JPH11108277A - Display member for rotationally moving direction of cap nut of valve connecting joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To operate to rotationally move a cap nut without a mistake by providing a display part containing letters clearly indicating the fastening direction and/or the loosening direction of the cap nut on the piping side according to whether the screw part of a mouthpiece on the side of a valve is left-handed screw or right-handed screw. SOLUTION: This cap nut rotationally moving direction display member 50 is formed capably of being mounted on the mouthpiece 10 on the side of a valve or the vicinity of it, and provided with a display part containing letters clearly indicating the fastening direction and/or the loosening direction of a cap nut 30 on the piping 2 side according to whether the male screw part 11 of the mouthpiece 10 is left-handed screw or right- handed screw in the mounted condition. Namely this display member 50 is made of aluminum alloy for example and formed into a circular disc, and formed so as to be able to be fitted/detached against the mouthpiece 10 on the side of the valve or in the vicinity of it in a single operation. On the display part of the display member 50, an arrow mark indicating the fastening direction and letters of 'fasten' and an arrow mark indicating the loosening direction and letters of 'loosen' are clearly displayed on the visible surface side by an operator at operating to rotationally move the cap nut 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap nut rotating direction indicating member of a container valve connecting joint formed so as to be mounted on or near a base of a container valve.

[0002]

2. Description of the Related Art For example, in the semiconductor industry such as ICs and LSIs, work is performed in a clean room from which fine particles and the like are eliminated, and the environment and conditions for manufacturing work are becoming even more severe. The special gas used in this manufacturing operation is introduced into the room from outside the clean room through a pipe or the like. However, it is extremely disliked that other unnecessary gas molecules such as air are mixed into the special gas.

[0003] For this reason, there has been a demand for ultra-precision joints for connecting pipes and valves (such as container valves) as well as pipes. Further, in the case of a container valve connection joint applied to a high-pressure gas container or the like, complete sealing is required from the viewpoint of security and the like.

For this reason, JIS standards have been established in Japan for such container valve connection joints, and CGA standards (COMPRESSED GA) have been established overseas.
ASSOCATION) has been established.

FIG. 3 shows a conventional structure of a container valve connecting joint manufactured according to the CGA standard. In these figures, 1
Reference numeral 0 denotes a base on the container valve side, reference numeral 20 denotes a nipple, reference numeral 26 denotes a gasket, and reference numeral 30 denotes a cap nut.

The base 10 has a screw portion (male screw portion 11) integrally formed on the outer peripheral surface thereof and a sealing surface 15 formed on the inner surface portion thereof. Nipple 20
Is hermetically attached to the connection pipe 2 and has a sealing surface 25 formed at the tip thereof.

The gasket 26 is made of metal, for example, and is interposed between the sealing surface 15 of the base 10 and the sealing surface 25 of the nipple 20.

The cap nut 30 has a base 10 on its inner peripheral surface.
A female screw portion 31 is formed which can be screwed and engaged with the screw portion (11), and a through-hole portion 32 in which the nipple 20 can be fitted in the axial direction is formed. The inner surface of the cap nut 30 is formed with a pressing surface 33 capable of pressing the rear end surface 27 of the engagement flange 26 of the nipple 20.

Here, the cap nut 30 (female screw portion 31) on the nipple 20 side is screwed with the male screw portion 11 of the base 10 and rotated in a predetermined direction, so that the nipple 20 is pressed by the pressing surface 33. , The two sealing surfaces (15, 25) are pressed and adhered to the gasket 30. Thereby, the base 10 and the nipple 20 are connected by a seal.

[0010]

By the way, for example, in the United States, the base 1 depends on the type of gas contained in the container.
It is determined whether the 0 thread portion (11) is a left-hand thread or a right-hand thread.

On the other hand, in Japan, the screw portion (11) of the base 10 is generally right-handed and left-handed when flammable gas is contained in a container. This is because even if the worker turns the screw part (11) in the direction of opening the cap nut 30 by mistake with the intention of a right-handed screw,
This is because safety is ensured because the left screw closes. However, the classification according to the gas type is not strict, and the fact is that it changes according to the request of the customer.

Here, when the screw portion (11) of the base 10 is a right-handed screw, turning the cap nut 30 rightward toward the container will tighten it, and turning it counterclockwise will remove it. The opposite is true. Normally, the cap nut 30 is rotated while the main valve on the container valve side is closed.
There is no problem even if it turns in the direction to remove when tightening 0, but if you forget to close the container valve side and perform the wrong turning operation as described above, gas will blow out in the worst case There is a risk. In fact, gas poisoning accidents due to blowing of toxic gas have occurred.

Conventionally, when the threaded portion (11) of the base 10 is a left-handed screw, a notch indicating a left-handed screw is formed in the entire circumference of the cap nut 30. Therefore, it should be possible to determine from the outside that the male screw portion of the base is a left-hand thread. It may be misunderstood, etc., and it may be turned clockwise (in the direction to come off) to tighten.

An object of the present invention is to provide a cap nut rotation direction indicating member of a container valve connection joint which can turn a cap nut in a tightening direction and a removing direction without error.

[0015]

SUMMARY OF THE INVENTION The present invention is directed to a cap nut rotating direction indicating member of a container valve connecting joint formed so as to be attachable to or near a base on a container valve side, wherein a screw portion of the base is a left-hand part. A container provided with a display unit including characters indicating a tightening direction and / or a removing direction of a cap nut on a piping side which is screwed and screw-connected to the threaded portion depending on whether the thread is a screw or a right-hand thread. It is a cap nut rotation direction display member of the valve connection joint.

According to this invention, the operator can turn the cap nut without error by following the display section including characters indicating the tightening direction and / or the removing direction of the cap nut without hesitation. .

[0017]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the cap nut rotating direction indicating member (50) of the present container valve connection joint is formed so as to be attachable to or near the base 10 on the container valve side. Thread (male thread 1)
The display device includes a display portion including characters indicating the tightening direction and / or the removing direction of the cap nut 30 on the pipe 2 side depending on whether 1) is a left-handed screw or a right-handed screw.
The container valve connection joint has the same configuration as the conventional example shown in FIG.

Specifically, the cap nut rotating direction indicating member 5
Numeral 0 is made of a metal (for example, aluminum alloy) and is formed in a disk shape, and is formed so as to be detachable with one touch on or near the base 10 on the container valve side. The display portion of the cap nut turning direction display member 50 has an arrow indicating a tightening direction, a letter "Tightening", and an arrow indicating a removing direction on a surface side which is visible to an operator when the cap nut 30 is turned. And "Remove" characters are specified.

The above-mentioned "character" includes a cap nut 30.
Those whose meaning can be easily recognized by an operator who turns the robot are selected. Therefore, the characters are not limited to Japanese, but may be foreign characters (eg, “OPEN”, “CL”).
OSE ") or pictograms.

The cap nut rotation direction display member 5 having the above-described structure is provided.
The operator can rotate the cap nut 30 without error by merely attaching the “0” to the base 10 on the container valve side or in the vicinity thereof and following the display section of the display member 50 without hesitation. Therefore, even if a toxic gas is contained in the container 1, an accident such as a toxic gas blowout does not occur, and the operation can be performed safely.

The cap nut rotation direction indicating member 50 is
Since it is detachable to the base 10 on the container valve side or its vicinity, it can be easily attached to an existing container valve connection joint and used. Also, it can be reused.

In this embodiment, the cap nut rotating direction indicating member 50 is detachably formed on the base 10 on the container valve side or in the vicinity thereof, but may be formed so as not to be detachable.

[0023]

According to the present invention, the direction in which the cap nut is tightened depends on whether the threaded portion of the cap is a left-handed screw or a right-handed screw when the cap is mounted on or near the base and is mounted. Since the display unit including characters indicating the direction of removal and / or the direction of removal is visually provided, the operator can turn the cap nut in the tightening direction and the removal direction without error.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is also a diagram for explaining a display unit.

FIG. 3 is a view for explaining a container valve connection joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Base 11 Male screw part (screw part) 30 Cap nut 50 Cap nut rotation direction display member

Claims (1)

[Claims] 1. A cap nut rotation direction indicating member of a container valve connection joint formed so as to be attachable to or near a base on a container valve side, wherein a screw part of the base is a left-handed screw or a right-handed screw. The cap nut rotation of the container valve connection joint provided with a display part including characters indicating the tightening direction and / or the removing direction of the cap nut on the pipe side which is screwed and sealed and connected to the screw portion in accordance with Direction display member.