JPS6120391Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas connection device for connecting a steel pipe to a hose end.

Many gas appliances used indoors are originally piped with rubber pipes. However, fixed installation type gas appliances that are installed in a fixed position indoors are rarely changed.
In the case of rubber pipe piping, long-term use may cause aging of the rubber pipe and there is a risk of gas leakage. Therefore, from the viewpoint of safety, it is preferable that piping to such fixedly installed gas appliances be made of highly durable steel pipes.

However, in order to use existing gas piping to connect steel pipes to gas appliances, the main pipe must be removed.
It is necessary to screw the instrument side piping to this unfinished piping end via a joint, or to remove the hose end and screw it to this part in the same manner as above.

In the former case, it is necessary to close the main valve of the gas piping prior to piping, and in the latter case, it is necessary to remove the firmly attached hose end, which both impede work efficiency. becomes.

This is because, prior to installing the steel pipe piping, the existing piping and hose ends must be removed.

The present invention aims to improve piping efficiency by making it possible to install steel pipe piping without removing the existing base or hose end.

The technical means of the present invention to solve the above problems is to enable a cylindrical base screw and a tightening screw to be screwed together, and a tightening ring with a C-shaped cross section is attached to the inner surface of the screwed part of both. a cylindrical fitting, which is inserted into the tightening means and includes a base part that fits over the hose end, and an annular tongue piece continuing to the tip thereof;
It consists of a connection screw having a piping connection part on one side, a concave part around the other end face, and a concave groove on the outer circumferential surface thereof, and an enlarged part provided at a position corresponding to the annular tongue piece on the inner circumference of the tightening screw. When the split ring is attached to the diameter portion and the concave groove provided portion of the connecting screw is fitted into the enlarged diameter portion, these parts are arranged so that the split ring fits into the concave groove and the annular tongue piece fits into the concave portion in an airtight manner. The shape and position of the recessed portion and the recessed groove are set.

The above technical means works as follows. When the base of the cylindrical packing is externally fitted onto the hose end, and then the base screw, tightening ring, and tightening screw are sequentially fitted onto the hose end, the tightening means is externally fitted to the base of the cylindrical packing. . When the base screw and the tightening screw are screwed together and tightened, the tightening ring having a C-shaped cross section of the tightening means reduces its diameter and presses the cylindrical packing onto the hose end. This ensures airtightness between the hose end and the cylindrical packing.

On the other hand, when the tip of the connecting screw (concave groove disposed portion) is forcibly inserted into the enlarged diameter portion of the tightening screw, the connecting screw is rotatably connected to the tightening screw via the split ring, and the connecting screw is connected to the tightening screw through the split ring. The annular tongue of the cylindrical packing is hermetically fitted into the annular recess provided around the distal end surface.

After that, when the steel pipe piping end on the instrument side is screwed into the piping connection part of the connection screw, the steel pipe piping to the downstream side is completed.

Based on the above-mentioned effects of the technical means, the present invention has the following specific effects.

(1) Steel pipe piping can be done directly from the hose end.
There is no need to remove the existing base or hose end when installing steel pipe piping, improving piping efficiency.

(2) Since the main body is rotatable relative to the hose end, connection work is easy.

Next, the embodiments of the present invention described above will be described in detail with reference to the drawings.

In Fig. 1, (1) is the connection port for a hose end, etc. that is attached to the base or appliance plug, etc.
It has continuous smooth protrusions on the outer periphery and has been widely known and widely used. The connecting device according to the embodiment of the present invention that is compatible with this connection port includes a base screw 2, a tightening screw 3 mated to the base screw, a tightening ring 4 corresponding to these two screws, and a connection connected to the tightening screw. It is composed of a screw 5 and a cylindrical packing 6 that fits into the connection screw and externally fits into the connection port 1.

In the above, the base thread 2 has a cylindrical shape, and has a tapered part 7 formed at an appropriate position on its inner peripheral surface, and forms a threaded part 8 in an appropriate range on the outer periphery. This is provided with recessed portions 9, 9. The tightening screw 3 has a threaded portion 1 corresponding to the threaded portion 8.
0 is cut into one inner circumferential end, and a lock screw 11 is screwed through the threaded portion in the radial direction, and the lock screw is positioned so as to fit into the recessed portions 9 of the base screw 2. . Further, a tapered part 12 is provided in the middle of the inner circumference following the threaded part 10 of the tightening screw 3, and the tapered part faces the tapered part 7 of the base screw, as shown in FIG. A partially open tightening ring 4 is interposed between these tapered portions 7 and 12. Further, the inner diameter of the other end of the tightening screw is enlarged, and a ring-shaped groove 1 is formed in the enlarged diameter portion 13.
4 is excavated and a split ring 15 is inserted into the groove.

Next, the connecting screw 5 is attached to a cylindrical portion 1 which is fitted into the enlarged diameter portion at one end and has a ring-shaped groove 16 cut on the outer periphery.
7, and the other end has a female thread 18 that serves as a piping connection.
Further, a ring-shaped recess 19 of an appropriate depth is formed on the inner periphery of the cylindrical portion 17 and opens toward the end face side. The cylindrical packing 6 is made of a suitable material and consists of a base that can be fitted onto the connection port 1, and an annular tongue 20 following the base. 21
are continuous, and the connecting screw 5 is connected to the tightening screw 3.
When the tongue piece is fitted into the enlarged diameter part 13 of the tongue, the tongue piece enters into the recessed part 19.

To explain in more detail the case of connecting the steel pipe 2 to the rubber pipe connection port using the connection device detailed above, first, the base 23 of the cylindrical packing 6 is fitted onto the rubber pipe connection port 1, and then the Attach the base screw 2 and the tightening ring 4 to the outside in this order. Next, when the tightening screw 3 is screwed onto the base screw 2 with the lock screw 11 loosened, the tapered portions 7 and 12 come closer and these tapered portions abut against the tapered portions at both ends of the tightening ring 4. state. When the tightening screw 3 is further tightened, due to the action of the tapered portions 7 and 12 and the opening 24 in the tightening ring 4, the tightening ring reduces its diameter and the base 23 of the cylindrical packing 6. It is brought into pressure contact with the outer periphery of the rubber tube connection port 1 to ensure airtightness of the area.

When the tightening screw 3 reaches the appropriate amount,
When the lock screw 11 is screwed in by aligning the position of the lock screw 11 with any one of the plurality of recesses 9 formed on the outer periphery of the base screw 2, the base screw 2 and the screw are tightened while the airtight state is maintained. The attached screw 3 is fixed, and in this state, the annular tongue piece 2 of the cylindrical packing 6
0 is in a state of protruding into the enlarged diameter portion 3 of the tightening screw 3. Next, when the cylindrical portion 7 of the connecting screw 5 is fitted into the enlarged diameter portion, when the groove 16 and the groove 14 are aligned, the split ring 15 housed in the groove fits into the groove 16 and is tightened. The screw 3 and the connecting screw 5 are rotatably connected. At the same time, the annular tongue piece 20 of the cylindrical packing 6 fits into the recessed part 19, and
The expanded portion 21 at the tip is press-fitted into the recessed portion 19 to ensure airtightness of the connection portion between the two.

In this state, connect the steel pipe 22 with the female thread 18 of the screw 5.
When screwed in through a sealing material, it is connected to the steel pipe 22 in an airtight manner. Therefore, the gas pipe connection port 1 of the existing gas pipe and the gas pipe connection port 1 of the appliance stopper can be connected by a steel pipe.

In addition, since the connecting screw 5 can rotate independently of the cylindrical packing 6 while maintaining an airtight state, the screwing operation can be easily performed when screwing the steel pipe 22 into the connecting screw 5. The operating force from the operation does not affect the other side of the rubber tube connection port 1, and any adverse effects caused by the steel pipe connection work on the base plug, instrument stopper, or the vicinity of the rubber tube connection port 1 are prevented.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention, and Fig. 2 is a sectional view of an embodiment of the present invention.
It is a perspective view of the base screw 2 and the tightening ring 4, and in the figure, 1... Connection port, 2... Original thread, 3... Tightening screw, 4... Tightening ring, 5... Connection screw, 6 ……
Cylindrical packing, 7, 12...Tapered part, 19
...concavity, 20...circular tongue piece.

Claims (1)

[Scope of utility model registration request] A cylindrical base screw 2 and a tightening screw 3 are screwed into each other, and a tightening means is provided in which a tightening ring 4 having a C-shaped cross section is attached to the inner surface of the threaded portion of both, and a tightening means is provided in this tightening step. A cylindrical packing 6 consisting of a base 23 that is inserted and externally fitted onto the hose end, and an annular tongue piece 20 continuing to the tip thereof, a piping connection part on one side and a concave part 19 on the other end surface, and the outer periphery thereof. Groove 1 on the surface
A split ring 15 is attached to an enlarged diameter portion 13 provided at a position corresponding to the annular tongue piece 20 on the inner periphery of the tightening screw 3, and a connecting screw 5 is attached to the connecting screw 5.
When the concave groove disposed portion is fitted into the enlarged diameter portion 13, the split ring 15 is fitted into the concave groove 16, and the annular tongue piece 20 is fitted into the concave portion 19 in an airtight manner. A gas pipe connector in which the shape and position of the groove 16 are set.