JP2006118663A - Hose connection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To turnably and watertightly connect a hose connector to a hose. <P>SOLUTION: A pedestal ring 3 is fixed so that it cannot axially move in an axial appropriate position in a connection cylinder 1. By holding an elastic seal member 4 between a one end face 3a of the pedestal ring 3, and a terminal face A3 of the hose connector A axially facing it, and bringing the one end face 3a of the pedestal ring 3 and the terminal face A3 of the hose connector A into close contact, the one end face 3a of the pedestal ring 3 and the terminal face A3 of the hose connector are sealed via the elastic seal member 4. By turnably supporting a nipple 2 with respect to another end part 3b of the pedestal ring 3, the hose connector A attached to the connection cylinder 1 and the hose H are turnably connected. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a hose connection structure for connecting a hose to a hose connector such as a case where a water discharge device such as a shower head and a water supply fitting such as a water supply tap or a hot water mixing tap are connected by a hose.
Specifically, the connection end of the hose and the nipple inserted on the inner periphery thereof are inserted into the connection cylinder to which the end of the hose connector is attached by screwing or the like, and the inner surface of the connection cylinder On the other hand, the present invention relates to a hose connection structure in which a hose connection end and a nipple are brought into contact with and engaged in the hose axial direction to prevent the hose connection end and the nipple from coming off.

Conventionally, as this type of hose connection structure, a connecting cylinder (equipment connecting nut) and a caulking cylinder are sequentially inserted into the hose connection side, and a nipple bamboo child-like part is inserted into the inner periphery of the hose connection end. The caulking cylinder is inserted into the outer periphery of the caulking cylinder so that the caulking cylinder is integrally inserted with the hose connection end interposed therebetween, and then the hose or connection is made so that the outer side of the caulking cylinder is covered with the connecting cylinder. The hose connection end part and the crimping cylinder are moved by moving the cylinder and abutting and engaging the locking projection provided on the inner peripheral surface of the end of the connection cylinder and the base end of the crimping cylinder. In addition, there is one in which a distal end portion of a water discharge device (shower head) is rotatably prevented from coming off with respect to a connection cylinder body (see, for example, Patent Document 1).
In addition, a connecting cylinder (equipment connecting nut) and a caulking cylinder are sequentially inserted into the hose connection side, and a bamboo cuboid part of the nipple is inserted into the inner circumference of the hose connection end, and then a caulking cylinder is placed around the outer circumference. By inserting and inserting, the caulking cylinder is integrally inserted with the hose connection end portion interposed therebetween, and then the hose or the connecting cylinder is moved so as to cover the outer side of the caulking cylinder with the connecting cylinder, The hose connection end and the caulking cylinder are connected to a water supply fitting (water faucet fitting) by engaging and engaging the locking projection protruding from the inner peripheral surface of the end of the connection cylinder and the base end of the caulking cylinder. There is one in which a distal end portion of the connecting member is rotatably prevented from coming off with respect to the connecting cylinder body (see, for example, Patent Document 2).

Japanese Utility Model Publication No. 2-13832 (page 1, FIGS. 5 and 6) Japanese Utility Model Publication No. 1-40397 (first page)

However, in such a conventional hose connection structure, the hose is rotatably prevented from coming off with respect to the connection cylinder body to which the end of the hose connector of the water discharge device or the water supply fitting is screwed. Even if the hose is twisted, it rotates in the opposite direction (spinning) and does not crush or break, ensuring an internal flow path, but this rotating structure consists of the end of the hose connector and the tip of the nipple. Since the hose is pushed into the connecting cylinder toward the end of the hose connector, the nipple can be reciprocated by the distance between them. If this process is repeated, there is a problem that the packing between the two wears out and water leakage may occur.
Moreover, a shower head manufactured in a foreign country has a connection structure that prevents water leakage by bringing a flat packing into close contact with the end face of the shower head, but in the conventional hose connection structure, the end face of the shower head faces the end face. When the flat packing is sandwiched between the nipples and brought into close contact with each other, the frictional resistance makes it impossible for the nipple and the hose connection end to rotate with respect to the connecting cylinder, preventing the hose from being twisted.

The invention according to claim 1 of the present invention aims to connect the hose connector and the hose in a rotatable and watertight manner.
In addition to the object of the invention described in claim 1, the invention described in claim 2 is intended to install the pedestal ring with a simple structure without blocking the rotation of the nipple.
In addition to the object of the invention described in claim 1 or 2, the invention described in claim 3 aims to smoothly rotate the nipple against the base ring while preventing rattling.

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is such that a pedestal ring is fixedly disposed in an appropriate position in the axial direction in the connecting cylinder so as not to move in the axial direction, and one end surface of the pedestal ring is provided. And an end face of the hose connector opposite to the axial direction of the hose connector so as to be in close contact with one end surface of the pedestal ring and the end surface of the hose connector, respectively, and the other end of the pedestal ring. The nipple is rotatably supported with respect to the portion.
The invention according to claim 2 adds a configuration in which a stepped portion that engages with the outer peripheral portion of the pedestal ring in the axial direction is formed on the inner peripheral surface of the connection cylindrical body to the configuration of the invention according to claim 1. It is characterized by.
According to a third aspect of the present invention, the other end portion of the pedestal ring and the end portion of the nipple are fitted to the configuration of the first or second aspect of the invention so as to face each other in the radial direction, and both sides thereof are fitted. It is characterized in that a configuration in which it is freely engaged by sliding is added.

According to the present invention, the pedestal ring is fixedly disposed at an appropriate position in the axial direction in the connecting cylinder so as not to move in the axial direction, and one end surface of the pedestal ring and a hose facing the axial direction thereof. An elastic sealing material is sandwiched between the end face of the connection tool and brought into close contact with the one end face of these pedestal rings and the end face of the hose connection equipment, so that the one end face of the pedestal ring and the end face of the hose connection equipment are elastic. The hose connector attached to the connecting cylinder and the hose are rotatably connected by being sealed through a sealing material and rotatably supporting the nipple with respect to the other end of the pedestal ring.
Therefore, the hose connector and the hose can be rotated and connected in a watertight manner.
As a result, even if the hose is pushed into the connecting cylinder, it is directed toward the end of the hose connector as compared to the conventional one in which the end of the hose connector and the nipple are separated from each other in the axial direction so as to face each other. As a result, the amount of movement of the nipple can be reduced, so that the occurrence of water leakage can be reliably prevented, and at the same time, the internal flow path can be secured by preventing the hose from being crushed or broken.
Furthermore, even a shower head manufactured in a foreign country can be prevented from being crushed or broken due to water leakage or twisting of a hose, and can be used on an existing hanger manufactured in Japan.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, this step portion is formed by forming a step portion that engages with the outer peripheral portion of the base ring in the axial direction on the inner peripheral surface of the connection cylinder. By simply engaging the outer periphery of the pedestal ring, the positioning can be ensured.
Therefore, the pedestal ring can be installed with a simple structure without blocking the rotation of the nipple.

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, the other end portion of the pedestal ring and the end portion of the nipple are fitted so as to face each other in the radial direction, and both surfaces thereof are slid. By being engaged with each other so as to be rotatable, the nipple is rotatably supported without misalignment with respect to the other end portion of the pedestal ring.
Therefore, the nipple with respect to the base ring can be smoothly rotated while preventing backlash.

  As shown in FIGS. 1 to 4, the hose connection structure of the present invention connects one connection end H <b> 1 of the hose H to the terminal end A <b> 1 of a water discharge device such as a shower head as the hose connector A, and Connect the connection end H1 as a hose connector A to the end A2 of a water fitting such as a water tap or hot water mixing tap, or the end A1 of the water discharge device and the end of a water fitting such as a water tap or hot water mixing tap This is suitable for use as a shower hose connection structure in which the connection end H1 of the hose H is connected to only one of the parts A2.

  And this hose connection structure consists of the connecting tube 1 to which the end portions A1 and A2 of the hose connector A of the water discharge device and the water supply fitting are attached, and the hose connection end inserted into the inside of the connecting tube 1. H1 and a nipple 2 inserted on the inner periphery thereof, and through one opening 1a of the connection cylinder 1 through the hose connection end H1 and the nipple 2 integrated therewith, the connection cylinder The nipple 2 and the hose connection end H1 are rotatably supported by abutting and engaging a part of the nipple 2 in the hose axial direction with respect to the inner surface of 1, and the other opening of the connection cylinder 1 It keeps coming off from 1b.

  The connecting cylinder 1 is formed in a cylindrical shape having an appropriate thickness with a material such as hard synthetic resin or metal, for example, and in one opening 1a as a means for attaching the hose connector A, a shower head or the like. The external screw engraved at the end A1 of the water discharge device or the internal screw that engages with the external screw engraved at the end A2 of the water supply fitting such as a water faucet or hot water mixing tap is engraved. It is joined to the detachment itself by screwing.

  A pedestal ring 3 is fixedly disposed in an appropriate position in the axial direction in the connecting cylinder 1 so as not to move in the axial direction, and one end face 3a of the pedestal ring 3 and the end of the hose connector A facing the axial direction thereof. A space portion S1 having a predetermined interval is formed between the surface A3 and the surface A3, and an elastic sealing material 4 is sandwiched in the space portion S1 so that the one end surface 3a of the base ring 3 and the end surface A3 of the hose connector A And close to each other.

  As a fixing method of the pedestal ring 3, it is preferable to form and position a step portion 1c that engages with the other outer peripheral portion 3c of the pedestal ring 3 in the axial direction on the inner peripheral surface of the connection cylinder 1, and this pedestal is positioned. On the outer peripheral surface of the ring 3, for example, an annular sealing material 5 such as an O-ring is interposed to stop water from leaking from the inner peripheral surface of the connecting cylinder 1.

  Further, as shown in FIGS. 1 and 2, the other end 3b of the pedestal ring 3 is fitted to the one end 2a of the nipple 2 so as to face each other in the radial direction, and these both sides are brought into sliding contact with each other. Or the other end 3b and one end 2a of the nipple 2 are opposed to each other in the axial direction through the gap S2 as shown in FIGS. 3 and 4, or The nipple 2 is rotatably supported by other structures.

  The nipple 2 is formed in a cylindrical shape using, for example, a metal such as stainless steel or a hard synthetic resin, and is inserted into the inner circumference of the hose connection end H1, and the caulking cylinder 6 shown in FIGS. Or by the holding cylinder 8 shown in FIGS. 3 and 4 so as to be integrated with the hose connection end H1.

The hose H is preferably a spiral reinforced hose in which a reinforcing material is spirally wound around an intermediate layer.
Other than that, between the outer layer and the inner layer, only one of the band-shaped reinforcing material having a rectangular cross section and the linear reinforcing material having a circular cross section is wound to be integrated, or, for example, a thread-shaped reinforcing material such as glass fiber or flame retardant fiber. It is also possible to use a conventionally known soft hose that is braided or spirally wound and integrated, or a single layer structure.

Next, the effect of such a hose connection structure will be described.
In addition, since the case where the hose connection end H1 is connected to the terminal end A1 of the water discharge device such as the shower head described above is the same as the terminal end A1 of the water supply fitting such as the water supply tap or the hot water mixing tap, Only the connection to the terminal end A1 of the appliance is shown, and the connection to the terminal end A1 of the water supply fitting is omitted.

First, as shown in FIG. 2 (b) and FIG. 4 (b), after inserting the hose connection end H1 and the nipple 2 into the inside from one opening 1a of the connection cylinder 1, the base ring 3 is inserted, If the elastic sealing material 4 and the end portion A1 of the hose connector A are subsequently screwed together, the one end face 3a of the pedestal ring 3 and the hose connector A as shown in FIGS. Since the elastic sealing material 4 is sandwiched between and closely contacted with the end surface A3, the one end surface 3a of the base ring 3 and the end surface A3 of the hose connector A are sealed through the elastic sealing material 4.
In FIG. 3, the water that has entered from the gap S <b> 2 between the other end 3 b of the pedestal ring 3 and the one end 2 a of the nipple 2 is stopped by the annular sealing material 5 interposed on the outer peripheral surface of the pedestal ring 3. The

At the same time, the nipple 2 is rotatably supported with respect to the other end 3b of the pedestal ring 3, so that the hose connector A and the hose H attached to the connecting cylinder 1 are rotatably connected. .
As a result, the end face A3 of the hose connector A and the hose H can be rotated and connected in a watertight manner.

Moreover, if the step part 1c engaged with the other outer peripheral part 3c of the base ring 3 to an axial direction is formed in the inner peripheral surface of the said connection cylinder 1, the other outer peripheral part 3c of the base ring 3 will be formed in this step part 1c. By simply engaging, position displacement to the nipple 2 side is prevented and positioning can be performed reliably.
As a result, the base ring 3 can be installed with a simple structure without preventing the nipple 2 from rotating.
Embodiments of the present invention will be described below with reference to the drawings.

  In Example 1, as shown in FIGS. 1 and 2A and 2B, the hose H is a reinforcing material between the opaque inner layer Ha and the transparent outer layer Hb, and at least the surface has a metallic color. This shows a case of a spiral reinforcing hose (forlan hose) in which a rectangular belt-shaped reinforcing material Hc and a linear reinforcing material Hd having a circular cross section are spirally wound and integrated.

  In this case, the nipple 2 is made of a rigid material such as stainless steel or aluminum, and is formed in a cylindrical shape having a slightly smaller diameter than the inner diameter of the hose H or a thin wall having substantially the same diameter. A caulking cylinder 6 formed of a rigid material such as stainless steel or aluminum is inserted and attached, and is compressed and deformed by pressure but not restored and deformed by the repulsive force from the hose H, and these are brought into close contact with each other.

  This caulking cylinder 6 is formed in a substantially U-shaped cross section covering from the outer peripheral surface H2 of the hose connection end H1 to the inner peripheral surface H4 via the cutting surface H3, and the tip of the inner cylindrical portion 6a is formed on the nipple 2 It arrange | positions in an axial direction intermediate position, and forms the level | step difference 6b between these both.

  Then, as shown in FIGS. 2 (a) and 2 (b), in the state where the hose connection end H1 is fitted and inserted into the annular recess formed between the inner cylinder part 6a and the outer cylinder part 6c, The axially intermediate position of the opposed outer cylinder part 6c is partially reduced in diameter by caulking, for example, by a drive or manual hydraulic caulking machine (not shown).

  Further, the other end 6d of the outer cylinder portion 6c of the caulking cylinder 6 is held in an expanded state by the caulking process described above, and the other opening 1b of the connection cylinder 1 facing the expanded other end 6d. In FIG. 1, an annular locking projection 1d is projected inward, and in the completed state shown in FIG. 1, the other end 6d of the caulking tube 6 and the locking projection 1d of the connecting tube 1 are engaged with each other. To prevent it from rotating freely.

  Accordingly, in the first embodiment, the hose connection end H1 is fitted and inserted into the annular recess formed between the inner tube portion 6a and the outer tube portion 6c of the crimping tube 6, and then the tip and the nipple of the inner tube portion 6a are fitted. 2, the axially intermediate portion of the outer cylinder portion 6 c facing the step 6 b is squeezed to partially reduce the diameter so that the hose connection end H 1 is increased in the thickness direction between the squeezed portion and the step 6 b. The inner surface H4 of the hose connection end H1 is deformed into a step shape along the step 6b and is compressed along the inner surface H4 of the hose connection end H1. The invading fluid is stopped, and the intruding fluid along the outer peripheral surface H2 of the hose connection end H1 is stopped at the caulking portion.

  As a result, in addition to the above-described effects, even if a hose H having a large wall thickness, such as a Forlan hose, is connected and can be compressed and deformed, a high pull-out strength can be obtained, and leakage and intrusion of fluid from the hose can be prevented. Even if the outer layer Hb is a transparent hose H that can be completely prevented, there is an advantage that the transparency of the hose H can be maintained over a long period of time and the commercial value can be maintained.

  Further, one end 2a of the nipple 2 is formed to project from the caulking tube 6 toward the pedestal ring 3 in a cylindrical shape, and the other end 3b of the pedestal ring 3 is radially extended along the inner peripheral surface thereof. While being fitted so as to face each other, these two surfaces are slidably engaged with each other, and between the outer peripheral surface of the one end 2a and the inner peripheral surface of the connection cylinder 1, for example, A waterproof packing 7 such as a U-packing is attached to stop the water.

  As a result, the nipple 2 is rotationally supported without misalignment with respect to the other end 3b of the pedestal ring 3, and there is also an advantage that the nipple 2 with respect to the pedestal ring 3 can be smoothly rotated while preventing rattling.

  In Example 2, as shown in FIGS. 3 and 4 (a) and 4 (b), the hose H is integrally wound by spirally winding a blade (reinforcing yarn) He as a reinforcing layer between the inner layer Ha and the outer layer Hb. The case where it is the laminated hose (blade hose) which was made is shown.

  In this case, the nipple 2 is formed in a thick cylindrical shape with, for example, a hard synthetic resin and the other end portion of the pedestal ring 3 formed in a disk shape by flatly forming one end portion 2a thereof. 3b, and an annular projection 2b protruding from the outer circumferential surface at an axially intermediate position between the one end 2a side and the inner circumferential surface of the connecting cylinder 1 from the annular projection 2b. For example, a waterproof packing 7 such as a U-packing is attached to stop the water, and a bamboo cocoon-shaped portion 2c is integrally formed at the other end portion inserted into the inner periphery of the hose connection end portion H1.

  Then, as shown in FIG. 4 (a), after the bamboo slab portion 2b of the nipple 2 is inserted and the hose connection end H1 is partially expanded, the thickness is thin with a metal such as stainless steel or a hard constituent resin, for example. The presser cylinder 8 formed in a cylindrical shape is forcibly moved to the annular protrusion 2b along the outer peripheral surface H2 of the expanded hose connection end H1 and inserted, and the hose connection end H1 is sandwiched. The presser cylinder 8 is integrally attached to the outer periphery.

  Further, as shown in FIG. 4B, in the completed state shown in FIG. 3 by inserting the hose connection end H1 and the nipple 2 into the connection cylinder 1, the other end 8a of the presser cylinder 8 is connected to the connection cylinder. Abutment engagement with one locking projection 1d is prevented from coming off freely.

  Therefore, this embodiment 2 has the advantage that if the hose H is not a special structure, the overall structure is simplified and the number of parts can be reduced and the manufacturing cost can be reduced correspondingly compared to the above-described embodiment 1. There is.

  In the previous embodiment, the hose connection structure according to the present invention has both the connection ends H1 and H1 of the hose H, the terminal A1 of a water discharge device such as a shower head, and a water supply fitting such as a water supply tap and a hot water mixing tap. Although the case where it is a hose connection structure for a shower hose that is connected to each of the end portions A2 is shown, the present invention is not limited to this and may be used to connect other industrial hoses and the like.

  Further, although not shown in the second embodiment, one end 2a of the nipple 2 is fitted to the inner peripheral surface of the pedestal ring 3, and the both sides are slidably engaged to engage with each other in a freely rotating manner, or a connecting cylinder. A locking projection 1d that engages with the tip of the annular projection 2b is formed on the inner peripheral surface of the annular projection 2b. good.

It is a vertical front view of the hose connection structure which shows one Example of this invention. It is a partial vertical front view which shows a decomposition | disassembly state, (a) And (b) has shown the assembly | attachment middle in order of a process. It is a vertical front view of the hose connection structure which shows the other Example of this invention. It is a partial vertical front view which shows a decomposition | disassembly state, (a) And (b) has shown the assembly | attachment middle in order of a process.

Explanation of symbols

A hose connector A1, A2 end portion A3 end surface H hose H1 hose connection end portion H2 outer peripheral surface H3 cut surface H4 inner peripheral surface Ha inner layer Hb outer layer Hc strip-shaped reinforcing material Hd linear reinforcing material He blade S1 space portion S2 gap 1 Connection cylinder 1a One opening 1b The other opening 1c Step 1d Locking protrusion 2 Nipple 2a End (one end)
2b Annular projection 2c Bamboo child-like part 3 Base ring 3a One end face 3b The other end part 3c Outer peripheral part (the other outer peripheral part)
4 Elastic seal material 5 Annular seal material 6 Caulking tube 6a Inner tube 6b Step 6c Outer tube 6d Other end 7 Waterproof packing 8 Presser tube 8a Other end

Claims (3)

Inside the connecting cylinder (1) to which the end parts (A1, A2) of the hose connector (A) are attached, the connecting end part (H1) of the hose (H) and the nipple ( 2) is inserted, and the hose connection in which the hose connection end (H1) and the nipple (2) are brought into abutment engagement in the hose axial direction with respect to the inner surface of the connecting cylinder (1) to prevent the hose connection from rotating freely. In structure
A pedestal ring (3) is fixedly disposed in a suitable position in the axial direction in the connecting cylinder (1) so as not to move in the axial direction, and is opposed to one end surface (3a) of the pedestal ring (3) in the axial direction. The elastic sealing material (4) is sandwiched between the end surface (A3) of the hose connector (A) to be used, and the one end surface (3a) of these pedestal rings (3) and the end surface of the hose connector (A) ( A hose connection structure characterized in that the nipple (2) is rotatably supported with respect to the other end (3b) of the pedestal ring (3) while being in close contact with each of A3). The hose connection structure according to claim 1, wherein a stepped portion (1c) that engages with the outer peripheral portion (3c) of the pedestal ring (3) in the axial direction is formed on the inner peripheral surface of the connecting cylinder (1). The other end portion (3b) of the pedestal ring (3) and the end portion (2a) of the nipple (2) are fitted so as to face each other in the radial direction, and can be rotated by sliding the both surfaces. The hose connection structure according to claim 1 or 2, wherein the hose connection structure is engaged.

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