JP3054493U - Flexible pipe connection structure - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a pipe connection structure that can connect a flexible pipe directly to a female screw with good appearance, with the female screw being an object to be connected. SOLUTION: While a cylindrical male screw 4 is inserted into a flexible pipe 1, an outward flange 5 for connecting the end of the cylindrical male screw 4 to the end of the flexible pipe 1 is continuously provided. With the seal packing 6 interposed between the orientation flange 5 and the packing receiving seat 2 on the female screw 3 side,
The cylindrical male screw 4 is screwed onto the female screw 3 and the cylindrical male screw 4
The seal packing 6 is sandwiched between the end face of the seal packing 2 and the packing receiving seat 2 and via the outward flange 5.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a flexible pipe connection structure for various faucet devices such as faucets and mixing taps for hot and cold water and piping.

[0002]

[Prior art]

 As the above-mentioned flexible pipe, one having a chevron portion and a valley portion alternately in the axial direction, one having a chevron portion and a valley portion in a spiral shape in the axial direction, and further having an end portion Some have a straight pipe portion. For example, there is a configuration shown in FIGS. 9 and 10 as a connection structure of a flexible pipe having a mountain portion and a valley portion alternately provided in the axial direction.

The connection structure B of the flexible pipe has a male thread 11 to be connected to the pipe, and a union nut 12 screwed to the male thread 11 is fitted on both ends of the flexible pipe 1. The end of the pipe is compressed and deformed to form an outward flange 5 for locking the union nut 12, and a seal packing 6 is interposed between the outward flange 5 and the end face of the male screw 11. In the mounted state, a union nut 12 is screwed onto the male screw 11, and the seal packing 6 is sandwiched between the union nut 12 and the end face of the male screw 11 and via the outward flange 5. Is configured.

In the connection structure B of the flexible pipe, since the pipe connection target is the male screw 11, as shown in FIG. 11, the pipe connection target is, for example, a female screw loosely held by the cheese 14 (shown in FIG. 11). In the case of the union nut 3), a male screw type socket 13 is separately prepared, and for example, a sealing tape is wrapped around the screw portion of the socket 13 or a liquid seal which hardens over time is used. It is applied, and one end of the socket 13 is screwed to the female screw 3 to be connected to the pipe, while the union nut 12 held by the flexible pipe 1 is screwed to the other end of the socket 13. I didn't get it.

[0005]

[Problems to be solved by the invention]

 However, in the connection structure B, not only the male screw type socket 13 is required, but also the socket 13, the female screw 3, and the union nut 12 need to be sealed in two steps with troublesome work. In addition, there is a problem in that the presence of the socket 13 deteriorates the appearance of the pipe connection.

The present invention has been made in view of such circumstances, and has as its object to eliminate the need for a male screw type socket even if the pipe connection target is a female screw. The point is to provide an innovative pipe connection structure that allows flexible pipes to be connected with good appearance.

[0007]

[Means for Solving the Problems]

 The technical measures taken by the present invention to achieve the above object are as follows. That is, the invention according to claim 1 provides a connection structure of a flexible pipe to a female screw, wherein a cylindrical male screw screwed to the female screw is inserted into the flexible pipe, and the end of the flexible pipe is attached to the end of the flexible pipe. An external flange for connecting the end of the cylindrical male screw is provided continuously, and a cylindrical male screw is screwed into the female screw in a state where a seal packing is interposed between the outward flange and the packing receiving seat on the female screw side. It is characterized in that the seal packing is clamped by the end face of the cylindrical male screw and the packing receiving seat and through the outward flange.

According to a second aspect of the present invention, as a flexible pipe connection structure for connecting a flexible pipe having a straight pipe portion at an end to a female screw, a cylindrical male screw screwed to the female screw is provided. On the other hand, an outward flange for bringing the end of the cylindrical male screw into contact with an end of the pipe portion is connected to the end of the pipe portion, and the outward flange and the packing on the female screw side are connected. A cylindrical male screw is screwed into the female screw with a seal packing interposed between the receiving screw and the receiving seat, and the end face of the cylindrical male screw and the packing receiving seat are connected to each other through an outward flange. It is characterized in that the seal packing is sandwiched.

According to a third aspect of the present invention, as a connection structure for a female screw of a flexible pipe having a straight pipe portion at an end, a cylindrical male screw screwed to the female screw is inserted into the straight pipe portion. On the other hand, an outward flange for abutting the end of the cylindrical male screw is connected to the end of the pipe portion, and the end of the cylindrical male screw is abutted on the outward flange. An annular concave groove is formed in each of the straight pipe portions in a portion where the male external thread is fitted and a portion outside the male screw region. The seal packing that is in close contact with the inner surface is locked and held, and a positioning member for a cylindrical male screw is provided in the annular groove at a position outside the fitting range, and the cylindrical male screw is connected via a sealing material. Said female screw in The feature is that it is configured to be screwed.

[0010] In the pipe connection structure according to any one of claims 1 to 3, the flexible pipe used for these pipes is provided with a mountain-shaped portion and a valley-shaped portion alternately in the axial direction. May be provided spirally in the axial direction (claim 4 or 5).

[0011] The invention according to claim 6 is that, as a connection structure for a female screw of a flexible pipe, which is provided with an angled portion and a valley portion alternately in an axial direction, a cylindrical male screw screwed to the female screw is provided. An outer flange for connecting the end of the cylindrical male screw is connected to the end of the flexible pipe while the end of the cylindrical male screw is in contact with the outer flange. The seal packing and the positioning member of the cylindrical male screw are respectively engaged with and held by the valley-shaped portion of the flexible pipe, and the cylindrical male screw is interposed through a sealing material. It is characterized in that it is configured to be screwed to a female screw.

In the pipe connection structure according to the third or sixth aspect, a seal tape made of a synthetic resin or a liquid seal that hardens with the passage of time may be used as the seal material.

In any of the inventions described in claims 1 to 3 and the invention described in claim 6, when the flexible pipe is provided with the cylindrical male screw, the connection target of the flexible pipe is the female screw. This flexible pipe can be directly connected to the female screw.

That is, when the connection target is a female screw, a male screw type socket is not required, and therefore, the labor for sealing can be reduced, and the flexible pipe can be connected to the female screw with a good appearance.

[0015]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a flexible pipe 1 provided with male thread type pipe connection structures A, A at both ends according to a first embodiment, and this flexible pipe 1 has a chevron section a and a trough section b in the axial direction. Alternately.

As shown in FIGS. 2 and 3, the pipe connection structure A is, for example, a female screw (union nut in the illustrated example) loosely held by a cheese 14 to be connected. A cylindrical male screw 4 having a hexagonal head 4 a screwed to the female screw 3 is fitted over the flexible pipe 1, and a chevron part a and a valley part b at the end of the flexible pipe 1 are connected. An outward flange 5 is formed by compression deformation so that the end of the cylindrical male screw 4 abuts.

Then, a seal packing 6 is seated on a packing receiving seat (the end surface of the cheese 14 in the illustrated example) 2 on the female screw 3 side, and a cylindrical male screw 4 is screwed on the female screw 3. The flexible pipe 1 can be connected to the female screw 3 in a watertight manner by sandwiching the seal packing 6 between the end face of the sealing pipe 4 and the packing receiving seat 2 and via the outward flange 5. I have.

In this embodiment, the flexible pipe 1 is provided with a mountain-shaped portion a and a valley-shaped portion b alternately in the axial direction. However, as shown in FIG. The present invention can be applied to a flexible pipe 1 having a chevron portion a and a valley portion b spirally arranged in the axial direction.

FIG. 4 shows a modified example, in which the above-described male screw type pipe connection structure A and the pipe connection structure B using the union nut 12 shown in FIG. 10 are provided at both ends of the flexible pipe 1. A flexible pipe 1 having pipe connection structures A and B according to another embodiment, a flexible pipe 1 having pipe connection structures A and A shown in FIG. 1, and a pipe connection by a union nut 12 shown in FIG. If three types of flexible pipes 1 having the structures B and B are prepared, the connection target at both ends of the flexible pipe 1 may be a combination of female threads or a combination of female threads and male threads. Alternatively, even if the combination of the external threads is used, the flexible pipe 1 should be directly connected with good appearance over them. Can be.

FIG. 5 shows a pipe connection structure A according to a second embodiment. The pipe connection structure A is for connecting a female screw 3 having no packing seat inside to the flexible pipe 1, In addition, the flexible pipe 1 is intended to be a flexible pipe 1 having a mountain-shaped portion a and a valley-shaped portion b alternately arranged in the axial direction. The cylindrical male screw 4 screwed to the female screw 3 is connected to the flexible pipe 1 The outer flange 5 is formed by compressing and deforming the angled portion a and the grooved portion b at the end of the flexible pipe 1 so that the end of the cylindrical male screw 4 abuts. I have.

Then, with the end of the cylindrical male screw 4 abutting against the outward flange 5, the seal packing 7 which is in close contact with the inner surface of the cylindrical male screw 4 is fitted to the valley portion b of the flexible pipe 1. And a positioning member (for example, an E-ring) 8 for holding the cylindrical male screw 4 with the outward flange 5 is locked and held on the valley-shaped portion b of the flexible pipe 1. The flexible pipe 1 can be connected to the female screw 3 in a watertight manner by screwing the cylindrical male screw 4 to the female screw 3 via a sealing material 9.

FIG. 6 shows a flexible pipe 1 provided with pipe connection structures A, A according to a third embodiment. The pipe connection structure A is, for example, a female screw loosely held by a cheese 14 (in the illustrated example, The union nut 3 is connected to the flexible pipe 1 having a straight pipe portion 1a at the end.

That is, as shown in FIG. 7, a cylindrical male screw 4 screwed to the female screw 3 is inserted into the pipe portion 1a of the straight while the end of the pipe portion 1a is fitted with the cylindrical screw. An outward flange 5 for contacting the end of the male screw 4 is provided continuously.

Then, a seal packing 6 is seated on a packing receiving seat (the end surface of the cheese 14 in the illustrated example) 2 on the female screw 3 side, and a cylindrical male screw 4 is screwed on the female screw 3. The flexible pipe 1 can be connected to the female screw 3 in a watertight manner by sandwiching the seal packing 6 between the end face of the sealing pipe 4 and the packing receiving seat 2 and via the outward flange 5. I have.

In this embodiment, the flexible pipe 1 is provided with a chevron portion a and a valley portion b spirally in the axial direction, as shown in FIGS. As described above, the present invention can be applied to a configuration in which the chevron portions a and the trough portions b are alternately provided in the axial direction.

FIG. 8 shows a pipe connection structure A according to a fourth embodiment. The pipe connection structure A has a female screw 3 having no packing seat inside, and a straight pipe portion 1a at an end. A tubular male screw 4 screwed to the female screw 3 is inserted into the straight pipe portion 1a, and the tubular male screw is attached to an end of the pipe portion 1a. An outward flange 5 for connecting the ends of the flanges 4 is connected.

With the end of the cylindrical male screw 4 in contact with the outward flange 5, a straight pipe portion 1 a at a portion where the cylindrical male screw 4 is fitted and a portion slightly deviated from the fitted range. Then, annular concave grooves c and d are respectively formed, and the seal packing 7 which is in close contact with the inner surface of the cylindrical male screw 4 is locked and held in the annular concave groove d within the male screw-fitting range. On the other hand, a positioning member 8 for sandwiching the cylindrical male screw 4 with an outward flange 5 is provided in the annular groove c at a position outside the fitting range, and the cylindrical member c By screwing the male screw 4 to the female screw 3, the flexible pipe 1 can be connected to the female screw 3 in a watertight manner.

As the seal material 9, for example, a seal tape, a liquid seal that hardens with time, or the like is selected.

In the embodiment shown in FIG. 1 and FIG. 6, the pipe connection structures A, A having the same structure are provided at both ends of the flexible pipe 1, respectively. In the above, the pipe connection structures A and A having different structures may be provided.

In the embodiment shown in FIGS. 3 and 7, the female screw 3 to be connected to the flexible pipe 1 is a union nut loosely held by the cheese 14, and the end face of the cheese 14 is Although the seal packing 6 is seated on the packing receiving seat 2, a female screw 3 having a packing receiving seat therein may be used as a connection target of the flexible pipe 1.

[0031]

[Effect of the invention]

 As described above, in the case where the connection target of the flexible pipe is a female screw, any of claims 1 to 3 and the invention according to claim 6 do not require a male screw type socket. The flexible pipe can be directly connected to this female screw with good appearance by reducing the sealing work.

[Brief description of the drawings]

FIG. 1 is a perspective view of a flexible pipe having a pipe connection structure according to a first embodiment.

FIG. 2 is a perspective view of a pipe connection structure according to the first embodiment, in which a part is taken out and enlarged.

FIG. 3 is a sectional view of a pipe connection structure and a female screw according to the first embodiment;

FIG. 4 is a perspective view of a flexible pipe including the pipe connection structure according to the first embodiment and a conventional pipe connection structure using a union nut.

FIG. 5 is a sectional view of a pipe connection structure and a female screw according to a second embodiment.

FIG. 6 is a perspective view of a flexible pipe having a pipe connection structure according to a third embodiment.

FIG. 7 is a sectional view of a pipe connection structure and a female screw according to a third embodiment.

FIG. 8 is a sectional view of a pipe connection structure and a female screw according to a fourth embodiment.

FIG. 9 is a perspective view of a conventional flexible pipe having a pipe connection structure using a union nut to which a male screw is to be connected.

FIG. 10 is a cross-sectional view of a conventional pipe connection structure using a union nut and a male screw.

FIG. 11 is a perspective view showing a state of socket connection with a female screw of a conventional pipe connection structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Flexible pipe, 1a ... Straight pipe part, 2 ... Packing receiving seat, 3 ... Female screw, 4 ... Cylindrical male screw, 5 ... Outward flange, 6, 7 ... Seal packing, 8
... positioning member, 9 ... sealing material, a ... mountain-shaped portion, b ... valley-shaped portion, c, d ... annular concave groove.

Claims (8)

[Utility model registration claims] In a connecting structure of a flexible pipe to a female screw, a cylindrical male screw screwed to the female screw is inserted into the flexible pipe, and an end of the cylindrical male screw is attached to an end of the flexible pipe. An outward flange to be contacted is continuously provided, and a cylindrical male screw is screwed onto the female screw in a state where a seal packing is interposed between the outward flange and the packing receiving seat on the female screw side, and A connection structure for a flexible pipe, characterized in that the seal packing is sandwiched between an end face of a male screw and a packing seat and through an outward flange. 2. A flexible pipe connection structure for connecting a flexible pipe having a straight pipe portion at an end to a female screw, wherein a cylindrical male screw screwed to the female screw is connected to the straight pipe portion. On the other hand, an outward flange for abutting the end of the cylindrical male screw is provided at the end of the pipe portion, and a seal is provided between the outward flange and the packing receiving seat on the female screw side. With the packing interposed, a cylindrical male screw is screwed onto the female screw, and the seal packing is sandwiched between the end face of the cylindrical male screw and the packing receiving seat, and via an outward flange. A connection structure for a flexible pipe, comprising: 3. A connecting structure for a female pipe of a flexible pipe having a straight pipe portion at an end portion, wherein a cylindrical male screw screwed to said female screw is inserted into said straight pipe portion, and At the end, an outward flange for abutting the end of the cylindrical male screw is continuously provided, and in a state where the end of the cylindrical male screw is abutted on the outward flange, the fitting range of the cylindrical male screw is set. An annular groove is formed in each of the straight pipe portions outside the inner and outer fitting areas, and a seal packing that is in close contact with the inner surface of the cylindrical external thread is formed in the annular groove within the outer male screwing area. In addition to locking and holding, a positioning member for a cylindrical male screw is provided in the annular concave groove at a position outside the fitting range, and
A connection structure for a flexible pipe, wherein the cylindrical male screw is screwed to the female screw via a sealing material. 4. The flexible pipe connection structure according to claim 1, wherein the flexible pipe comprises a mountain-shaped portion and a valley-shaped portion alternately in the axial direction. 5. The flexible pipe connection structure according to claim 1, wherein the flexible pipe includes a chevron portion and a valley portion spirally extending in the axial direction. 6. A connection structure for an internal thread of a flexible pipe, which is provided with an angled portion and a valley portion alternately in an axial direction, wherein a cylindrical external thread screwed to the internal thread is inserted into the flexible pipe, At the end of the flexible pipe, an outward flange for abutting the end of the cylindrical male screw is continuously provided, and in a state where the end of the cylindrical male screw abuts on the outward flange, the cylindrical male screw is The sealing gasket and the positioning member of the cylindrical male screw that are in close contact with the inner surface of the flexible pipe are respectively locked and held in the valley-shaped portion of the flexible pipe, and the cylindrical male screw is screwed to the female screw via a sealing material. A connection structure for a flexible pipe, comprising: 7. The flexible pipe connection structure according to claim 3, wherein the sealing material is a sealing tape made of a synthetic resin. 8. The connection structure for a flexible pipe according to claim 3, wherein the sealing material is a liquid seal that hardens as time passes.