JPS6222845Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a dispenser with an adapter, and more specifically, it is possible to selectively use several types of adapters that are respectively adapted to several sizes of taper openings of bottles or flasks. Regarding a dispenser with an adapter.

A dispenser is used to dispense liquid reagents or drugs from bottles or flasks into test tubes, etc. in the desired amount during various chemical experiments and researches, medical tests and research, etc. Conventionally, there are two types of dispensers: one with a screw cap that fits the screw cap of a bottle or flask, and the other with a taper plug that fits the tapered neck of a bottle or flask. The dispenser is, for example, as shown in FIG.

In Figure 1, the dispenser with a taper plug is
It has a main pipe 1, a suction pipe 2 extending downward from the lower end of the main pipe 1, and a dispensing pipe 3 branching laterally from the lower end of the main pipe 1, and the upper end side of the suction pipe 2. An air introduction pipe 4 is provided which has an upper opening 4a on the side, extends downward around the outer periphery of the suction pipe 2, and has a lower opening 4b outside the middle part of the suction pipe 2, and has a plunger 5 inside the main pipe 1. is slidably inserted.

This dispenser with a taper plug is attached to a bottle or flask 6, and for this purpose a taper plug 7 is integrally provided extending downward from the lower end of the air introduction pipe 4. However, some of these dispensers with taper plugs have taper ports of several sizes on the bottle or flask 6, so taper plugs that fit each of the taper ports of the bottle or flask are integrally provided. It was necessary to have several types of dispensers on hand.

The present invention was made to solve this problem, and includes a main pipe, a suction pipe extending downward from the lower end of the main pipe, and a dispensing pipe branching laterally from the lower end of the main pipe. and a plunger is slidably inserted into the main pipe, a screw cap rotatably attached to the outside of the intermediate portion of the suction pipe and provided with an internal thread; Several types of adapters are provided at the upper end with an external thread that can be screwed into the internal thread of the screw cap, and whose outer periphery is formed into a tapered shape to fit the tapered mouth of several sizes of bottles or flasks. and when attaching the dispenser to a bottle or flask, the screw cap can be selectively combined with an adapter that is compatible with the tapered mouth of the bottle or flask from among the several adapters described above. It is something that has become popular.

An embodiment of the dispenser with adapter according to the present invention will be described below with reference to FIG.

11 is a main pipe, 12 is a suction pipe, and 13 is a dispensing pipe. The suction pipe 12 extends downward from the lower end of the main pipe 11, and the dispensing pipe 13 extends laterally from the lower end of the main pipe 11. It is branched. An inlet valve 14 is provided in the middle of the suction pipe 12 to allow only liquid suction and prevent backflow.A tip tube 12a is attached to the tip of the suction pipe 12. An outlet valve 15 is provided inside the middle to allow only discharge of liquid and prevent backflow, and a tip tube 13a is attached to the distal end of the dispensing tube 13. The outer peripheral surface of the main tube 11 is marked with a scale indicating the amount to be dispensed at one time through the dispensing tube 13.

Reference numeral 16 denotes an air introduction pipe, which has an upper opening 16a on the side of the upper end of the suction pipe 12, extends downward around the outer periphery of the suction pipe 12, and has a lower opening 16b outside the middle part of the suction pipe 12. This air introduction pipe also serves as an injection port for replenishing liquid into a bottle or flask, which will be described later. 20 is a plunger;
A cap 21 is fixed to its upper end, a plunger 20 is slidably inserted into the main pipe 11, and a washer 22 is inserted between the lower surface of the cap 21 and the upper end surface of the main pipe 11. Further, a guide rod 23 fixed to the protruding portion of the cap 21 extends downward along the outside of the main pipe 11, and a pointer flange stopper 24 is fixed to the lower end of the guide rod 23. It is slidably fitted between the lower surface and the stopper 24 and fixed at a desired position by a pointer flange set screw 26.

This dispenser can be used in bottles or flasks.
In this embodiment, the dispenser is attached to the Erlenmeyer flask 30. In order to attach the dispenser to the Erlenmeyer flask 30, a screw cap 31 with an internal thread is attached to the outer flange of the lower end of the air introduction tube 16. It is rotatably attached to the washer 32 via a washer 32, and a screw cap 3 is separately attached to the upper end.
Several types of adapters 33 are prepared, each having an external thread that can be screwed into the internal thread of No. When attaching the injection device to the Erlenmeyer flask 30, select the adapter 33 that fits the taper mouth of the Erlenmeyer flask from among the several types of adapters mentioned above, and attach the adapter 33 to the screw cap 31 with the washer 34. The adapter 33 is fitted into the tapered mouth of the Erlenmeyer flask 30 and fixed with a clip 35 so as not to separate from the Erlenmeyer flask 30. It is.

FIG. 3 shows the air introduction pipe 16 of the embodiment shown in FIG.
This is an example of a change that does not require
It is the same as that shown in FIG. 2 except that the air introduction pipe 16 shown in the figure is not provided, and this modified example has an air introduction groove 40a vertically provided on the tapered outer peripheral surface of the adapter 40. Air is introduced into the Erlenmeyer flask through the air introduction groove.

FIG. 4 also shows the clip 35 of the embodiment shown in FIG.
This is a modification example that does not require a A ring 41a is attached so that when the adapter 41 is attached to the tapered mouth of the Erlenmeyer flask, it will not come off due to the friction of the O-ring 41a.

The operation of the dispenser with adapter according to the present invention is as follows. Dispenser into Erlenmeyer flask 3
0, first select the adapter 33 that fits the tapered mouth of the Erlenmeyer flask, screw it onto the screw cap 31, and attach it to the screw cap 31. Then, insert the tip of the suction tube 12 and the tip tube 12a into the Erlenmeyer flask. Insert the adapter 33 into the tapered mouth of the Erlenmeyer flask.

When dispensing the liquid in the Erlenmeyer flask 30 to a desired amount using the dispenser, first align the pointer flange 25 with the scale marked on the outer circumferential surface of the main pipe 11, and then adjust the pointer flange stopper. screw 26
It is fixed to the guide rod 23 by a screw. The plunger 20 and cap 21 are then pulled up until the pointer flange 25 abuts the outward flange at the upper end of the main pipe 11, and the metered liquid flows into the suction pipe 1.
The air is drawn into the upper end of the suction pipe 12 and into the main pipe 11 through an inlet valve 14 provided in the suction pipe 12 . Then, attach the plunger 20 to the cap 21.
When the washer 22 is pressed down until it contacts the upper end surface of the main tube 11, the measured liquid passes through the outlet valve 15 provided in the dispensing tube 13 and the tip tube 13a and enters the dispensing device. dispense to the outside.

The dispenser with an adapter according to the present invention can be used to attach the dispenser to a bottle or flask using several types of adapters whose outer periphery is tapered to fit the tapered opening of the bottle or flask with different sizes. Since it is now possible to selectively combine adapters that fit the tapered mouth of the bottle or flask, it is possible to use several types of dispensers each equipped with several types of taper plugs. It has the advantage that it is not necessary to keep it on hand, and only one dispenser needs to be kept on hand.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional front view of a conventional dispenser with a taper plug, Fig. 2 is a longitudinal cross-sectional front view of an embodiment of the dispenser with an adapter according to the present invention, and Fig. 3 is a longitudinal cross-sectional front view of the embodiment of the dispenser with an adapter according to the present invention. FIG. 4 is a partial vertical sectional front view of a modified example that does not require an air introduction pipe, and FIG. 4 is a vertical sectional front view of a modified example of the adapter of the embodiment shown in FIG. 1...Main pipe, 2...Suction pipe, 3...Dispensing pipe, 4
...Air introduction pipe, 5...Plunger, 6...Bottle or flask, 7...Taper plug, 1
1...Main pipe, 12...Suction pipe, 13...Dispensing pipe,
14... Inlet valve, 15... Outlet valve, 16... Air introduction pipe, 20... Plunger, 21... Cap, 23... Guide rod, 2
5... Pointer flange, 30... Erlenmeyer flask, 31... Screw cap, 33... Adapter, 40... Adapter, 40a... Air introduction groove, 41... Adapter, 41a... O-ring.

Claims (1)

[Scope of utility model registration request] It has a main pipe, a suction pipe extending downward from the lower end of the main pipe, and a dispensing pipe branching laterally from the lower end of the main pipe, and a plunger is slidably inside the main pipe. In the inserted dispenser, there is a screw cap which is rotatably attached to the outside of the middle part of the suction tube and has an internal thread, and an outer screw cap which is screwed into the internal thread of the screw cap at the upper end. Several types of adapters are provided with threads and whose outer periphery is formed into a tapered shape to fit various sizes of tapered openings of bottles or flasks, and when the dispenser is attached to a bottle or flask, the above-mentioned 1. A dispenser with an adapter, characterized in that the screw cap can be used in selective combination with an adapter suitable for the tapered mouth of the bottle or flask from among the several types of adapters described above.