JPH0117404B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suction device for suctioning various samples (liquids to be analysed) in physical and chemical experiments and the like.

This type of suction device consists of a funnel and a suction device, and currently, the suction device shown in FIG. 10 is generally used. That is, as shown in Figure 10, the conventional overfunnel is formed separately from the funnel 1 inside the funnel 1 with the outflow pipe 2 protruding from the bottom.
A perforated plate 3 having a large number of small holes 4 is inserted therein, a paper 5 is placed on the upper surface of the perforated plate 3, and the sample introduced into the funnel 1 is sucked through. It had the following problems. That is, firstly, it takes time and effort to fit and store the perforated plate 3 in the funnel 1, and secondly, since the sample is often contaminated with chemicals, etc., the perforated plate 3 The glass plate is made of glass, and the work of drilling a large number of small holes in this glass plate is very complicated, and the plate is often damaged during the drilling process. Furthermore, the perforated plate 3 may shake during suction, allowing impurities to be mixed in and flow out from the surrounding area, and the perforated plate 3 must be removed when cleaning the inside of the funnel 1 after use. .

In addition, as shown in the figure, the conventional suction device has a bell-shaped pressure reducing device 6, which has a funnel receiving portion 7 on the top and a suction port pipe 8 on the side wall, and the lower opening end of the bell-shaped pressure reducing device 6 is bent outward to form an annular shape. It is made of transparent glass with an integrally formed flange piece 9.
To use this, put sand between the glass base plate 10 and the flange piece 9 placed at the bottom of the pressure reducer 6, rub them together, and then put grease between them to make them stick.
The pressure reducer 6 was kept stable during use, and the inside of the pressure reducer 6 was isolated from outside air.

However, the above-mentioned rubbing work is complicated and must be done every time it is used.Also, since grease is used, the pressure reducer 6 gets dirty, and furthermore, the grease dries and the stand is removed after use. It was sometimes impossible to remove the pressure reducer 6 from the plate 10, and furthermore, the work of forming the flange piece 9 was time-consuming.

The present invention has focused on the above points and aims to provide a suction device that solves the problems of the conventional products.

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings. The suction device of the present invention, as shown in FIG.
The inside of the aspirator a is suctioned and depressurized by a suction pump P such as a water pump, a vacuum pump, etc., and the sample in the overflow funnel b is sucked into the aspirator a, and then transferred to the collection container c arranged in the aspirator. This is to collect excess liquid.

The suction device a includes a bell-shaped vacuum chamber 11 made of transparent glass. The decompression chamber 11 has a funnel socket 12 in the upper part, and a suction port pipe 13 is provided in an appropriate part such as the side wall. Lower end 14 of decompression chamber 11
is opened as shown in FIG. 2, and the lower end of the opening expands outward in a conical shape. When expanding the diameter of the lower end, the vicinity of the lower end of the decompression chamber 11 is once squeezed into an annular shape. An annular recess 15 is formed, and this recess 1
The lower end of 5 is expanded outward into a conical shape. When the annular recess 15 is formed in this manner, the lower end side of the decompression chamber 11 is reinforced and made robust, and the diameter of the lower end 14 is expanded to stabilize the engagement with the pedestal board, which will be described later.

Reference numeral 16 designates a pedestal board made of rubber, and the center part of the pedestal board 16 is formed into a ring shape with a circular hole 17 formed therein. A matching fitting portion 18 is provided and fitted to the lower end 14. The pedestal board 16 is strongly engaged due to the synergistic effect of the elasticity of its material and the enlarged diameter of the lower end 14, so that the pedestal board 16 will not come off inadvertently during use. A plurality of ring-shaped protrusions are provided on the bottom surface of the pedestal board 16, and in the embodiment, four ring-shaped protrusions 19a, 19b, 19c, 1
9d, and the inner protrusion 19a and the outer protrusion 19d are formed slightly higher than the two central protrusions 19b and 19c, so as to enhance the action of the suction cup and the stabilizing action of the suction device a. be. Also pedestal board 1
6 is made of rubber material such as synthetic rubber material that can withstand chemicals. Reference numeral 20 denotes a glass base plate placed under the suction device a, and the collection container c is placed on the base plate 20 and accommodated in the decompression chamber 11.

Therefore, the suction device a is placed on the base plate 20, the suction pump P and the suction port pipe 13 of the decompression chamber 11 are connected with the connecting pipe H (see Fig. 1), and when the pump P is driven, the decompression chamber The inside of the chamber 11 is depressurized by suction, and the pressure inside the chamber 11 is reduced by suction.
acts to be pressed downward, so the protrusions 19a and 19d on both sides provided at the bottom of the pedestal board 16 act as suction cups, and when the pressure inside the decompression chamber 11 is further reduced, the two protrusions in the middle The strips 19b and 19c act as suction cups. In this way, the inside of the decompression chamber 11 and the outside air can be completely shut off and suction can be performed, and during suction,
The stability of the suction device a can be maintained.

Next, the structure etc. of the overfunnel b will be explained. FIG. 4 is a plan view of the overflow funnel b shown in FIG. 1, and FIG. 5 is a longitudinal sectional view thereof. The over funnel b is made of transparent glass, and 21 is a cylindrical over body with an open upper end.The inside bottom surface 22 of the over funnel body 21 is formed in a horizontal plane, and a An outflow hole 23 is bored, and an outflow pipe 24 of an appropriate length, which is connected to the outflow hole 23, is provided at the lower part of the vessel body 21 and projects downward. The internal bottom surface 22 of the filter body 21 has an outflow hole 2.
It forms a groove that communicates with the fourth
In the embodiment shown in FIGS. 5 and 5, an arbitrary number (three in the figure) of annular grooves 25 are carved to surround the outflow hole 23, and radial connecting grooves 26 are formed to connect each groove 25 and the outflow hole 23. are engraved to form overgrooves.
As a result, various samples (liquids to be filtrated) placed in the filter body 21 are passed through the annular groove 25 and the connecting groove 26 through the paper 27 spread on the bottom surface 22 as shown in FIG. It flows out through the groove 26 from the central outflow hole 23 to the outflow pipe 24 .
The overfunnel b is removably tightly fitted into the funnel socket 12 of the decompression chamber 11 so that the lower end 28 of the outflow pipe 24 is located within the collection container c housed in the decompression chamber 11. In the above-described embodiment, a joint portion 29 is formed on the base side of the outflow pipe 24, and the joint portion 29 bulges out from the outflow pipe 24 and is tapered downward. The inner wall surface of the funnel socket 12 is rubbed against the inner wall surface of the funnel socket 12 so as to be tightly fitted in a removable manner. In this case, as a means for fitting the overfunnel b into the funnel socket 12, for example, as shown in FIG. The funnel socket 12 may be tightly fitted into the outflow hole 24a protruding from the bottom of the funnel 21, and may be fitted using a stopper 29a made of rubber or the like with an insertion hole formed in the center. .

FIG. 7 is a plan view showing another embodiment of the overflow funnel b. In this embodiment, the internal bottom surface 2 of the overflow funnel 21 is
2 (this bottom surface 22 is also formed in the shape of a horizontal surface), radial grooves 26a connected to the central outflow hole 23 and branch grooves 25a are carved in the shape of a tree branch to constitute an overgroove. As a result, the excess liquid is removed from the grooves 25a and 26a.
It flows out through the outflow hole 23 to the lower part.

FIG. 8 is a plan view showing still another embodiment of the overflow funnel b. In this embodiment, over one surface of the internal bottom surface 22 (this bottom surface 22 is also formed in a horizontal plane shape) of the overflow funnel body 21, A large number of small convex portions 26b are scattered, thereby forming a passageway 26c (passage groove) communicating with the central outflow hole 23 between each convexity 26b, and the liquid flows from the outflow hole 23 through the passageway 26c. It is configured so that it flows out to the bottom.

Note that the groove formed on the inner bottom surface 22 of the tube body 21 is not limited to the form of the above-mentioned embodiment, but can be arbitrarily changed to a spiral shape, a flower-shaped pattern, or other shapes. In short, it is sufficient to carve a groove in the bottom surface 22 that communicates with the central outflow hole 21.

The present invention is constructed as described above, and as shown in the first figure, the overfunnel b is tightly fitted into the funnel socket 12 of the suction device a, the inside of the decompression chamber 11 is depressurized by the pump P, and the overfunnel body 21 is Place the sample inside the paper 27
The superfluous liquid is collected in a collection container c placed inside the decompression chamber 11.

The device of the present invention consists of an overfunnel and a suction,
As mentioned above, the overfunnel is formed into a cylindrical shape with an open upper end, and has an outflow hole at the center of the inner bottom surface, and a lower part of the overflow body has an overflow hole around the outflow hole that communicates with the outflow hole. It is constructed by protruding an outflow pipe connected to an outflow hole. Therefore, unlike conventional products, the perforation plate is not separately formed, but the perforation plate is provided directly on the internal bottom of the container body, so the structure is simple, mass production is possible by stamping, and the perforation plate is Since no rubber is used, there is no risk of the surface becoming loose and cleaning is easy.

In addition, the suction device has a funnel socket and a suction port pipe, and is formed into a ring shape with the center hollowed out at the lower end of the opening of the bell-shaped transparent glass vacuum chamber, and the top surface of the vacuum chamber is hollowed out. A fitting portion is provided at the lower end, and a rubber pedestal board is fitted on the bottom surface of the rubber base plate, which has a plurality of annular protrusions formed thereon. Therefore, unlike conventional products, there is no need to rub the base plate and the suction device together, and since no grease is used, there is no dirt, and the suction device can be used immediately by simply placing it on the base plate. The plurality of annular protrusions formed on the bottom of the pedestal board act as a suction cup during depressurization in the decompression chamber to completely isolate the chamber from outside air and have the effect of maintaining the stability of the suction device.

[Brief explanation of drawings]

FIG. 1 is a side view of a suction device according to the present invention;
Fig. 2 is an enlarged vertical cross-sectional view of the lower end of the suction device taken along line l-l in Fig. 1, Fig. 3 is a bottom view of the elastic pedestal of the suction device, and Fig. 4 is a plan view of the overfunnel. Figure 5 is a vertical cross-sectional view of the through funnel, Figure 6 is an enlarged vertical cross-sectional view of the main parts of the through funnel, and shows the state in which paper is placed.
Fig. 8 is a plan view showing different embodiments of the overface of the overfunnel, Fig. 9 is a side view showing another embodiment of the fitting part of the overfunnel, and Fig. 10 is a conventional suction device. FIG. a... Suction device, b... Over funnel, c... Collection container, P... Suction pump, 11... Decompression chamber, 12
... funnel socket, 13 ... suction port pipe, 14 ... lower end of opening, 16 ... pedestal board, 17 ... circular hole, 18 ...
...Fitting part, 19a, 19b, 19c, 19d...
Annular protrusion, 21... Overbody, 22... Internal bottom surface, 23... Outflow hole, 24, 24a... Outflow pipe,
25... Annular groove, 25a... Branch groove, 26... Connection groove, 26a... Radial groove, 26b... Small convex portion, 2
6c...pass passage, 27...paper, 28...lower end, 29...joint portion, 29a...rubber stopper.

Claims (1)

[Claims] 1 (a) The above-mentioned container body is formed in a cylindrical shape with an open upper end, has an outflow hole at the center of the inner bottom, and has a groove communicating with the outflow hole formed around the outflow hole. At the lower end of the opening of the transparent glass decompression chamber formed in the shape of a bell, it has a transparent glass overfunnel with an outflow pipe connected to the outflow hole protruding, (b) a funnel socket, and a suction port pipe. It is formed into a ring shape with a hollowed-out center part, and has a fitting part on the top surface that fits into the lower end of the decompression chamber, and a rubber pedestal board with a plurality of annular protrusions formed on the bottom surface. The outflow pipe of the overfunnel is removably tightly fitted into the funnel socket of the aspirator, and the sample inside the overfunnel is aspirated by reducing the pressure in the vacuum chamber. A suction device characterized by: