JPS6339513Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a pipe joint device used for connecting pipes, etc. in gas appliances.

<Prior art> This type of conventional coupling device uses a fitting having a hole for inserting a piping member at its tip and a fixing plate that is inserted into the piping member so that it does not come off. Some fixtures are removable; for example, the fixing plate is made of a channel material with a lip, and a protrusion is provided on the outer periphery of the tip of the fixture in the radial direction, so that the lip of the fixing plate can be attached to the fixture. A device is known in which the fixing plate is engaged with the protrusion and a screw is screwed into a screw hole formed in one of the protrusions to prevent rotation of the fixed plate (see Japanese Utility Model Application Publication No. 58-63482). .

<Problems that the invention aims to solve> The above conventional example solves the problems that existed in the previous ones, that is, it is easy to cause leakage, and it takes time and effort to process and connect each part. Although it was made with the purpose of
The fixing plate is a channel material with a lip that has many bends, making it cumbersome to manufacture.Also, when rotating the fixing plate in combination with a fixture, there is no rotation stopper, so it is difficult to rotate the fixing plate by the appropriate angle. It is troublesome to align the screw holes, and there are new problems such as having to tighten the screws in a narrow space such as in a gas appliance in order to prevent the fixing plate from rotating.

The present invention has been made with the object of solving these problems and providing a pipe joint device that is easy to process and can be easily connected without using screws.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a pair of locking protrusions protruding in the radial direction on the outer periphery of a fitting having a piping member insertion hole at the center of the tip. A U-shaped fixing plate is provided that is rotatably fitted into the piping member and is prevented from coming out by a flange formed near the end of the piping member, and the fittings are connected to both bent pieces of the fixing plate. A pair of locking claws that lock on the stopper are formed facing the same direction of rotation, a spring ring is interposed between the flange of the piping member and the fixed plate, and the end of the piping member is inserted together with the O-ring. Insert the piping member into the hole, lock each locking claw of the fixing plate with each locking protrusion of the fixture, and press the flange of the piping member toward the back of the insertion hole with the spring ring. It is characterized by being connected to the fixture.

<Function> In this invention, the piping member is connected to the fixture simply by applying the fixing plate to the fixture and rotating it, and the biasing force of the spring ring maintains airtightness and prevents the fixing plate from falling off. be done.

<Example> The present invention will be specifically explained below with reference to an example shown in the drawings.

FIG. 1 is a sectional view of the connected state, and FIG. 2 is a perspective view before connection. In the figures, 1 is a piping member such as a copper pipe, 2 is a fixture, and 3 is a fixing plate.

The fitting 2 is made of die-cast aluminum, for example, and has an insertion hole 4 in the center of the tip into which the piping member 1 is inserted.
is provided, and a flange 5 is provided on the end face,
A pair of locking protrusions 6 are provided on the outer periphery of the flange 5 to protrude in the radial direction. The fixing plate 3 is obtained by press-forming a steel plate or the like into a U-shape, for example, and has an insertion hole 8 in the center of the central member 7 through which the piping member 1 is inserted, so that the piping member 1 can be freely rotated. It is inserted. A pair of locking pawls 11, 11 are provided in the bent pieces 9 at both ends of the fixed plate 3 by forming recesses 10 from each side edge at diagonal positions of the central member 7, respectively, facing in the same rotation direction. has been formed. This locking pawl 11 has an inclined guide portion 11a and a stepped portion 11.
b, and has a shape that is easy to lock and difficult to dislodge.

12 is a flange formed by press working near the end of the piping member 1; 13 is an O-ring fitted into the tip of the piping member 1; 14 is a spring ring;
The fixing plate 3 is prevented from coming out by a collar part 12,
The spring ring 14 is fitted between the collar 12 and the fixed plate 3. Note that the illustrated spring ring 14 is a wire-shaped spring material wound once, but
This may have another shape, and although the insertion hole 8 of the fixing plate 3 is shown as a pot-shaped hole, it may also be a normal round hole or other shape.

Next, to explain the connection work, first insert the tip of the piping member 1 together with the O-ring 13 into the insertion hole 4 of the fixture 2, then insert the fixing plate 3 slightly against the locking protrusion 6 as shown in FIG. Press it against the surface of the flange 5 of the fixture 2 in an inclined position. In this state, the O-ring 13 is placed between the bottom of the insertion hole 4 and the flange 1 so that the locking pawl 11 comes to a position where it can engage with the locking protrusion 6.
The dimensions of each part are selected so that the locking protrusion 6 is compressed appropriately between the locking claws 11 and the locking protrusion 6 while pushing the fixing plate 3 against the repulsive force of the spring ring 14. Rotate the fixed plate 3 clockwise until it passes 11a. This rotation is performed smoothly because the guide portion 11a is inclined, and the locking protrusion 6 immediately locks onto the step portion 11b.

This completes the connection work, and the fixing plate 3 is stopped from rotating by the engagement between the locking protrusion 6 and the locking pawl 11, and the repulsive force of the spring ring 14 causes the O-ring 13 to connect with the flange 12. The fixing plate 3 is pressed in the insertion hole 4 to maintain airtightness, and the fixing plate 3 is biased in the direction to pull out the piping member 1, so that the locking protrusion 6 and the locking claw 11
The locked state between the piping member 1 and the fitting 2 is maintained.
will be reliably connected. Note that the connection can be easily disconnected without using any tools by performing the operation opposite to the above connection.

<Effects of the invention> As is clear from the description of the embodiments above, the present invention has a U-shaped fixing plate, which makes it easy to manufacture by press working, etc. The piping member and the fitting are connected by engaging the locking protrusion and the locking claw by rotating the fixing plate, making the connection work easy and quick even in narrow spaces such as inside the gas appliance body. This makes it possible to reduce costs in terms of both parts costs and man-hours. In addition, in the connected state, airtightness is better maintained due to the pressure applied by the spring ring, and the locking pawl is less likely to come off the locking protrusion, making it possible to make a highly reliable connection. Furthermore, since it is easy to disconnect without tools, there is also the advantage that the workability of inspecting and repairing gas appliances is improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention in a connected state, and FIG. 2 is a perspective view before connection. DESCRIPTION OF SYMBOLS 1...Piping member, 2...Mounting tool, 3...Fixing plate, 4...Insertion hole, 6...Latching protrusion, 9...Bend piece, 11...Latching claw, 12...Brim Part, 13...O
Ring, 14...Spring ring.

Claims (1)

[Scope of Claim for Utility Model Registration] A pair of locking protrusions are provided on the outer periphery of a fitting having a hole for inserting a piping member at the center of the tip, and the fitting is rotatably inserted into the piping member, and A U-shaped fixing plate is provided that is prevented from coming out by a flange formed near the end of the fixing plate, and a pair of locking claws that lock on the locking protrusions of the mounting tool are provided on both bent pieces of the fixing plate. They are formed facing the same direction of rotation, a spring ring is interposed between the flange of the piping member and the fixing plate, the end of the piping member is inserted into the insertion hole together with the O-ring, and each locking pawl on the fixing plate is inserted. A pipe joint device in which a piping member is connected to a fitting in a state where the piping member is respectively locked to each locking protrusion of the fitting and the collar of the piping member is biased toward the back of an insertion hole by a spring ring.