JPH0520437Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a test tube rack capable of stably holding test tubes.

(Prior Art) As a prior art of the test tube stand, there was one described in the specification and drawings of Japanese Utility Model Publication No. 35234/1983, which was previously filed by the inventor of the present invention.

The test tube stand according to this prior art includes rectangular frame-shaped left and right support legs, an upper grid body and a lower grid body for test tube compartments, and a bottom frame that supports the bottom of the test tubes. An upper support shaft, a lower support shaft, and a bottom support shaft are fixed horizontally to the upper part, lower part, and bottom of each of the support legs, and the upper lattice body, the lower lattice body, and the bottom can be opened and closed on each of these support shafts. It has a structure in which a holding rod is attached to connect the left and right support legs and hold the opening angles of the upper lattice body, the lower lattice body, and the bottom frame at right angles, for example, for packaging and transportation during transportation. When stored, the left and right support legs are laid down in a parallel link shape, and the upper and lower lattice bodies are folded over the bottom frame to reduce the bulk.When in use, the support legs are erected and the holding rods are used to maintain the erect state. The test tube was held so that the bottom part of the test tube was supported by the bottom frame, and the middle part of the test tube was supported in an upright state by both lattice bodies.

(Problems to be Solved by the Invention) By the way, when the present inventor created a test tube rack according to the configuration of the prior art described above, it was found that the following problems occurred.

That is, in the case of this prior art, as mentioned above, in order to stably support the upright state of the test tube during use, the middle part of the test tube is supported by a lattice body of two stages, upper and lower. This is because the peripheral wall of a round test tube is supported in a loosely fitted manner within a square lattice, so the test tube cannot be stably held unless at least two areas in the middle of the test tube's circumference are supported. It is.

By the way, the lattice body is usually made by vertically and horizontally assembling wire rods made of high-grade steel that does not easily rust, such as stainless steel, and welding the intersections of the vertical and horizontal wire rods, so it is quite expensive. This 2
The prior art test tube racks, which require a large number of sheets, are inevitably expensive.

In addition, in the case of a type that is foldable using parallel links, as in this prior art, if the support legs are not completely erected, the upper and lower lattice bodies will be misaligned, and the inserted test tube will be tilted diagonally. There was also the inconvenience of being supported.

The purpose of the present invention is to address these conventional problems and provide a test tube rack that has a simple structure and can be produced at a relatively low cost, while also being able to stably hold test tubes. That is.

(Means for Solving the Problems) The characteristic structure of the present invention to achieve such an objective is that it includes a substantially rectangular base, a pair of side frames erected at both ends of the base, and side frames on both sides. In a test tube stand consisting of a test tube support plate installed between them, the support plate is formed of a metal flat plate, and a plurality of test tube holding holes are formed in this support plate, and the peripheral edge of each test tube holding hole is A plurality of metal elastic tongues that elastically hold the circumferential surface of the test tube A are extended from the holding hole toward the inside and downward, and the lower ends of these metal elastic tongues are tilted diagonally outward. It has a structure in which it is bent towards the front.

(Function) In the test tube stand of the present invention having the characteristic structure as described above, by inserting a test tube into the test tube holding hole, each elastic tongue piece comes into elastic contact with the middle part of the circumference of the test tube, This will stably support the test tube in a vertically erected state. In this case, since the elastic tongue piece is made of a metal material, the opening degree of the holding hole is fixed almost as set, so the contact pressure against the circumferential surface of the test tube is maintained constant, and even after repeated use. Even if the elastic tongue is bent, the elastic tongue does not sag, and the contact pressure for supporting the test tube can be maintained well, and since the lower end of the elastic tongue is bent diagonally outward, Even though the tube is made of metal, the test tube can be removed smoothly without being damaged.

For example, when this configuration is applied to a collapsible test tube stand using parallel links, the direction of test tube support by the elastic tongues is maintained vertically, regardless of the inclination of the side frame in its standing position. The test tube is always supported in a vertical standing position.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings. The test tube stand of this embodiment shown in FIGS. 1 to 5 has a pair of side frames 2, 2 provided at both ends in the longitudinal direction of a substantially rectangular base 1.
A test tube support plate 3 is removably installed at a position near the upper end between the test tubes 2 and 3, and the entire structure is made of a metal material such as stainless steel that does not easily rust.

are arranged parallel to each other, and a metal bottom support member 5 for supporting the bottom of the test tube A is stretched between the side plates 4, 4, and pivot rods 6, 6 made of wire rods are provided at both ends of each side plate 4. is rotatably mounted, and regulating rods 7, 7 are fixed between the upper sides of adjacent side plates 4, 4 inside each pivot rod 6, 6.

Each of the side frames 2 is formed by bending a wire rod into a gate shape to form an upper side 2.
a and side portions 2b, 2b are formed in series, and the lower ends of both side portions 2b, 2b are each integrally fixed to the pivot rod 6, whereby the side portions 2b, 2b are integrally fixed. The frames 2, 2 are free to rotate around the pivot rod 6 on the outside of the base 1, and are restricted from rotating on the inside of the base 1 by the restriction rod 7. Therefore, when each side frame 2 is laid down, it is done by rotating it to the outside of the base 1, and when raised, each side frame 2 is in a vertically erected state, and the lower end portion near the pivot rod 6 is It comes into contact with the regulating rod 7 and is prevented from falling further inward.

Further, a connecting rod 9 made of a wire material for installing the test tube support plate 3 is attached to the intermediate portion of the side portions 2b, 2b of each of the side frames 2 near the upper end, and a connecting rod 9 made of a wire rod for installing the test tube support plate 3 is installed. A support plate 3 is removably installed over the rods 9, 9.

This test tube support plate 3 is made of a rectangular flat stainless steel plate, and is integrally formed with hook-shaped hook portions 10, 10 bent downward at both ends in the longitudinal direction. By hooking it to the rods 9, it is constructed between the side frames 2, 2. This support plate 3 has a predetermined number of test tube holding holes 11 arranged vertically and horizontally. In FIGS. 1 and 4, the formation positions of the holding holes 11 are partially indicated by + marks, and the detailed structure thereof is omitted. As shown in FIG. 5, each of the holding holes 11...
are formed by making, for example, four notches radially in the hole forming position of the support plate 3, and the tongue pieces 12 between each notch are bent at an appropriate inclination angle toward the inside and downward of the holding hole 11. As a result, the circumferential surface of the test tube A inserted into the holding hole 11 is held in elastic contact with each tongue piece 12 with uniform contact pressure.

Incidentally, since each of the elastic tongues 12 is made of a metal piece, there is a risk that the test tube A will break if the corner of the tip hits the test tube A. For this reason, the tip that comes into contact with the test tube A is bent diagonally outward, and by sliding the test tube A into contact with this bent inner surface, damage to the test tube A can be prevented and it can be easily removed. We make sure that things run smoothly.

In the above configuration, the wire rods and plate members are usually joined together using a method such as spot welding.

When the test tube stand of this embodiment constructed as described above is used, the both side frames 2, 2 are erected, and the hooks 10 of the support plate 3 are hooked to the connecting rods 9, 9 to support the test tubes. The board 3 is erected between the crossing rods 9, 9, and at this time, the both side frames 2, 2 are completely erected at right angles to the base 1, being prevented from falling inward by the regulating rods 7, 7. Fixed.

In this standing posture, when the test tube A is placed in the holding hole 11, a uniform contact pressure is applied by each of the elastic tongues 12 to the middle part of the circumferential surface of the test tube A, and the test tube A is supported in the vertical standing posture. At the same time, its bottom part is received and supported by the bottom support member 5 of the base 1, and is stably supported.

Also, when not in use, each ferry rod 9, 9 and hook part 1
0 and 10, rotate the both side frames 2 and 2 to the back side of the base 1 and fold them, and then remove the support plate 3.
By stacking them on the base 1, the bulk can be reduced, thereby increasing space efficiency during transportation and storage.

In the above embodiment, several types of support plates 3 with different diameters of holding holes 11 are prepared to correspond to various test tubes A with different tube diameters, and they can be replaced with suitable support plates 3 as necessary. I can do it.

In addition to the case where the support plate 3 is removable, there are also so-called fixed test tube stands in which the base 1, the side frames 2, 2, and the support plate 3 are fixed to each other inseparably, and the support plate 3 is made detachable. The present invention can also be applied to a prefabricated test tube stand in which only one side can be attached to and removed from the opposing side frame 2, or to a collapsible parallel link type test tube stand as in the conventional example. .

When the present invention is applied to this parallel link type test tube stand, even if the side frame is not completely perpendicular to the base and the test tube is in an incomplete upright position, the test tubes can be held at each of the elastic tongues 12 in the holding hole 11. supported vertically by...
It does not affect the support state in any way.

(Effects of the invention) As explained above, according to the invention, the test tube support plate installed between the side frames erected at both ends of the base is formed of a metal flat plate, and this support plate is A plurality of test tube holding holes are formed, and a plurality of metal elastic tongues are provided extending from the periphery of each test tube holding hole toward the inside and downward of the holding hole to elastically hold the circumferential surface of the test tube. Since each elastic tongue is slanted inwardly and downwardly from the periphery of the holding hole, the elastic tongue easily expands when inserting the test tube, allowing for smooth insertion. In addition, the inclined surface of the elastic tongue allows the test tube to be inserted while aligning the center of the test tube with the center of the holding hole, and the plurality of elastic tongues can be uniformly brought into elastic contact with the circumferential surface of the test tube. It is capable of stably supporting the pipe in a vertical standing position.

Furthermore, since the elastic tongue piece is made of metal, it can maintain its elasticity over a long period of time without becoming fatigued even after repeated use, and there is almost no risk of deformation, so the test tube can be used without causing unnecessary movement. It can be held reliably with constant elastic contact force at all times.

In addition, since the lower end of the elastic tongue is bent diagonally outward, the test tube is not damaged by the elastic tongue even though the elastic tongue is made of metal. This enables a state of elastic contact and allows for smooth removal of the test tube.

Furthermore, when the test tube stand of the present invention is applied to a foldable test tube stand using parallel links, for example, the direction of test tube support by the elastic tongues is vertical, regardless of the inclination of the side frame in the upright position. Since it maintains its orientation, it has achieved excellent practical effects, such as not interfering with supporting the test tube.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the test tube rack according to the present invention, in which Figure 1 is a partially cutaway plan view, Figure 2 is a vertical front view, Figure 3 is a side view, and Figure 4 is a side view. The figure is an exploded perspective view, and FIG. 5 is a vertical cross-sectional view of a main part showing how the test tube is held in the test tube holding hole. DESCRIPTION OF SYMBOLS 1... Base, 2... Side frame, 3... Test tube support plate, 11... Test tube holding hole, 12... Elastic tongue piece,
A...Test tube.

Claims (1)

[Scope of utility model registration request] In a test tube stand consisting of a substantially rectangular base 1, a pair of side frames 2, 2 erected at both ends thereof, and a test tube support plate 3 installed between both side frames 2, 2, the support The plate 3 is formed of a flat metal plate, and the support plate 3 is provided with a plurality of test tube holding holes 11...
, and a plurality of metal elastic tongues 12 that elastically hold the circumferential surface of the test tube A, which are inclined from the periphery of each test tube holding hole 11 downward toward the inside of the holding hole 11... These metal elastic tongue pieces 12
A test tube stand characterized by having a lower end bent diagonally outward.