JPH09327518A - Joint for liquid feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint capable of being detached from a container side pipe without leaking a chemical requiring caution in handling due to toxicity and stimulation to the outside by a backflow or the like at the time of detaching the container side pipe. SOLUTION: This joint is composed of an upper joint 11 for connecting a suction pump, a lower joint 31 for connecting the container side pipe 3 and a nut 21 for connectably and detachably connecting the joint 11 and the joint 31. On both upper and lower ends of the joint 11 in a cylindrical shape, ball valve seats 16 and 17 and ball valves 18 and 19 for making liquid flow in a transfer direction and preventing the backflow are provided. The nut 21 is made rotatable so as to cover the joint 11 and is locked and stationed in the nut station part 14 of the joint 11, an inner screw is provided in a lower joint screw fastening part 24 and an O ring 36 is interposed between the joints 11 and 31 so as to air-tightly connect the joint 11 and the joint 31. An outer screw is provided in the upper connection part of the joint 31, the screw and the inner screw 26 of the nut 21 are screwed, the nut 21 is rotated in a loosening direction and the joint 31 and the pipe 3 are detached.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention transfers a liquid contained in a container, mainly a drug which requires careful handling due to its toxicity, irritation, etc., from a container to its intended place using a liquid delivery device. After that, the present invention relates to a joint for a liquid feeding device for safely and easily disconnecting a pipe such as a hose that has been inserted into a container and used for transfer.

[0002]

2. Description of the Related Art Conventionally, a liquid contained in a container, mainly a drug which requires careful handling due to its toxicity and irritation, is quantitatively transferred directly from the container and safely to a desired destination. A liquid feeding device using an injection tool for this purpose is known, for example, from Japanese Patent Application Laid-Open No. 7-247957.

[0003]

However, a pipe such as a hose inserted into a container and used for transferring the medicine is dangerous unless the pipe is left as it is in the container. Therefore, in the liquid sending device, a joint for the liquid sending device is required to safely and easily disconnect the container side pipe. Regarding this joint, when the pipe is disconnected, there are problems that the drug leaks out due to backflow, etc., and the joint cannot be easily separated.
There is a problem that pipes such as hoses cannot be safely and easily separated.

In order to solve the above-mentioned problems and problems, the present invention uses a joint for a liquid feeding device which connects a pipe on the container side and a suction pump which feeds liquid to a target location, and is toxic when the pipe on the container side is cut off. Drugs that require careful handling due to irritation, irritation, etc., can be easily separated without leaking to the outside due to backflow, etc. It is an object of the present invention to provide a new joint for a liquid feeding device that is free from the risk of leakage.

[0005]

In order to achieve the above-mentioned object, a joint for a liquid sending device of the present invention comprises an upper joint for connecting a suction pump, a lower joint for connecting a container side pipe, and these upper joint and lower joint. And a nut that connects and disconnects with each other.A ball valve seat and a ball valve are provided at the upper and lower ends of a cylindrical upper joint to prevent liquid from flowing in the transfer direction and prevent backflow. Is rotatable so as to cover the upper joint, and is locked and retained by the nut retaining portion of the upper joint, and an internal thread is provided in the screw retaining portion of the lower joint, so that the upper joint and the lower joint are airtight. An O-ring is interposed between the upper joint and the lower joint to connect the upper joint to the lower joint, and an outer screw is provided on the upper joint of the lower joint, and the outer screw and the inner screw of the nut are screwed together. , Rotate in the direction to loosen the nut. Characterized in that to be able to leave the lower joint and the container side pipe by.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view of a cross section of a joint structure of a joint for a liquid delivery device of the present invention. The joint 1 of the present invention comprises an upper joint 11 having a roughly cylindrical shape.
It is composed of a nut 21 and a lower joint 31. The upper joint 11 includes a pipe connecting portion 12, a main body portion 13,
It is composed of the nut retaining portion 14 and the lower joint connecting portion 15, and the pipe connecting portion 12, the main body main portion 13, the nut retaining portion 14 and the lower joint connecting portion 15 are all cylindrical with the same diameter. The pipe connecting portion 12 and the lower joint connecting portion 15 are respectively provided with ball valve seats 16 and 17 facing downward. On the ball valve seats 16 and 17, the ball valves 18 and 1 are provided.
9 is placed so that its spherical surface is in contact. Further, the pipe connecting portion 12 is connected to a transfer pipe 2 which is connected to a pump (not shown). At the nut retaining part 14, the nut 21
The diameter is larger than that of the main body portion 13 in order to stop. Further, the lower joint connecting portion 15 may have a cylindrical shape or a rectangular tube shape.

In order to retain the nut 21 from the top by the main body covering portion 22 and the nut retaining portion 14, the nut 21 has a large inner diameter so that the nut can be retained, and an intermediate step portion 23 and a lower portion are formed. It is composed of a joint screw retaining portion 24. The outer diameters of the main body covering portion 22, the intermediate portion 23, and the lower joint screw retaining portion 24 are all the same, and the main body covering portion 22 has substantially the same diameter as the outer diameter of the main body main portion 13. As described above, the intermediate portion 23 has the nut retaining portion 14 so that the nut 21 retains at the lower end of the body covering portion 22.
The diameter is slightly larger than the outer diameter. Further, the lower joint screw retaining portion 24 has substantially the same diameter as the outer diameter of the lower joint 31,
Also, the inside has internal threads.

The lower joint 31 has an upper connecting portion 32,
It is composed of the intermediate mounting portion 33 and the pipe fixing portion 34, and is tubular like the upper joint 11 and the nut 21. The inner diameter of the cylinder is different between the upper connecting portion 32, the intermediate mounting portion 33, and the pipe fixing portion 34.
Has an outer thread 37 so that it can be screwed into the lower joint screw retaining portion 24 of the nut 21, and the inner side thereof is the upper joint 1
The inner diameter is large enough to allow the lower joint connecting portion 15 to be inserted. The pipe fixing portion 34 has an inner diameter such that the container side pipe 3 can be inserted and fixed, and the intermediate mounting portion 33 fixes the upper connecting portion 32 and the pipe fixing portion so that the pipe 3 and the upper joint 11 are not inserted. Part 3
The inner diameter is slightly smaller than 4. Therefore, if the lower joint connecting portion 15 of the upper joint 11 is cylindrical, the inside of the upper connecting portion 32 has a circular hole shape, and if the lower joint connecting portion 15 is of a rectangular tube shape, the upper connecting portion 32. The inside of the has a square hole shape. Further, an O-ring charging groove 35 is formed on the upper surface of the intermediate mounting portion 33 for air-tightly connecting the upper joint 11 and the lower joint 31, and an O-ring 36 is inserted therein. In the illustrated embodiment, the outer diameters of the upper connecting portion 32, the intermediate mounting portion 33, and the pipe fixing portion 34 are different, but the outer diameters may be the same.

FIG. 1 shows a state in which the transfer pipe 2 is connected at the pipe connecting portion 12, the container side pipe 3 is fixed at the pipe fixing portion 34, and the transfer pipe 2 and the container side pipe 3 are connected. is there. From a container (not shown) in which a drug that requires careful handling due to toxicity or irritation is injected, the drug is indicated by an arrow A through a container-side pipe 3 inserted in the container.
Flow in the direction. The medicine flows from the pipe 3 through the lower joint 31 and the upper joint 11 to the transfer pipe 2. At this time, as described above, since the ball valve seats 16 and 17 are provided vertically downward, when the medicine flows in the direction of the arrow A, the fluid stress of the medicine causes the ball valves 18 and 19 to float so that the medicine is smooth. However, when the medicine tries to flow in the direction opposite to the arrow A direction, the ball valves 18 and 19 are pushed down and the medicine does not flow backward. Further, in order to connect the main body 11 to the lower joint 31 by inserting it, and to connect the upper joint 11 and the lower joint 31 in an airtight manner, the O-ring 36
Even if a large amount of the medicine flows, the medicine does not leak to the outside due to the charging.

To transfer the medicine to the disconnected state shown in FIG. 2 after the medicine has been transferred, the nut 21 is rotated in the loosening direction. 31 comes off. Therefore, when this is released, the container side pipe 3 is left in the container as it is, and the operator is safe without coming into contact with the medicine.

[0011]

Due to the structure and operation of the present invention, when the container-side pipe is disconnected, the chemicals that should be handled carefully due to toxicity and irritation do not leak due to backflow, etc., and the nut is rotated. The container-side pipe can be easily and safely separated, and safety is ensured without the worker coming into contact with the medicine.

[Brief description of drawings]

FIG. 1 is a front view of a half cross section showing a configuration of a joint state of a liquid delivery device joint according to the present invention.

FIG. 2 is a front view of a half cross section of the liquid delivery apparatus joint according to the present invention in a detached state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 joint 2 transfer pipe 3 container side pipe 11 upper joint 12 pipe connection part 13 main body part 14 nut retaining part 15 lower joint connecting part 16,17 ball valve seat 18,19 ball valve 21 nut 22 main body covering part 23 middle part 24 Lower joint screw retaining portion 25 Locking step portion 26 Inner screw 31 Lower joint 32 Upper coupling portion 33 Intermediate mounting portion 34 Pipe fixing portion 35 O-ring charging groove 36 O-ring 37 Outer screw A Arrow

Claims (2)

[Claims] 1. A tubular upper upper joint comprising an upper joint for connecting a suction pump, a lower joint for connecting a container-side pipe, and a nut for connecting and disconnecting these upper and lower joints. A ball valve seat and a ball valve are provided at both ends to allow liquid to flow in the transfer direction and prevent backflow.The nut is rotatable so as to cover the upper joint, and the nut of the upper joint is retained. And an O-ring is interposed between the upper joint and the lower joint for airtightly connecting the upper joint and the lower joint. An external screw is provided on the upper connecting portion of the lower joint, the outer screw and the inner screw of the nut are screwed together, and the lower joint and the container side pipe can be removed by rotating in the direction of loosening the nut. Characterized by A joint for a liquid delivery device. 2. The loosening of the nut releases the contact between the upper joint and the O-ring, air flows into the lower joint, the chemical liquid in the container side pipe drops, and the chemical liquid in the upper joint is a ball valve. The joint for liquid-sending device according to claim 1, wherein the joint is prevented from falling.