JPH08170765A - Tube connector - Google Patents

Abstract

PURPOSE: To improve the workability of connecting a tube connector by housing a cylindrical body of a female connector over a cylindrical part of a male connector, and press-fitting an O-ring between a tube on the male connector side and the inner circumferential surface of the cylindrical body of the female connector to tightly house the cylindrical body over the male connector. CONSTITUTION: When a cylindrical body 21 of a female connector 2 is housed over a cylindrical part of a male connector 1, a flange part 22 is arranged opposite to a locking disk 14. When a locking C ring 3 is fitted so that the locking disk 14 and the flange part 22 may be fitted in a slit S of the locking C ring 3, the locking disk 14 and the flange part 22 are engaged with each other in a fall-proof manner through the locking C ring 3 to connect the male connector 1 to the female connector 2. An O-ring 13 is press-fitted between a pipe P1 of the male connector 1 and the inner circumferential surface of the cylindrical body 21 to form the seal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connector for connecting pipes such as gas pipes and water pipes in an airtight (or watertight) outer peripheral state.

[0002]

2. Description of the Related Art As a pipe connector of the above type, one having a structure as shown in FIGS. 1 and 2 has already been used, and a connecting male member (1) mounted on the end of the pipe and the other end. Of the connecting male tool (1)
The flange portion of the connecting female tool (2) and the connecting female tool (2) are connected in a retaining state by the locking C-ring (3), which can be easily connected without using a tool and has good operability.

For this reason, in the prior art, the above-mentioned connecting male tool is used.
In (1), the ends themselves of the metal pipe (P ₁ ) are processed to form a pair of annular ribs (11) and (11) so as to have a constant distance from each other. ) (11), the O-ring (13) and the backup ring (12) for locking the O-ring (13) are externally fitted, and the locking disk (14) is loosely inserted in the inner annular rib (11). It is a fitted structure. And the other connecting female tool (2)
At the end of the metal pipe (P ₂ ), a tubular body (21) of a size to be fitted on the annular ribs (11) (11) is continuously provided, and a flange portion is provided at its open end.
(22) is overhanging.

The locking C-ring (3) is formed by bending an elastic strip-shaped metal plate into an arcuate main body (31) by bending it into an arcuate shape having a size of a semi-circle or more as a whole. Bend outwards as a bending guide (32), and
The arc-shaped main body (31) is provided with a slit (S) (or a rectangular long hole) having a constant width. In this structure, as shown in FIG. 2, when the tubular body (21) is fitted onto the annular ribs (11) and (11), the diameter of the O-ring (13) is tightly pressed into the tubular body (21). Therefore, the connection male tool (1) and the connection female tool (2) can be airtightly connected in this external fitting state.

In this connected state, the locking disk (14)
When the locking C ring (3) is externally fitted so that the flange portion (22) and the flange portion (22) face each other and are fitted into the slit (S) of the locking C ring (3), the locking is performed. The disc (14) and the flange portion (22) are engaged with each other in a retaining state via the locking C ring (3), and the connected state is maintained.

However, in this conventional device, the connecting male tool is used.
When the (1) and the female connector (2) were connected, there was a problem that it was difficult to attach the locking C-ring (3), and the pipe connection work in a narrow place was troublesome. This is the connection male
Since the locking disc equipped in (1) (14) it is only loosely fitted to the pipe (P _1), located in the mobile freely relationship in the axial direction of the pipe (P _1), connecting the male fitting ( When the 1) and the female connector (2) are fitted together, the distance between the locking disk (14) and the flange (22) is not constant, and the distance changes depending on the posture of the pipe (P ₁ ). Or
On the other hand, when the connecting male tool (1) and the connecting female tool (2) are in the final connected state, the axial outer surface distance between the locking disc (14) and the flange portion (22) and the slit (S) The fitting margin with the width is set to be small. Therefore, it becomes difficult to insert the locking disc (14) and the flange portion (22) into the slit (S) of the locking C ring (3).

The present invention has been made in view of the above point, and "A connecting male tool provided at the end of _one pipe (P ₁ )"
(1) and a connecting female tool (2) equipped with a tubular body (21) that is equipped at the end of the other pipe (P ₂ ) connected to it and that is fitted onto the connecting male tool (1). , The engaging disk (14) provided on the connecting male tool (1) with the connecting female tool (2) externally fitted and connected to the connecting male tool (1) and the flange portion provided on the cylindrical body (21) (22) A pipe connector consisting of a locking C-ring (3) which is fitted onto each other so as to engage with each other from the outside in the axial direction, in the connection male tool (1) and the female connector (2). The task is to improve workability of connection with.

[0008]

[Technical Means] The technical means of the present invention for solving the above-mentioned problem is that "a connecting male tool (1) has an annular rib (11) provided at the tip of _one pipe (P ₁ ), O-ring that fits outside the pipe (P ₁ )
(13) is sandwiched between the annular rib (11) and the opposite side fixed to the locking disk (14), and the inner peripheral portion of the locking disk (14) to the one pipe (P ₁ ) The cylindrical portion (15) that is tightly fitted to the outside is attached to the O-ring (1
3), and the outer diameter of the tubular portion (15) is set to a size that fits into the tubular body (21) of the female connector (2) ”.

[0009]

The above technical means operates as follows. When the tube body (21) of the connecting female tool (2) is fitted onto the tube portion (15) of the connecting male tool (1), one pipe (P ₁ ) and the tube body (21) of the connecting male tool (1) side are fitted. An O-ring (13) is press-fitted between the inner peripheral surface of () and the cylindrical body (21) is tightly fitted (airtight state or watertight state) to the connecting male tool (1). The tubular portion (15) connected to the locking disk (14) is a tubular body.
Inserted on the open end side of (21). In this state, the locking disc (14) is fixed to _one pipe (P ₁ ),
The position and angle of the locking disk (14) with respect to the pipe (P ₁ ) do not change. Therefore, the distance between the flange portion (22) provided on the tubular body (21) and the locking disk (14) does not change.

In this state, the locking disk (14) and the flange portion (22)
C-ring for locking so that the outer surfaces of the
When the (3) is attached, the connecting male tool (1) and the connecting female tool (2) are connected in a state of being retained.

[0011]

[Effect] When the connecting C-ring (3) is attached and the connecting male tool (1) and the connecting female tool (2) are connected in a retaining state, the locking disk (14) of the connecting male tool (1) is ) And the flange part (22) of the female tool (2)
The connection male tool (1)
The workability of the connection work with (2) is improved, and the connection work can be easily performed even in a narrow space.

[0012]

Embodiments of the present invention described above will now be described in detail with reference to the drawings. An embodiment will be described with reference to FIGS.
The connection male fitting (1) is a pipe made of copper pipe or aluminum pipe.
It is formed at the tip of (P ₁ ).

This connecting male tool (1) has an annular rib (11) provided inside the pipe (P ₁ ) leaving a guide part (P ₀ ) consisting of an unmachined end having a constant width at the tip. ), And a locking disk (14) secured to the inside of the annular rib (11) at a constant interval.
And an O-ring (13) fitted between them. The locking disk (14) is provided with a cylindrical portion (15) that projects toward the annular rib (11) side. In this embodiment, the cylindrical portion is formed.
A concave groove (16) is formed in an annular shape on the inner peripheral surface of (15). In order to fix the locking disc (14), a portion of the pipe (P ₁ ) corresponding to the cylindrical portion (15) is subjected to stringing, and the pipe wall is plastically deformed so as to bulge outward. As a result, the tube section (15) becomes a pipe (P ₁ ).
On the other hand, the movement in the axial direction is blocked, and the rotation with respect to the pipe (P ₁ ) is also blocked by the frictional force between the stringing part (17) and the concave groove (16).

In this embodiment, the distance between the opposed surfaces of the tubular portion (15) and the annular rib (11) is set slightly larger than the diameter of the cross section of the O-ring (13). Other connection female (2)
The configuration of is the same as the conventional one, and the other of the above tubes (P ₁ )
A tube (21) that is connected to the end of a pipe (P ₂ ) made of the same material as above and is fixed in an airtight connection by brazing, and a flange (22) that extends from this open end. It is equipped with.

The diameter of the flange portion (22) and the diameter of the locking disk (14) are set to be the same, and the locking disk (14)
The fitting tolerance between the outer diameter of the cylindrical portion (15) and the inner circumference of the cylindrical body (21), which are continuously connected to each other, is set to a so-called clearance fit.
The tubular body (21) has a small-diameter tubular portion (2) for brazing with the pipe (P ₂ ).
3) are connected in series, and the end of the pipe (P ₂ ) is brazed into the small diameter cylindrical portion (23) with a part of the protruding portion (23a) fitted therein. And, there is a boundary end face (24) between the inner circumference of the tubular body (21) and the inner circumference of the small diameter tubular portion (23), and from this boundary end face (24) to the open end of the tubular body (21). The depth is matched with the distance between the end surface of the annular rib (11) on the tip side of the tube (P ₁ ) and the side surface of the locking disk (14) in the same direction.

Therefore, the tubular body (21) is connected to the tubular portion (1) of the connecting male tool (1).
5) When fitted on the outer side of the flange (22) and the locking disc (1
4) will be in contact with. As shown in FIGS. 4 and 5, the locking C-ring (3) is the same as the conventional one, and is a strip-shaped arc-shaped main body (31) bent in an arc shape larger than a half arc.
And a bending guide (32) that bends outward at its tip side. And, in the center of the arcuate main body (31), a bent top portion (33) which is bent outward in a mountain shape is formed, and the arcuate main body portion (31) excluding the bent top portion (33) and the bending guide ( A pair of elongated slits (S) (S) are formed in a part of the area 32).

The width of the slit (S) is such that the engaging disc (14) and the flange portion (22) in the abutting state when the connecting male tool (1) and the connecting female tool (2) are connected to each other. It is set to be slightly larger than the thickness in the axial direction of and. Therefore, the connecting male (1)
And the connecting female tool (2) are connected to each other in the above-mentioned connected state, the engaging disk (14) and the flange portion (22) are slits (S) (S).
When the locking C ring (3) is attached so that it fits inside,
The locking disk (14) and the flange portion (22) are engaged with each other in a retaining state via the locking C ring (3), and the connecting male tool (1)
And the connecting female tool (2) are connected.

In the above embodiment, the tubular portion (15) and the pipe (P ₁ )
Although the pipe and the pipe (P ₁ ) are fixed by pulling out the string, they may be fixed by brazing or the like. In the former case of fixing by stringing, flux does not adhere to the vicinity of the fixed part of the tubular portion (15) unlike in the case of brazing, and therefore post-processing after fixing is unnecessary. Further, in the above embodiment, a small diameter hole portion (23) that fits into the guide portion (P ₀ ) on the tip side of the annular rib (11) is formed on the inner circumference of the tubular body (21), and Since the depth from the boundary end face (24) to the open end of the tubular body (21) was made to match the distance from the end face on the tip side of the annular rib (11) to the locking disc (14),
With the connecting male tool (1) and the connecting female tool (2) connected, the locking disc (14) and the flange (22) will come into contact with each other, and the locking C ring (3) can be easily attached. . The depth from the boundary end surface (24) to the open end of the tubular body (21) is the same as long as it is equal to or more than the distance from the end surface on the tip side of the annular rib (11) to the locking disk (14). .

The depth from the boundary end face (24) to the open end of the tubular body (21) is determined by the depth of the locking disc from the end face of the annular rib (11) on the tip side.
When it is shorter than the distance to (14), the slit (S) of the locking C ring (S) is considered in consideration of the gap between the locking disc (14) and the flange portion (22) in the connected state. The width will be determined. Further, although the metal pipe is shown as the pipe in the above embodiment, it goes without saying that the present invention can be applied to a pipe made of synthetic resin.

[Brief description of drawings]

1 is an exploded view of a conventional example

FIG. 2 is an explanatory diagram of the connection state.

FIG. 3 is an explanatory view of a connecting male tool (1) according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a connected state

FIG. 5 is a sectional view of the locking C ring (3).

[Explanation of symbols]

(P ₁ ) (P ₂ ) ・ ・ ・ Pipe (1) ・ ・ ・ Connecting male fitting (21) ・ ・ ・ Cylinder (2) ・ ・ ・ Connecting female fitting (14) ・ ・ ・ Locking disc (22)・ ・ ・ Flange (3) ・ ・ ・ Locking C ring (11) ・ ・ ・ Annular rib (15) ・ ・ ・ Cylindrical part (13) ・ ・ ・ O ring

Claims (3)

[Claims] 1. A connecting male tool (1) equipped at _one end of a pipe (P ₁ ), and another connecting male tool installed at the end of another pipe (P ₂ ) connected thereto. The connecting female tool (2) having the tubular body (21) fitted onto the (1) and the connecting male tool (1) with the connecting female tool (2) externally fitted and connected to the connecting male tool (1). C-ring (3) for locking which is fitted so as to engage with the locking disk (14) provided and the flange (22) provided on the cylindrical body (21) from the outside in the axial direction. In the pipe connecting device consisting of and, the connecting male device (1)
, Said annular rib across the one pipe annular rib provided at the tip portion of (P ₁₎ (11), O-ring fitted around the tube (P ₁₎ to (13)
A cylinder (15) which is composed of a locking disc (14) fixed to the opposite side of (11), and which is tightly fitted to the pipe (P ₁ ) on the inner periphery of the locking disc (14).
A pipe connector in which the outer diameter of the tubular portion (15) is set so as to be fitted into the tubular body (21) of the female connector (2). 2. The annular rib (11) is formed at a position where a guide portion (P ₀ ) having a constant width is left from the end of the pipe (P ₁ ),
A small-diameter hole portion (23) that fits into the guide portion (P ₀ ) on the tip side of the annular rib (11) is formed on the inner periphery of the tubular body (21). The depth from the boundary end face (24) to the open end of the tubular body (21) is set to be equal to or more than the distance from the end face on the tip side of the annular rib (11) to the locking disc (14). Pipe fittings. 3. A pipe (P ₁ ) is used as a pipe, and a groove is formed on the inner circumference of the tubular portion (15).
The pipe connector according to claim 1 or 2, wherein the (16) is formed in an annular shape, and the stringing portion of the pipe wall of the pipe is pressed into the concave groove (16).