JPS599610Y2 - Straw tube installation stand - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a straw pipe installation stand.

The applicant has already used dimethyl sulfoxide, glucose, glycerin,
A buffer solution C prepared by dissolving sodium citrate in distilled water is stored, and objects to be frozen such as fertilized eggs and sperm d are placed in the buffer solution C.
According to this proposed device, the liquid portion C' containing the frozen object d in the buffer solution is immersed in the refrigerant f, The straw tube a must be arranged so that the non-storage liquid portion c'' projects from the liquid level of the refrigerant f to the tank gas phase g.

Therefore, as mentioned above, the straw tube a is held on the installation stand in order to stand up, but the current straw tube installation stand h
As shown in Fig. 1, the straw tube a is fitted into a hole i formed in a metal plate to hold it, so when the installation stand h is pulled up from the refrigerant f, moisture in the air is removed. It condenses and freezes on the metal plate, which is at a low temperature, and the straw tube a becomes stuck in the hole i, so that when the straw tube a is removed, it cannot be pulled out from the hole i.

Therefore, if the hole i is made larger than the straw tube a as shown in Figure 2 to prevent the swimsuit from forming, the straw tube a will float up due to the buoyancy of the refrigerant f even if it does not fall down, so it will stand up from the metal plate. A weight plate k is fitted and arranged in a vertically movable manner on a guide rod j provided, and the straw tube a is moved by the weight movement k.
It is necessary to prevent the straw tube a from floating up by pressing it against the metal surface. However, when using such a structure, the hole i in the installation base h should be made larger. When loading a large number of straw tubes a, the straw tubes tend to fall over, so it is necessary to load each straw tube a while moving the weight plate k up and down each time. You have to spend a lot of effort and time on that work.

The present invention was developed in view of the above-mentioned conventional circumstances, and was developed to prevent moisture from condensing on the mounting member, to hold the mounting member without lifting it, and to easily and quickly load the straw tube. The key is to provide something that does not bend the straw tube by applying strong pressure to it, and is also convenient for measuring the temperature of the liquid inside the tube. .

The drawings showing the embodiments of the present invention will be described in detail below.
As shown in FIGS. 3 and 4, a guide rod 4 is hung from the center of the back surface of a lid plate 2 with a handle 3 that serves as the upper lid of a low temperature chamber 1 such as a low temperature constant temperature chamber. An upper mounting member 6 and a lower mounting member 7 are installed at appropriate intervals above and below the upper mounting member 6, and a straw tube holding slide pin 9 made of Teflon or the like is inserted into the through mounting hole 8 of the upper mounting member 6. The straw tube a is placed between the lower mounting member 7 and the slide pin 9, as will be described later, by being elastically biased downward by an intervening spring 10 so as to be movable up and down.

Here, the upper mounting member 6 and the lower mounting member 7 are made of synthetic resin made of Teflon or the like, so that even if moisture condenses, the straw tube a will not become like a swimsuit, and both The mounting members 6 and 7 are supported on the guide rod 4 so that they can be relatively approached or separated, so that straw tubes of different lengths can be held.

That is, in the illustrated example, the lower mounting member 7 is fixed to the guide rod 4 with a set screw 11 etc., and the upper mounting member 6 is movable up and down and can be adjusted. A screw hole 13 that reaches the insertion hole 12 is provided horizontally through the screw hole 13, and a set screw 14 is screwed into the hole so that the screw hole 13 is fixed at a desired position moved up and down.

Furthermore, the through-mounting hole 8 and the slide pin 9 each have large diameter portions 8a, 9a at the bottom and small diameter portions 8b, 9b at the top.
As a result, a spring 10 is interposed between the downward step portion 8C of the mounting hole 8 and the shoulder portion 9C of the slide pin 9, so that the slide pin 9 can be slid against the upper mounting member 6. While elastically urging the pin 9 downward, a stopper 15 such as an O-ring to prevent falling is engaged with the protruding end of the small diameter portion 9b, so that the slide pin 9 is placed in the upper mounting member 6.
held at a predetermined height.

Further, it is preferable that the upper mounting member 6 supports a plurality of slide pins 9 as described above, and in this case, the mounting holes 8 are arranged on a virtual circumference line centered on the insertion hole 12.
. . . are provided at equal intervals and supported in each mounting hole 8 .

The receiving portion of the straw tube a in the lower mounting member 7 may be formed as a recessed hole 16 as shown in FIG.
As shown in the figure, when the recessed hole 16 is formed, which may be a simple smooth surface, it is shaped to have a diameter larger than that of the straw tube a so that it can be easily inserted.
6a should be opened for communication to avoid accumulation of the refrigerant f.

Further, the slide pin 9 has a penetrating shape through which a straw tube support insertion opening 17 having a downward opening and a through hole 18 having an upward opening communicate with each other at the center.

In this case, the diameter of the straw tube support insertion opening 17 is preferably made sufficiently larger than that of the straw tube a.

When the slide pin 9 is fixed in this manner, the upper end of the straw tube a can be inserted and supported in the insertion opening 17, so that the straw tube a does not come off and can be attached to the stopper for preventing falling. Since the slide pin 9 is fixed at a predetermined position by the slide pin 9, the elasticity of the spring 10 is not applied to the straw tube a through the slide pin 9, and therefore the tube a will not be bent.

A thermometer mounting cylinder 5 is provided on the cover plate 2 directly above the through hole 18 of the slide pin 9, and a thermometer is housed in this, and the temperature sensor is connected through the hole 18 to the straw tube a. It is attached to the pipe a so that the temperature inside the pipe a can be detected.

As explained above, the straw tube installation stand according to the present invention stores objects to be frozen, such as fertilized eggs and sperm, in the buffer solution in the straw tube a, and freezes them by holding them in the cryostat 1. In the straw tube installation stand used, an upper mounting member 6 and a lower mounting member 7 made of resin are attached to a guide rod 4 hanging vertically from a lid plate 2, and the upper mounting member 6 has a large diameter opening at the lower end. Part 8
A through-mounting hole 8 is vertically provided from a to a small-diameter portion 8b of the upper end opening via a downward step portion 8C, and a plastic straw tube holder is fitted into the hole 8 so as to be movable up and down. The slide pin 9 has a large-diameter portion 9a and a small-diameter portion 9b arranged in the large-diameter portion 8a and small-diameter portion 8b of the through-mounting hole 8, respectively. A spring 10 is clamped to the large diameter portion 8a of the through-hole 8 between the shoulder portion 9C provided at the shoulder portion 9C and the downward stepped portion 8°C, and the spring 10 is mounted to the small diameter portion 9b of the slide pin 9 for holding the straw tube. , the part protruding from the upper mounting member 6 is provided with a stopper 15 for preventing falling that abuts on the upper surface of the member 6 in normal conditions, and a through hole 18 with an upper end opening provided in the same diameter small part 9b and a large diameter The upper end of the straw tube a, which is placed upright on the lower mounting member 7, is pressed by the spring 10 of the slide pin 9 for holding the straw tube. The straw tube support insertion port 17 is opened by lifting and lowering against force.
Since the slide pin 9 can be inserted freely into the
is moved upward against the spring force, and after placing the straw tube a on the lower mounting member 7, by releasing the upward force of the slide pin 9, the slide pin 9 is lowered by the spring force and the straw tube a is placed on the lower mounting member 7. The upper end of the tube a is fitted into the straw tube support insertion opening 17, so that the elastic force of the spring 10 can hold the straw tube a without pressing it downward, and this allows the thin straw to be held. Not only can it be used with tubes without bending them, but since they are not in close contact, they are less prone to sticking due to freezing, and even when loading a large number of straw tubes, they can be easily inserted by simply repeating the above steps. In addition, since the straw tube support insertion port 17 and the through hole 18 are provided through the straw tube holding slide pin, a temperature sensor lead wire etc. can be inserted through these and the straw tube a It is also possible to detect the temperature inside.

In addition, since resin members are used in appropriate locations, problems caused by icing can be prevented as in the conventional case, and since both the upper and lower mounting members 6 and 7 are integrated with the lid plate 2, the low-temperature lid 1 It is convenient because the straw tube a can be easily removed and stored, and the lid can be opened and closed at the same time.

[Brief explanation of the drawing]

Figures 1 and 2 are vertical sectional views showing conventional straw tube installation stands, Figure 3 is a vertical sectional side view showing the straw tube installation stand according to the present invention together with a cryostat, and Figure 4 is the same. FIG. 3 is an enlarged longitudinal cross-sectional side view showing the main parts of the installation stand. 1...Low temperature chamber, 2...Lid plate, 4...
...Guide rod, 6...Top mounting member, 7...
...Lower mounting member, 8...Through mounting hole, 8
a... Large diameter part of through-mounting hole, 8b...
Small diameter part of through-mounting hole, 8C...Downward stepped part, 9
...Slide pin for holding straw tube, 9a...
...Large diameter part, 9b... Small diameter part, 9C...
...Shoulder, 10...Spring, 15...
Stopper for preventing falling, 17...Insertion port for supporting straw tube, 18...Through hole, 9...Straw tube.

Claims (3)

[Scope of utility model registration request] (1) A straw tube installation stand used to store objects to be frozen, such as fertilized eggs and sperm, in a buffer solution in a straw tube, and to hold and freeze them in a cryostat. An upper mounting member and a lower mounting member made of synthetic resin are attached to a vertically installed guide rod, and the upper mounting member is connected to a small diameter portion of the upper end opening via a downward stepped portion from a large diameter portion of the lower end opening. The slide pin for holding the straw tube, which is made of plastic and is fitted vertically into the through-mounting hole so as to be able to move up and down, has a through-hole installed in the large-diameter part and the small-diameter part of the through-mounting hole, respectively. A straw tube is held by attaching a spring to the shoulder provided between the two parts and the large diameter part of the through-mounting hole located between the downward stepped part. The part of the slide pin with a small diameter that protrudes from the upper mounting member is provided with a drop-preventing stopper that comes into contact with the top surface of the member during normal times, and a stopper is provided at the small diameter part of the slide pin to prevent it from falling. The hole communicates with the insertion hole for supporting the straw tube which is opened at the lower end provided in the large diameter part, and the upper end of the straw tube placed upright on the lower mounting member is pressed by the spring of the slide pin for holding the straw tube. A straw tube installation stand that can be freely inserted into the straw tube support insertion opening by lifting and lowering against force. (2) The straw tube installation stand according to claim 1, wherein the upper mounting member is configured to be movable and adjustable in the vertical direction with respect to the guide rod. (3) The straw pipe installation stand according to claim 1, wherein the lower mounting member is made of synthetic resin.