11 of the sheath tube 10 is inserted into the tip of the holder 1.
And a male screw portion 13 is formed at a base end portion of the insertion portion 12, and a female screw portion 14 that is screwed into the male screw portion 13 is provided, and the male screw portion 13 is screwed into the male screw portion 13 Part 1
It comprises a stopper 15 for pressing the base end portion 11 of the sheath tube 10 inserted in 2 to the tapered surface of the insertion portion 12. As shown in FIG. 4, an axial notch 16 is formed in the proximal end portion 11 of the sheath tube 10 so that the sheath tube 10 can be easily expanded when it is inserted into the insertion portion 12. The sheath tube 10 is replaced with a new one for each livestock.

Reference numeral 20 denotes a metal head such as brass, which is provided at the tip of the sheath tube 10 and discharges a fertilized egg pushed out from the straw S. Head 20
The protruding portion 21 has a streamlined shape, and is easily inserted into the vagina of livestock. The head 20 is inserted inside the distal end portion 17 of the sheath tube 10 and held by the sheath tube 10, and each of the tubes 4 of the dual pipe section 3 is held.
The pair of straws S attached to the front ends of the straws S are individually inserted, and a holding guide 22 having a guide hole 23 for holding the straws S is provided. The guide hole 23 has an opening 25 on the side of the head 20, and the discharge passage 2 through which the fertilized egg passes.
It communicates with 4.

Therefore, when assembling the fertilized egg transplanter T for livestock according to this embodiment, first, as shown in FIG.
The piston 6 is set to the retracted position, and each tube 4 of the double pipe section 3 is
The straws each containing one fertilized egg are attached to the tips. Next, the sheath tube 10 is inserted through the double tube portion 3, the base end portion thereof is inserted into the tapered insertion portion 12, and the tip end of the straw S is held by the holding guide 2 of the head 20.
The two guide holes 23 are individually inserted. Then, the female screw portion 14 of the stopper 15 is screwed into the male screw portion 13 of the base end portion of the insertion portion 12 to press the base end portion 11 of the sheath tube 10 against the tapered surface of the insertion portion 12. In this case, the sheath tube 10
Is pressed against the tapered surface of the insertion portion 12 by the stopper 15, so that it is securely fixed to the holder 1. Further, since the tip of the straw S is held by the holding guide 22, a rattling situation is prevented.

When carrying out the bilateral uterine horn transplantation method, as shown in FIG. 5, the holder 1 is grasped by hooking the ring 2 on the ring 2, and the sheath tube 10 is inserted into the vagina of the livestock. The head 20 is inserted into one uterus and one push portion 7 is pushed (FIG. 5 (a)). As a result, the piston 6 advances and pushes out the fertilized egg in the straw S, and the fertilized egg is discharged from the head 20 to one uterus. next,
The head 20 is pulled out from one uterus (Fig. 5 (b)), inserted into the other uterus, and the other push portion 8 is pushed (Fig. 5).
(C)). As a result, the piston 6 advances and pushes out the fertilized egg in the straw S, and the fertilized egg is discharged from the head 20 to the other uterus.

In this case, the holder 1 has a structure in which the ring 2 is hooked with a finger and the piston 6 is pushed, so that the apparatus is simple. Fertilized eggs can be injected just by pushing the piston 6, which makes the operation easy and, because it is compact, it is easy to carry, there are many livestock to be transplanted, and the livestock shed is large. Even if there are many, workability is improved.
Further, since the head 20 has a streamlined shape, it can be easily passed through the cervix, and the head 20 can be reliably inserted into the uterus. In this respect as well, the operation can be easily performed. Furthermore,
Since the fertilized egg can be injected by pushing the different piston 6 for each uterus, the stroke of the piston 6 can be made sufficiently long, and since it is not necessary to manually adjust the stroke, the fertilized egg can be surely pushed out. .

Further, since the push portions 7 and 8 are formed in a disk shape whose axial projection surfaces overlap with each other, they are compact and easy to operate. Also,
Since the piston 6 provided with the other push portion 8 penetrates the through hole 9 of the one push portion 7 on the holder 1 side, the lateral movements of the piston 6 are restricted from each other, and therefore, the axial movement of the piston 6 is restricted. The movement is smooth.

Further, since the fingers can be hooked on the ring 2 to push the push portions 7 and 8, it is easy to push in the axial direction,
Therefore, the fertilized egg can be surely pushed out. Further, since the sheath tube 10 is securely fixed to the holder 1 by the stopper 15 and the tip of the straw S is held by the holding guide 22, rattling can be prevented, and only that.
The piston 6 can be smoothly advanced, the fertilized egg can be surely pushed out, and the probability of injecting the fertilized egg into the uterus is improved.

The test results for bovine embryo transfer are as follows:
Although this transplanter T had a thickness 1.6 times that of the thinnest conventional transplanter, 97% of the bilateral uterine horn transplantation time was completed within 10 minutes to 31 heifers studied for transplantation. Also, the rate of delivery of 2 embryos from the straw set in the transplanter T is 100%.
Met. The stepwise-embryo-treated embryos were enclosed in straws, and the embryos were set in the transplanter T and then transplanted into 15 heifers. As a result, 12 (80%) were conceived. Similar results were obtained in other tests. In the past, a conception rate of 60% was a good one, but the transplanter T according to the present invention recorded a very high conception rate.

The transplanter T according to the above embodiment is not limited to cattle and can be applied to various livestock.

[0031]

As described above, according to the fertilized egg transplanter for domestic animals of the present invention, the fertilized egg can be injected by simply pushing the piston manually. Also, the cost can be reduced. Further, since the fertilized egg can be injected just by pushing the piston, the operation is easy, and since it is compact, it is easy to carry and the workability can be greatly improved. Furthermore, since the fertilized egg can be injected by pushing different pistons for each uterus, the stroke of the piston can be made sufficiently long, and
Since it is not necessary to manually adjust the stroke, the fertilized egg can be surely pushed out, and the probability of injecting the fertilized egg into the uterus can be improved. As a result, farmer's yard transplantation can be performed by one person, and in the future, thawing of frozen embryos will be performed in the farmer's yard (direct transplantation method). Become.

Further, each push portion is formed in a disk shape whose axial projection surfaces overlap each other, and one push portion on the holder side is formed with a through hole through which the piston having the other push portion is passed. Since the push part can be formed compactly and the operability can be improved,
The lateral movements of the pistons are regulated to each other so that the pistons can move smoothly in the axial direction, and the fertilized egg can be pushed out reliably.

Further, when the holder is provided with a ring on which the finger can be hooked, the finger can be hooked on the ring to push the push portion, so that the piston can be pushed in the axial direction easily, and the operability is good, and The fertilized egg can be surely pushed out.

If the tips of the straws are individually held by the holding guides, rattling of the straws can be prevented, and the piston can be smoothly advanced. Can be pushed out.

Furthermore, when the sheath tube is pressed against the taper surface of the insertion portion by the stopper, it is possible to prevent the sheath tube from rattling and to smoothly advance the piston. The fertilized egg can be surely pushed out.

[Brief description of drawings]

FIG. 1 is a perspective view showing a fertilized egg transplanter for domestic animals according to an embodiment of the present invention together with an inserted state into domestic animals.

FIG. 2 is a cross-sectional view showing an assembled state of a fertilized egg transplanter for domestic animals according to an embodiment of the present invention.

FIG. 3 is a sectional view of a main part of a fertilized egg transplanter for domestic animals according to an embodiment of the present invention.

FIG. 4 is a partially cutaway side view of a sheath tube of a fertilized egg transplanter for domestic animals according to an embodiment of the present invention.

FIG. 5 is a process diagram when a fertilized egg is transplanted to livestock using the fertilized egg transplanter for livestock of the present invention.

[Explanation of symbols]

 T Fertilized egg transplanter for domestic animals S Straw 1 Holder 2 Ring 3 Double pipe part 4 Tube 6 Piston 7, 8 Push part 9 Through hole 10 Sheath pipe 12 Insert part 15 Stopper 20 Head 22 Holding guide 23 Guide hole

Claims (4)

[Scope of utility model registration request] 1. A double pipe section composed of a holder that can be held by hand and a pair of tubes in which one end is fixed to the holder and a straw in which a fertilized egg is stored is attached to the other end side by side. And a pair of pistons that penetrate through the holder and are inserted into each tube so as to be able to move forward and backward, and push out the fertilized eggs in the straws that are mounted when advancing, and the pistons that are provided at the ends of the outside of the holder of each piston and advance the pistons. A pair of push parts, a sheath-shaped sheath tube whose proximal end is fixed to the holder and covers the above-mentioned double pipe part and the above-mentioned straw, and a fertilized egg ejected from the straw provided at the tip of the sheath tube is discharged. and a head for its axial said each push portion
The projection surfaces are formed in a disk shape that overlaps each other, and
Piston with the other bush part on the push part of the
A fertilized egg transplanter for domestic animals, which is characterized in that a through hole is formed therethrough . 2. The fertilized egg transplanter according to claim 1, wherein the holder is provided with a ring on which a finger can be hooked. 3. A holding guide for holding the straw is provided inside the tip of the sheath tube, and having guide holes into which the tips of a pair of straws attached to the tubes of the dual pipe section are individually inserted. It is provided, The claim 1 or 2 statement
Livestock embryo transfer device of the mounting. 4. A tapered insertion portion into which the proximal end portion of the sheath tube is inserted is formed in the holder, and a male screw portion is formed at the proximal end portion of the insertion portion, and the male screw portion is formed in the male screw portion. A stopper for pressing the base end of the sheath tube screwed into the male threaded part and inserted into the insertion part against the tapered surface of the insertion part. Claim
The fertilized egg transplanter for livestock according to item 1, 2 or 3 .