JPS6317915Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of an interconnection section between fluid piping and fluid piping, and is used, for example, to connect the piping of a car cooler.

Conventional fluid piping connections utilize a screw such as a pipe screw, have a flared structure, have a welded joint structure, or seal by inserting an O-ring into a groove provided between two flanges. In most cases, the outer circumferential portions are connected with bolts, which not only takes time to attach and detach, but also increases the cost of processing the parts.

By the way, room air conditioners, cases, etc.
Improving productivity by simplifying the assembly and installation of multiple piping joints and various hydraulic and pneumatic piping work common to freezers, car coolers, etc. on-site is a major challenge. In addition, the above-mentioned pipe connection device does not have a safety mechanism in case the connection is released with pressure fluid remaining in the pipe, and it is possible to accidentally connect the pipe with pressure fluid remaining. When released, there was a risk that piping parts would fly outward, the piping would meander, causing injury to the human body, and damaging surrounding parts.

Therefore, an object of the present invention is to provide a fluid piping coupling device that is low in cost, can be easily attached and detached in a short time, is highly reliable, and contributes to productivity.

Another object of the present invention is to add a safety feature to the coupling device while achieving the above objectives.

Hereinafter, the present invention will be explained with reference to the drawings showing embodiments.

FIG. 1 shows a connecting portion of a fluid piping according to the present invention. The diameters of the pair of fluid pipings 1 and 2 are formed to be the same size, and the fluid piping 1 has an expanded tube portion 1a formed at the end and a flange formed by folding back at the tip of the expanded tube portion 1a. The inner diameter of the folded end 1c of the portion 4 and the flange portion 4 is formed to be larger than the inner diameter of the expanded tube portion 1a, and the pipe 1,
The base portion 1b of the flange portion 4 is formed to have a curved surface so as not to damage the O-ring 3 when the pipes 1 and 2 are fitted together. In addition, the pipe 2 has an O-ring with a semicircular cross-section in the center, which is expanded with respect to the pipe diameter of the pipe 2 so as to fit into the inner periphery of the expanded pipe part 1a of the pipe 1 with a slight clearance. A straight tube portion 2a at the tip end has a groove 2b formed therein, and an annular bent bulge portion 5 is formed at the root portion of the straight tube portion 2a.

Note that the bent bulge 5 can be easily formed by applying compressive force from both ends of the pipe 2, and the O-ring groove 2b is also formed by supporting one end surface of the pipe 2 with a roller, and forming the O-ring groove 2b in the facing direction. The O-ring groove 2b can be easily formed by pressing a forming roller and rotating the pipe 2, and since the cross-sectional shape of the O-ring groove 2b is semicircular, the thickness can be formed uniformly, which is preferable in terms of strength. . The O-ring 3 disposed in the O-ring groove 2b is made of nitrile rubber or fluorine rubber, and is compressed by an appropriate amount by the inner circumferential surface of the expanded tube portion 1a of the pipe 1 and the outer circumferential surface of the O-ring groove 2b. has been done.

As is clear from FIG. 2, the first locking member 6 is composed of a member 61 having an L-shaped cross section, which is a flat plate bent at a right angle from approximately the center thereof, and forms an L-shape. An opening 62 having a width that allows the pipe 1 to pass through is continuously formed in the center of the two surfaces 61a and 61b. Here, since the width of the opening 62 is set to be slightly larger than the outer diameter of the expanded tube portion 1a of the pipe 1, the first locking member 6 is loosely fitted onto the pipe 1. The second locking member 7 is
Locking parts 71a, 71 facing each other with a gap between them
b, and a bottom part 72 connecting the locking part 71 at one end, and at the tip of each locking part 71,
A locking claw 73 is formed. Here, between the two opposing locking parts 71a and 71b, the pipe 2
Both locking portions 71a,
An arcuate pressure contact part 74 having the same shape as the outer surface of the pipe 2 is formed in the center of the pipe 71b. In addition,
One surface 61a of the first locking member 6 and the bottom 72 of the second locking member 7 are connected to each other by the wire 8, so both the locking members 6 and 7 are rotatably connected to each other. has been done.

When assembling the coupling device configured as described above to piping, first open the opening 6 of the first locking member 6.
2 through the pipe 1 in advance, the locking part 71 of the second locking member 7 is fitted into the rear part of the bent bulging part 5 of the pipe 2 so as to push open both the locking parts 71a and 71b. , by bringing the pressure contact portion 74 into contact with the outer surface of the pipe 2, the second locking member 7 is connected to the pipe 2.
It is locked at the top. Thereafter, the surface 61a of the first locking member 6 connected to the second locking member 7 is rotated to a position facing the second locking member 7, and the tip of the locking part 71 is rotated. By inserting it into the opening 62 and engaging the locking claw 73 with the other surface 61b of the first locking member 6, both members 6, 7
engage. At this time, the flange part 4 of the pipe 1 and the bent bulge part 5 of the pipe 2 are held in the air formed between the locking members 6 and 7, and the pipe 1,
A bond between the two is achieved.

To remove the locking members 6 and 7, press the first locking member 6 slightly toward the second locking member 7.
This can be easily done by disengaging the locking pawl 73 from the first locking member 6 and pulling out the locking portion 71 from the opening 62. Note that if this removal operation is performed with pressure fluid remaining in the pipes, the pipes 1 and 2 will move away from each other when the locking claw 73 comes out of the opening 62. At this time, since the second locking member 7 is fitted onto the pipe 2, a separating force is applied to the first locking member 6, but this first locking member 6 Since it is connected to the locking member 7 via the wire rod 8, when it rotates around the wire rod 8 and finally rotates to a position where the other surface 61b faces the second locking member 7, the piping 1 The flange part 4 of is on this surface 6
1b and can prevent the pipes 1 and 2 from separating. Here, the other surface 61 of the first locking member 6
If the gap between b and the second locking member 7 is set so that the O-ring 3 disposed between the pipes 1 and 2 comes off from the pipe 1, the Even if the second locking member 7 is not removed from the pipe 2, the pressure fluid inside the pipe will be released to the outside of the pipe. Therefore, it is possible to prevent the locking member and the piping from popping out due to a sudden jet of pressure fluid.

As explained above, the present invention allows a first locking member that is loosely fitted onto a pipe and has an L-shaped cross section, and a second locking member that is fitted on the other pipe to be freely rotatable. Since the flange part and the bent bulge part are sandwiched in the space created when the two parts are connected and engaged, it is possible to easily perform attachment and detachment work in a short time, and a highly reliable coupling device is obtained. be able to.

In addition, since the locking members are connected and one is fitted onto the pipe, even if the connection is canceled with pressure fluid remaining in the pipe, the coupling device will not fly away and the pipe will not be damaged. This can easily prevent damage to the human body and other parts due to meandering.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a pipe joint showing an embodiment of the present invention, Fig. 2 is a perspective view showing the coupled state of the coupling device used in Fig. 1, and Fig. 3 is a coupling device used in Fig. 1. FIG. DESCRIPTION OF SYMBOLS 1, 2... Piping, 3... O-ring, 4... Flange part, 5... Bent bulge part, 6... First locking member, 7... Second locking member, 8... Wire rod .

Claims (1)

[Scope of utility model registration request] The ends of the pair of fluid pipings are fitted together via an O-ring, and the end of the outer piping is provided with a flange, while the inner piping is axially opposed to the flange. In the pipe coupling device, the pipe coupling device is provided with a bent bulge portion that is bent at a right angle, and is fitted and attached to the outside of the flange portion and the bent bulge portion that are facing each other to prevent them from separating from each other. a first locking member having two surfaces that are arranged in a straight line and having an opening continuously provided in the two surfaces through which one pipe can pass; and a first locking member that fits onto the other pipe and a second locking member that can extend within the opening of the member and has a locking claw at its tip, the first locking member and the second locking member being rotatably connected; The flange portion and the bent bulge are formed between the two locking members by extending and engaging the locking claws of the second locking member into the opening of the first locking member. A piping coupling device characterized in that the pipes are clamped together.