JP2003240173A - Pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily change an angle of a second cylindrical body 2 to a first cylindrical body 1 in a pipe joint comprising the first cylindrical body 1 and the second cylindrical body 2 connected thereto in a communicated state. <P>SOLUTION: The connecting end faces of the first and the second cylindrical bodies 1 and 2 are so set as to be inclined by 45° to their respective cylinder shafts, and first and second flange parts 11 and 21 are overhung along their circumferential edges respectively. The first and the second cylindrical bodies 1 and 2 are relatively turnably communicated and connected to each other with their connecting end faces contacting with each other by a connecting member 4, whose both ends are mounted adjacent to the connecting end faces in pullout prevented states respectively, and connected by relative turning preventing means 5 detachably provided in the first and second flange parts 11 and 21 into a relative turning prevented state and airtight state. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a pipe joint formed by connecting two cylindrical bodies.

[0002]

2. Description of the Related Art As a conventional pipe joint of a type in which two cylinders are connected, there is, for example, one shown in FIG. This seed pipe joint is composed of a first tubular body (100) and a second tubular body inserted therein.
The second annular groove (210), which is composed of the tubular body (200) and is provided around the outer peripheral surface of the one second tubular body (200), has the other first tubular body (100).
A metal C-shaped ring (39) having a diameter larger than the inner diameter is fitted and held. The second annular groove (210) is the C-shaped ring.
It is assumed that the outer diameter of (39) is set to be smaller than the inner diameter of the first cylindrical body (100) and can be reduced.
Further, the first tubular body (100) corresponding to the second annular groove (210) in a state where the first tubular body (100) and the second tubular body (200) are connected to each other.
It is assumed that a first annular groove (110) to be fitted when the C-shaped ring (39) elastically returns is formed on the inner peripheral surface of the.

In order to connect these two pipe joints, the diameter of the C-shaped ring (39) is reduced by elastically deforming the second cylindrical body (200) and the first cylindrical body of the other. Push it into (100). The second annular groove (210) is the first annular groove
When reaching the (110), the C-shaped ring (39) elastically returns, and a part of the C-shaped ring (39) is fitted into the first annular groove (110).
The tubular body (100) and the second tubular body (200) are connected in a retaining state.

[0004]

In this conventional pipe joint, the first tubular body (100) and the second tubular body (200) are only linearly connected to each other, and the first tubular body (100) Second cylinder for (200)
The angle of can't be changed. Therefore, the first cylinder (1
When (00) is provided as the gas inflow tube portion of the gas plug, the second tube body (200) functions as an inflow side pipe connecting portion, but its direction is changed according to the extension direction of the inflow side pipe. I can't let you do it.

For example, the connection end of the inflow side pipe is the first
If it is located below the cylinder (100), the first cylinder
It is preferable to have the posture in which the second tubular body (200) hangs with respect to (100), but when it is desired to change the posture of the second tubular body (200) with respect to the first tubular body (100), Is the first cylinder (10
The second cylindrical body (200) linearly connected to (0)
Must be removed and replaced with an L-shaped cylinder (not shown). In this way, when changing the posture of the second cylindrical body (200) with respect to the first cylindrical body (100), it is necessary to prepare a cylindrical body of another shape separately, so it cannot be changed at the installation site. On top of that, replacement is troublesome.

According to the present invention, in a "pipe joint comprising a first tubular body and a second tubular body connected to the first tubular body in a communicating state", an angle of the second tubular body with respect to the first tubular body is set. The challenge is to be able to change easily.

* 1 Item

[0008]

[Means for Solving the Problems] The solution means of the present invention taken to solve the above-mentioned problems is as follows: "The connecting end faces of the first and second cylinders are inclined by 45 degrees with respect to the cylinder axis. The first and second flange portions are configured so as to project respectively along the periphery thereof, and the first and second cylindrical bodies are in a state in which both ends are in the vicinity of the connecting end surface and are prevented from coming off. By a connecting member attached to the first and second flange portions, the connecting end surfaces of the first and second flange portions being detachably attached to the first and second flange portions. It is set so as to be connected in a relative rotation blocking state and in an airtight state. "

One end of the connecting member is mounted near the connecting end surface of the first cylinder, and the other end is mounted near the connecting end surface of the second cylinder. Thereby, the first cylinder and the second cylinder are
It becomes a mode in which the connecting end surfaces of the first and second flange portions are connected to each other via the connecting member so as to be rotatable relative to each other and in a communicating state. Since the connecting member is attached to the first and second cylindrical bodies in a retaining state, the first and second cylindrical bodies do not inadvertently separate from each other, and the first and second cylindrical bodies do not separate.
It is possible to rotate the end faces of the flange portion while maintaining the contact state with each other.

The first and second flange portions are the first and second flanges.
Since the end faces of the first and second flange portions are brought into contact with each other, the first and second pipes are rotated relative to each other with respect to the cylinder axis of the cylinder. The angle between the bodies will change. For example, the angle of the first and second cylinders with respect to the first and second flange portions is 45.
When the first and second flange portions are brought into contact with each other so that the sharpened tip portion of each cylindrical body, which is the degree, is positioned at an imaginary angle with respect to the first and second flange portions, the first and second cylindrical bodies are It becomes a mode in which they are connected in a straight line. From this connection mode, if one of the first and second cylinders is rotated by 180 degrees and the pointed portions are positioned adjacent to each other, the angle between the first and second cylinders is 90 degrees. It becomes degree.

With the first and second cylinders connected to each other at a desired angle, the relative rotation preventing means connects the first and second flange portions to the rotation preventing state. As a result, the first and second cylinders are held in an airtight state and with the mutual angle set to a predetermined angle. Further, if the relative rotation preventing means is removed, the first and second flange portions can be relatively rotated again.

* 2 In the above item 1, "the connecting member is made of an elastic material, and the first and second engaging portions formed in an annular shape are positioned in parallel with each other with a constant interval. Is provided in the first and second flange portions,
On the inner peripheral surface of the cylindrical hole of the second cylindrical body, the first and second engaging portions are slidably fitted in the first and second engaging portions, respectively, and are provided with the first and second groove portions. The holes are formed so as to be positioned parallel to the flange portion. ”As the connecting member, the first and the second annular members are formed at both ends set in parallel.
As long as it is configured to include the second engaging portion, it is possible to employ a tubular structure, a bent metal wire, or the like. In the case of a tubular shape, the first and second engaging portions are
It suffices if the flange portions are provided so as to project outwardly over the entire circumference or partially at the open end edges of the cylinder,
In the case of a metal wire rod, it may be bent so that the ring-shaped portions as the first and second engaging portions are positioned parallel to both ends. In order to attach the connecting member to the first and second cylinders, the both ends are elastically deformed, and the first engagement portion is retained in the first groove formed on the inner peripheral surface of the first cylinder. And the other second engaging portion is elastically deformed in the same manner, and is fitted into the second groove portion of the second tubular body. As a result, the first tubular body and the second tubular body are connected by the connecting member in a retaining state. Further, since the first and second groove portions are set so as to be parallel to the first and second flange portions, respectively, the first and second engaging portions are respectively provided in the first and second groove portions. By sliding at, the first and second cylindrical bodies can be relatively rotated while the first and second flange portions are in contact with each other.

* 3 In each of the above items, "A ring-shaped groove is bored in one of the connecting end faces of the first and second flange portions so as to be concentric with the rotating shaft of the connecting member. At the same time, the other connecting end face is formed with an annular convex portion that slidably fits into the concave groove when the first and second cylindrical bodies are connected. " At the same time as connecting the first and second cylindrical bodies via the member, the convex portion is fitted into the concave groove. As a result, the first and second flange portions do not shift in the radial direction during rotation.

* 4 In each of the above items, "a plurality of screw holes are formed along the circumferential direction in either one of the first and second flange portions in the connected state, and the other one is described. In each of the positions corresponding to the screw holes, an insertion hole through which a bolt to be screwed into the screw hole can be inserted is inserted. ", The first and second flange portions are screwed by the bolt. Therefore, the bolt functions as the relative rotation preventing means. When the bolts are respectively inserted into the plurality of insertion holes formed in either one of the first and second flange portions and screwed into the screw holes at the corresponding positions, the first and second cylinders are formed. The body can be kept connected in a predetermined posture. If the bolts are removed, the first and second flange portions can rotate relative to each other,
The posture of the second tubular portion with respect to the first tubular portion can be changed.

* 5 In the above items, "one of the first and second cylinders is integral with the gas inlet cylinder of the gas plug"
One of the first and second cylinders functions as a gas inflow cylinder of the gas plug, and the other functions as a flexible pipe joint connected to the gas inflow cylinder. When the posture of the second cylinder is set to be linear with respect to the first cylinder, the gas inlet cylinder and the flexible pipe joint can be configured to be coaxially arranged, and from this state, the second cylinder is formed. When the body is rotated 180 degrees, the flexible pipe joint is bent 90 degrees with respect to the gas inflow tube portion.

[0016]

According to the present invention, the relative angle between the first and second cylinders is changed by simply rotating the first and second cylinders relative to each other while the first and second flanges are in contact with each other. Since it can be fixed while maintaining the posture, for example, when it is desired to change the shape of the pipe joint from a linear shape to an L shape, or vice versa, it is necessary and time-consuming to replace parts. Without this, the angle can be easily changed on site. Therefore, it is possible to provide an easy-to-use pipe joint. Further, the connecting members for connecting the first and second cylinders are attached to the first and second cylinders respectively in a retaining state, and even if the relative rotation preventing means is removed, the first and second cylinders are removed. Since the flange portions can be rotated while keeping the contacting end surfaces in contact with each other without separating, the first cylinder body or the second cylinder body must be dropped or lost when rotating. There is no inconvenience. Therefore, the angle between the first and second cylinders can be changed quickly and easily.

In addition to the effect of the above item 1, in the item of item 2, the connecting member is made of an elastic material, and
The first engaging portion formed on the inner peripheral surface of the first and second cylindrical bodies,
Since it is configured to be fitted into the second groove portion and mounted, there is an effect that the coupling member can be easily mounted to the first and second cylindrical bodies.

Further, in the item (3), since the first and second flange portions do not shift in the radial direction even when the relative rotation preventing means is released, the first and second cylinders are rotated. There is no inconvenience that the cylindrical hole of the body is displaced.

In the fourth aspect, since the bolt is used as the relative rotation preventing means, the first and second flange portions are connected in the rotation preventing state by attaching and detaching the bolt, or It can be rotated relative to each other.
Therefore, it is possible to more easily fix the second cylinder to the first cylinder or change the angle.

According to the fifth aspect, it is possible to provide a gas plug in which the posture of the joint can be arbitrarily changed with respect to the gas inflow cylinder portion.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.
It will be described with reference to the drawings. The pipe joint of this embodiment is
As shown in FIG. 1, the first cylinder (1) is integrally provided on the upstream side of the gas plug body (3), and functions as the gas inflow cylinder (10) of the gas plug. It was done like this. The second cylinder (2) connected to the first cylinder (1) is connected to the open end of the gas inflow cylinder (10) and is set so as to function as the inflow side pipe connection joint (20). It is assumed that

As shown in FIG. 2, the gas stopper body (3) is
A stopper accommodating portion (33) in which the stopper (32) is rotatably accommodated is provided, and a first cylinder (as the gas inflow cylinder (10) (so as to communicate with the stopper accommodating part (33) ( 1) and the gas outflow tube portion (30) are connected so as to be coaxially aligned. And the plug
By operating the operation handle (34) connected above the (32) to rotate the stopper (32) in the stopper accommodating portion (33), the second
The gas passage from the tubular body (2) through the first tubular body (1) to the gas outflow tubular portion (30) can be connected or blocked. Further, a joint member (31) for connecting to a gas intake of a gas appliance (not shown) is externally fitted and mounted in the gas outflow tube portion (30) in an airtight state.

The first cylinder (1) as the gas inflow cylinder (10)
And the second cylinder body (2) serving as the inflow side pipe connection joint (20) are connected to each other by a connecting end surface as shown in FIGS. 2 and 3. The first cylinder body (1) and the second cylinder body A configuration in which the body (2) is cut so as to be inclined at 45 degrees with respect to the cylinder axis, and the first and second flange portions (11) and (21) are projected along the periphery of each connecting end face. I am trying.

The first and second flange portions (11) and (21) are formed to have the same diameter, and the first and second cylindrical bodies (1) (to the first and second flange portions (11) and (21) are formed. The tip portions (19) and (29) (see FIG. 1) of the first and second cylindrical bodies (1) and (2), in which the angle formed by the body portion of 2) is 45 degrees, are the first and second flange portions. (11) When the connecting end faces of the first and second flange portions (11) and (21) are overlapped with each other so that they are positioned in an angle relationship relative to each other, the first and second cylinders The outer peripheral surfaces of the body portions of the bodies (1) and (2) are set so as to be linearly continuous without a step. Therefore, the first and second flange portions (11) and (21) are the first and second cylindrical bodies.
(1) (2) It is configured so as to project in a manner shifted from the center of each of the connecting end faces toward the tip portions (19) and (29), respectively.

The second flange portion (21) is formed with four screw holes (22) circumferentially along the outer peripheral edge thereof at intervals of 90 degrees so as to penetrate or open to the connecting end face. When the first and second flange portions (11) and (21) are overlapped with each other, screw holes (22) are provided at predetermined positions of the first flange portion (11) corresponding to the second flange portion (21). An insertion hole (12) for inserting a bolt to be screwed is passed through.

Further, on the inner peripheral surfaces of the first and second cylindrical bodies (1) and (2) located near the central openings of the first and second flange portions (11) and (21), a connecting member described later is formed. First and second annular grooves (13) and (23) for engaging both ends of (4) in a retaining state and pivotally
Are formed concentrically with the central opening. Then, the cylindrical holes (16) (26) of the first and second cylindrical bodies (1) and (2) are respectively formed so as to be continuous with the first and second annular grooves (13) and (23). Second cylinder
(1) It shall be formed along the cylinder axis of (2), respectively.

In addition, an annular convex portion (14) is provided on the connecting end surface of the first flange portion (11) so as to be concentric with the central opening, and the second flange portion (21) is connected. An annular groove (24) into which the annular convex portion (14) is slidably fitted is formed at a position of the end surface corresponding to the annular convex portion (14).

An annular step portion (25), which is one step lower than the connecting end face, is formed on the inner peripheral side of the annular groove (24) so as to open to the central opening. 1st and 2nd flange (1
1) When the connecting end faces of (21) are overlapped with each other, the first
The O-ring (15) is housed in the space formed between the connecting end surface of the flange portion (11) and the annular step portion (25) in a close contact state.

Next, the first flange portion (11) of the first tubular body (1)
The structure of the connecting member (4) for connecting the second flange portion (21) of the second cylindrical body (2) and the second flange portion (21) so as to be rotatable relative to each other will be described. The connecting member (4) is made of an elastic material such as resin or rubber into a cylindrical shape, and notches (40) are cut at 90 degree intervals in the circumferential direction from both open ends of the connecting member (4). . The engaging flanges (41) and (42) are respectively projected from the open ends of the connecting member (4) where the notch (40) is not formed so as to project outward.

The outer diameter of the body portion of the connecting member (4) is set to be slightly smaller than the diameter of the central opening of the first and second flange portions (11) and (21), and the engagement is performed. Flange (41) (42)
Has an outer diameter larger than the diameter of the central opening of the first and second flange portions (11) and (21) and is formed on the inner peripheral surfaces of the first and second cylindrical bodies (1) and (2), respectively. The first and second annular grooves (13) (2)
It is set to a size that roughly matches the diameter of 3).

The open end of the connecting member (4) is elastically deformed to fit the engaging flange (41) at one end into the first annular groove (13) of the first tubular body (1) and at the other end. The engagement flange (42) is fitted into the second annular groove (23) of the second tubular body (2). The engaging flanges (41) (4) when fitted into the first and second annular grooves (13) (23)
By elastically returning 2), the connecting member (4) is attached to the first and second cylindrical bodies (1) and (2) in a retaining state. In other words, the first and second cylindrical bodies (1) and (2) are connecting members.
This is a mode in which they are connected via (4). In addition, this connecting member
In the connection state by (4), the first and second flange portions (1
1) The dimensions of each part shall be set so that the end faces of (21) contact each other. Also, the first and second flange portions (11)
With the (21) in contact with each other, the first cylinder (1) and the second cylinder
It can rotate relative to (2).

As shown in FIGS. 1 to 3, the first cylindrical body (1)
And the second cylinder (2) are to be arranged in a straight line,
The tip portion (19) of the first tubular body (1) and the tip portion (2) of the second tubular body (2)
The first and second flange portions (11) and (21) are rotated relative to each other so that the position (9) and the first and second flange portions (11) and (21) are located at an angle with each other. Then, when the predetermined posture is reached,
The bolt (5) is inserted through the insertion hole (12) of the first flange portion (11) and the second flange portion (2
Screw it into the screw hole (22) of 1). In the case shown in the figure,
Since the insertion holes (12) are opened only on both sides and the upper side of the gas stopper body (3), there are three screwed portions.

By fastening the first and second flange portions (11) and (21) with the bolts (5) as described above, the first and second flange portions (11) and (21) are prevented from rotating relative to each other. Since the O-ring (15) is fixed in this state and the O-ring (15) is brought into close contact between the connecting end face of the first flange portion (11) and the annular step portion (25), the inflow side pipe connection joint (20) The second cylinder (2) as
The first cylinder (1) as the gas inlet cylinder (10) of the gas stopper body (3)
And can be connected in an airtight manner.

When the inflow side pipe is connected to the other end of the second tubular body (2), the tubular hole (26) of the second tubular body (2), the connecting member (4), and the first tubular body Pass through the cylindrical hole (16) of (1) and then the gas stopper body (3)
A gas passage to is formed. The cylindrical hole (16) and the cylindrical hole (26) are continuous with the peripheral edges of the first and second annular grooves (13) and (23) for mounting the connecting member (4) in a retaining state. Since it was set to form each, the cylindrical hole of the second cylindrical body (2)
The gas sent to the (26) is smoothly sent to the cylindrical hole (16) of the first cylindrical body (1) via the connecting member (4).

When the bolt (5) is removed, the second tubular body (2) is rotatable with respect to the first tubular body (1). The posture of the two cylinders (2) can be changed to a predetermined angle. After the change, the bolts (5) may be used to screw the first and second flange portions (11) and (21) again.

FIG. 4 shows a state in which the second tubular body (2) is rotated 180 degrees with respect to the first tubular body (1) from the state of FIG. In this case, the tip portions (19) (29) of the first and second tubular bodies (1) and (2) are the first and second flange portions (11) and (21).
The first cylinder (1) and the second cylinder (1)
The angle formed by the cylindrical body (2) is 90 degrees.

At this time, even if the bolt (5) is removed, the first tubular body (1) and the second tubular body (2) are connected by the connecting member (4). There is no inconvenience of dropping or losing the cylinder (2). Also, when turning,
Since the annular convex portion (14) provided on the first flange portion (11) slides while being fitted in the annular concave groove (24) provided on the second flange portion (21), , 2nd flange (11) (2
In 1), the posture of the second cylindrical body 2 can be changed without being displaced in the radial direction.

After changing the posture of the second tubular body (2), if it is screwed again with the bolt (5), the gas inlet tubular portion (10) of the gas stopper body (3)
On the other hand, the inflow side pipe connection joint (20) can be connected in a state of being bent at 90 degrees.

As described above, in this embodiment,
At the site where the gas plug is installed, the attitude of the inlet side pipe connection joint (20) with respect to the gas inlet cylinder (10) can be adjusted according to the direction of the inlet pipe, so a gas stopper that is easy to use is provided. You can

In the above embodiment, the connecting member (4) is made of a resin or rubber tubular body, but an elastic metal wire is bent to form an annular ring as shown in FIG. It is also possible to employ a configuration in which the shaped portions (43) and (44) are arranged in parallel at a predetermined interval. In this case, the ring-shaped portions (43) and (44) have the engagement flanges (4
1) It will function as (42).

[Brief description of drawings]

FIG. 1 is a side view of the entire gas plug showing a state in which one of the pipe joints according to the embodiment of the present invention is integrally provided with the gas plug.

FIG. 2 is a vertical cross-sectional view of FIG.

FIG. 3 is an enlarged cross-sectional view of a main part of FIG.

FIG. 4 is an explanatory view showing a state in which one cylinder is rotated 90 degrees from the state of FIG.

FIG. 5 is an explanatory view showing another example of the connecting member.

FIG. 6 is a sectional view showing an example of a conventional pipe joint.

[Explanation of symbols]

(1) ・ ・ ・ ・ ・ First cylinder (11) ・ ・ ・ ・ ・ First flange (2) ・ ・ ・ ・ ・ Second cylinder (12) ・ ・ ・ ・ ・ Second flange (4) ・ ・ ・ ・ ・ Connecting member (5) ・ ・ ・ ・ ・ Relative rotation prevention means

Claims (5)

[Claims] 1. A pipe joint comprising a first tubular body and a second tubular body connected to the first tubular body in a communicating state, wherein the connecting end faces of the first and second tubular bodies are respectively attached to a tubular shaft. The first and second flanges are set so as to be inclined by 45 degrees with respect to each other, and the first and second flange portions respectively project along the periphery thereof. A connecting member is attached to both ends of the connecting member so that the connecting end faces are in contact with each other so as to be rotatable relative to each other, and the first and second flange portions are detachably provided. A pipe joint that is set to be connected in a relative rotation preventing state and in an airtight state by a relative rotation preventing means. 2. The pipe joint according to claim 1, wherein the connecting member is made of an elastic material, and the first and second engaging portions formed in an annular shape are parallel to each other with a constant space. The first and second flanges are provided in the vicinity of the first and second flange portions.
The first and second engaging portions are slidably fitted to the inner peripheral surface of the cylindrical hole of the cylindrical body in a state of preventing slippage, respectively.
A pipe joint in which the second groove portion is formed so as to be positioned in parallel with the first and second flange portions. 3. The pipe joint according to claim 1 or 2, wherein an annular groove is formed on one of the connecting end faces of the first and second flange portions so as to be concentric with the rotating shaft of the connecting member. And a convex portion that is slidably fitted into the concave groove when the first and second cylindrical bodies are coupled is formed in an annular shape on the other coupling end surface. Pipe fittings. 4. The pipe joint according to claim 1, wherein one or both of the first and second flange portions in a connected state have a plurality of screw holes along a circumferential direction thereof. A pipe joint that is formed and has an insertion hole through which a bolt to be screwed into the screw hole can be inserted at each position corresponding to the screw hole on the other side. 5. The pipe joint according to claim 1, wherein one of the first and second cylinders is integral with a gas inflow cylinder portion of a gas plug.