JP4791853B2 - Pipe fitting - Google Patents

Description

  The present invention relates to a pipe joint for connecting a connecting pipe used for, for example, a faucet instrument.

  Conventionally, as this kind of pipe joint, an insertion hole into which a connection pipe is inserted is formed, and a confirmation window for confirming from outside whether or not the connection pipe is normally inserted into this insertion hole is known. It has been. (See Patent Document 1). In this Patent Document 1, since the confirmation window is opened so as to communicate from the inside of the insertion hole to the outer peripheral surface, a part of the connection pipe inserted into the insertion hole can be directly visually confirmed through the confirmation window. ing. However, in such a pipe joint, when connecting a connecting pipe in a dark place such as under the floor of a building, it is difficult to see the inside of the insertion hole even when looking through the confirmation window, and it is difficult to check the insertion state of the connecting pipe. Moreover, in order to provide the pipe joint with the confirmation window, it is necessary to perform a new process on the metallic pipe joint, which is expensive.

  As a pipe joint that solves such a problem, a pipe joint that generates a hitting sound when a connecting pipe is normally inserted is known (see Patent Document 2). A vibration member that generates a striking sound when the connecting pipe is normally inserted is inserted into the pipe joint.

JP 2002-206681 A JP 2002-372183 A

  However, in the pipe joint shown in Patent Document 2, it is necessary to prepare a vibrating member and accommodate it inside the joint body in order to generate a striking sound. The pipe joint has an increased number of parts and is expensive. It will become something.

  The present invention has been made paying attention to such problems existing in the prior art, and its purpose is to easily confirm the connection state of the connection pipe inserted into the insertion hole of the joint body. It is possible to provide a cheap and inexpensive pipe joint.

In the first aspect of the present invention, the connecting pipe is provided in the joint body by inserting the connecting pipe provided with the water passage into the insertion hole of the joint body, so that the locking ring bites into the joint pipe and is sealed by the seal member. In the pipe joint to be connected, a joint body in which a first insertion hole into which the connection pipe is inserted is formed on the inlet side, and a second insertion hole communicating with the first insertion hole is formed on the outlet side, The in-core is attached to the water passage of the connecting pipe, and the in-core is inserted into the joint body of the connecting pipe so that the seal member comes into close contact with the outer peripheral surface of the connecting pipe, so that the water-tight state is normal . The gist is that the length is exposed to the outside from the two insertion holes.

In the second aspect of the present invention, a flange portion is formed in the inner circumferential direction between the first insertion hole and the second insertion hole of the joint body, and the in-core has an opening end of the connection pipe and a flange portion on the outer circumferential surface thereof. A stopper that abuts on the outlet is formed, and the axial length from the stopper to the outlet side end surface that is the fluid outlet is longer than the axial length of the second insertion hole . The gist of the invention is that the seal member is exposed to the outside through the second insertion hole in a state where the watertight state is normal by closely contacting the outer peripheral surface of the connection pipe .

  According to a third aspect of the present invention, the incore is slidably accommodated in both insertion holes of the joint body, and the incore is attached to the water passage of the connection pipe by inserting the connection pipe into the joint body in which the incore is accommodated. The gist is that

  According to a fourth aspect of the present invention, the locking ring is accommodated in a nut mounted on the inlet side of the joint body, and the in-core is accommodated in a state where a part thereof is exposed to the outside from the nut.

  According to a fifth aspect of the present invention, the in-core is made of an elastic material, and a large-diameter portion and a split groove extending in the axial direction from the large-diameter portion toward the stopper are formed on an end surface on the outlet side. It is mounted by contraction due to contact with the buttocks at the time of insertion from the first insertion hole to the second insertion hole.

  According to the first aspect of the present invention, when the connecting pipe is inserted into the insertion hole of the joint body and is normally connected to the joint body, the in-core attached to the water passage of the connection pipe is outside the joint body. It is possible to confirm that the connecting pipe is normally connected to the joint body both visually and by touching. Therefore, in order to confirm the connection state of the connection pipe to the pipe joint, it is not necessary to perform new processing on the joint body or to prepare a special article, and the connection state of the connection pipe can be easily achieved by an inexpensive pipe joint. Can be confirmed.

  In the invention according to claim 2, the connection state of the connecting pipe to the joint body can be easily confirmed only by changing the shape of the in-core mounted to improve the water tightness of the connecting pipe to the joint body. .

  In the invention of claim 3, since the in-core is accommodated in the joint body in advance before inserting the connection pipe into the joint body, there is a risk that the in-core is lost before the connection pipe is connected or forgetting to attach to the connection pipe. There is no.

  In invention of Claim 4, before inserting a connecting pipe in a coupling main body, it can confirm easily that the in-core is accommodated in the coupling main body.

  In the invention according to claim 5, the in-core can be attached only by being inserted into the insertion hole of the joint body, and the work can be easily performed.

(First embodiment)
Hereinafter, a first embodiment in which a pipe fitting A for a faucet fitting according to the present invention is embodied will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the pipe joint A of the present invention is formed in a metallic joint body 1 having a substantially cylindrical shape and having insertion holes 2 and 3 formed in the axial direction, and one end of the joint body 1. A nut 10 screwed to the inlet side, and an in-core 20 attached to the water passage B1 of the connecting pipe B.

  The joint body 1 has a first insertion hole 2 formed from the inlet side of one end into which the connecting pipe B is inserted, and a second end having a larger diameter than the first insertion hole 2 and connected to a faucet device or the like. An insertion hole 3 is formed, and the first insertion hole 2 and the second insertion hole 3 communicate with each other in the coaxial direction. A plurality of annular mounting grooves 4, 4 are formed adjacent to each other on the inner peripheral surface of the first insertion hole 2, and seal members 5, 5 are mounted in the mounting grooves 4, 4, respectively. Since the seal members 5 and 5 are tightly sealed against the outer peripheral surface of the connection pipe B inserted into the first insertion hole 2, the water tightness between the connection pipe B and the joint body 1 is maintained, and the connection is established. Fluid such as water or hot water passing through the water passage B1 of the pipe B is prevented from leaking from the joint body 1 to the outside. Between the first insertion hole 2 and the second insertion hole 3 of the joint body 1, a flange portion 6 that protrudes toward the inner peripheral side is formed, and a small-diameter hole 6 a is formed inside the flange portion 6. A male screw portion 7 is formed on the outer peripheral surface of the joint body 1 on the inlet side, and the nut 10 is screwed to the male screw portion 7.

  The nut 10 has a cylindrical peripheral wall portion 11, and a peripheral edge portion 12 projecting toward the inner peripheral surface is provided at one end opening thereof. A first opening 13 through which the connecting pipe B is inserted is formed inside the peripheral edge 12. A second opening 14 is formed at the other end of the nut 10, and the second opening 14 has a larger diameter than the first opening 13. A female screw portion 15 is formed on the inner peripheral surface of the second opening portion 14, and the nut 10 is attached to the joint main body 1 by screwing the female screw portion 15 to the male screw portion 7 of the joint main body 1.

  A seat 16, a locking ring 17, and a retaining member 19 are accommodated in the second opening 14 of the nut 10, and the sheet 16 and the retaining ring 17 are arranged between the peripheral edge portion 12 and the retaining member 19. 14. On the inner periphery of the locking ring 17, a number of saw-tooth teeth 18 projecting toward the inner back of the nut 10 are formed. The locking ring 17 allows the connection pipe B to be inserted into the joint body 1, but when an action is applied such that the connection pipe B inserted into the first insertion hole 2 is pulled out from the joint body 1. The serrated teeth 18 bite into the outer peripheral surface of the connecting pipe B so that the connecting pipe B is prevented from coming off from the joint body 1. The connection pipe B is formed of a soft synthetic resin material (polyethylene, polypropylene, or the like) in which the serrated teeth 18 of the locking ring 17 are easy to bite, and has a water passage B1 through which a fluid such as water or hot water passes. I have.

  An in-core 20 is attached to the water passage B1 of the connecting pipe B. The in-core 20 is made of a metal material or a synthetic resin material, and the shape thereof is a hollow, substantially cylindrical shape. The in-core 20 is attached to the water passage B1 of the connection pipe B to improve the strength of the connection pipe B made of a soft material. In order to improve the water tightness of the seal member 5 attached to the main body 1 with respect to the connection pipe B, when the connection pipe B is connected to the pipe joint A, it is attached to the water passage B1 of the connection pipe B in advance. This is used to connect the connecting pipe B to the main body 1 more reliably. Accordingly, the outer diameter of the in-core 20 is set to be the same as the inner diameter of the water passage B1 of the connecting pipe B. A stopper 21 is formed in an annular shape on the outer peripheral surface of the incore 20 so as to project in an annular shape. When the incore 20 is attached to the water passage B1 of the connecting pipe B, the stopper 21 is opened on the end face B2 of the connecting pipe B. Abut. Accordingly, a part of the in-core 20 is exposed from the connecting pipe B to the outside. The in-core 20 may be painted or marked so as to be easily visible from the outside.

  The in-core 20 is formed such that the axial length from the stopper 21 to the outlet side end face 22 is longer than the axial length of the second insertion hole 3 of the joint body 1, and the connection pipe B is normally connected to the joint body 1. In the state, the in-core 20 is set to be exposed to the outside from the second insertion hole 3 of the joint body 1. The stopper 21 of the in-core 20 has an outer diameter larger than that of the small-diameter hole 6 a formed between the first insertion hole 2 and the second insertion hole of the joint body 1, and the in-core 20 together with the connecting pipe B. Is inserted into the first insertion hole 2, the tip side passes through the small-diameter hole 6a, but the stopper 21 has a larger diameter than the small-diameter hole 6a, so that it comes into contact with the flange portion 6 and the pipe joint A of the connecting pipe B The insertion into is finished.

  The connecting pipe B is connected to the pipe joint A configured as described above as follows. As shown in FIG. 2, before connecting pipe B is connected to pipe joint A, in-core 20 is mounted in advance on the open end B2 side of water passage B1. Then, the connecting pipe B is inserted into the first insertion hole 2 of the joint body 1 together with the in-core 20. In this case, as shown in FIG. 3, the stopper 21 of the in-core 20 does not reach the flange portion 6 of the joint body 1 and the outlet side end face 22 is not exposed to the outside from the second insertion hole 3 of the joint body 1. Then, the connecting pipe B is not securely inserted into the joint body 1 to the back, and one of the pair of seal members 5 and 5 is not in close contact with the outer peripheral surface of the connecting pipe B. , 5 does not function normally with respect to the outer peripheral surface of the connecting pipe B, and water leakage may occur due to an incomplete connection state.

  When the connecting pipe B is further inserted from the state of FIG. 3 toward the back of the joint body 1, as shown in FIG. 4, the stopper 21 of the in-core 20 comes into contact with the flange portion 6 of the joint body 1, and the outlet side end face 22 is It is exposed to the outside from the second insertion hole 3 of the joint body 1. In this case, the water-tight state of the sealing members 5 and 5 with respect to the outer peripheral surface of the connecting pipe B is obtained by biting into the outer peripheral surface of the connecting pipe B of the locking ring 17 and the close contact of the pair of sealing members 5 and 5 with the outer peripheral surface of the connecting pipe B. The connection pipe B is normally connected to the joint main body 1. The operator can confirm that the connecting pipe B is normally connected to the joint body 1 by visually observing the in-core 20 that is exposed from the joint body 1. In addition, in the place where the construction site with respect to the pipe joint A of the connection pipe B is dark, the worker cannot visually check the incore 20, but the worker is exposed to the incore 20 exposed to the outside from the second insertion hole 3 of the joint body 1. It can be confirmed that the connecting pipe B is normally connected to the pipe joint A by touching with the hand.

  As described above, in the pipe joint according to the present invention, when the connecting pipe is inserted into the insertion hole of the joint body and is normally connected to the joint body, the in-core attached to the connection pipe is exposed to the outside of the joint body. Thus, it can be confirmed both visually and by touch that the connecting pipe is normally connected to the joint body. Therefore, in order to confirm the connection state of the connection pipe to the pipe joint, it is not necessary to perform new processing on the joint body or to prepare a special article, and the connection state of the connection pipe can be easily achieved by an inexpensive pipe joint. Can be confirmed.

(Second Embodiment)
Next, a second embodiment embodying the present invention will be described with reference to FIGS. In the second embodiment, the joint body accommodates the in-core in the first embodiment before the connection pipe is connected. Therefore, the same configurations as those of the first embodiment are denoted by the same numbers and the description thereof is omitted.

  As shown in FIG. 5, the in-core 20a is made of an elastic material of synthetic resin, and a large-diameter portion 23 and a plurality of split grooves 24 are formed on the outlet side end face 22a, and the split groove 24 is on the outlet side of the in-core 20a. A plurality are formed in the axial direction from the end face 22a. A spring 8 is accommodated in the first insertion hole 2 of the joint body 1 as an elastic member that biases the in-core 20a. One end of the spring 8 is locked to the flange 6.

  Therefore, when the in-core 20a is accommodated in the first insertion hole 2 of the joint body 1, the spring 8 is supported between the flange portion 6 and the stopper 21a of the in-core 20a, and the large-diameter portion 23 is contracted by the split groove 24. However, the entire inner core 20a is mounted in the first insertion hole 2 by passing through the small diameter hole 6a inside the collar portion 6 and moving to the second insertion hole 3 and then expanding the large diameter portion 23 again. . Further, the in-core 20a is formed in a length that is exposed from the first opening 13 of the nut 10 in a state where the in-core 20a is mounted on the joint body 1, and the operator can visually observe the in-core 20a. Can be surely accommodated in the joint body 1. Further, the inlet side of the in-core 20a serves as a mark indicating the insertion position when the connecting pipe B is connected to the joint body 1. Furthermore, since the in-core 20a is attached to the joint body 1 before connecting the connection pipe B, it is possible to reliably prevent water leakage caused by forgetting to insert the in-core 20a.

  A connecting pipe B is connected to the pipe joint A configured as described above as follows. As shown in FIG. 6, the pipe joint A has an in-core 20 a attached to the joint body 1, and the in-core 20 a is exposed to the outside from the nut 10. Then, as shown in FIG. 7, when the connecting pipe B is inserted into the first insertion hole 2 of the joint body 1 in the direction in which the in-core 20a is attached to the water passage B1 of the connecting pipe B, the connecting pipe B is connected to the water passage B1. It will be in the state by which the in-core 20a was mounted | worn. In this case, in the state where the stopper 21a of the in-core 20a does not reach the flange 6 of the joint body 1 and the outlet side end face 22a of the in-core 20a is not exposed to the outside from the second insertion hole 3 of the joint body 1, Since B is not inserted deeply into the joint body 1 and one of the pair of seal members 5, 5 is not in close contact with the outer peripheral surface of the connection tube B, the connection tube B of the seal members 5, 5 The watertight state on the outer peripheral surface does not function normally and water leakage may occur.

  When the connecting pipe B is further inserted from the state of FIG. 7 toward the back of the joint body 1, the stopper 21a of the in-core 20a comes into contact with the flange portion 6 of the joint body 1 as shown in FIG. The end face 22a is exposed to the outside from the second insertion hole 3 of the joint body 1. In this case, the engagement ring 17 bites into the outer peripheral surface of the connection pipe B, and the watertight state with respect to the outer peripheral surface of the connection pipe B of the seal members 5 and 5 becomes normal, and the connection pipe B is normally connected to the joint body 1. It becomes a state. Then, the operator can recognize that the connection pipe B is normally connected to the joint body 1.

  In the second embodiment described above, since the in-core is accommodated in the joint body in advance before inserting the connection pipe into the joint body, the in-core is lost before connecting the connection pipe or forgets to attach to the connection pipe. There is no fear. Moreover, it can confirm easily that the in-core is accommodated in the coupling main body. Furthermore, the in-core can be mounted simply by being inserted into the insertion hole of the joint body, and the operation can be easily performed.

It is a decomposition explanatory view of the pipe joint in a 1st embodiment of this invention. In a pipe joint, it is explanatory drawing of the state before a connecting pipe is connected to a joint main body. In a pipe joint, it is an explanatory view in the state where a connecting pipe is inserted in a joint main part, and the connection is not normal. In a pipe joint, it is explanatory drawing of the state in which the connection pipe was inserted in the joint main body, and was connected normally. It is decomposition | disassembly explanatory drawing of the pipe joint in 2nd Embodiment of this invention. In a pipe joint, it is explanatory drawing of the state before a connecting pipe is connected to a joint main body. In a pipe joint, it is an explanatory view in the state where a connecting pipe is inserted in a joint main part, and the connection is not normal. In a pipe joint, it is explanatory drawing of the state in which the connection pipe was inserted in the joint main body, and was connected normally.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Joint main body 2 1st insertion hole 3 2nd insertion hole 5 Seal member 6 Eaves part 10 Nut 17 Locking ring 20, 20a Inner core 21,21a Stopper 22,21a Outlet side end surface 23 Large diameter part 24 Split groove A Pipe joint B Connection pipe B1 Water passage B2 Open end

Claims (5)

In the pipe joint where the connection pipe is connected to the joint body by the biting of the locking ring into the connection pipe and the sealing by the seal member by inserting the connection pipe with the water passage into the insertion hole of the joint body, the inlet side Is formed with a first insertion hole into which the connection pipe is inserted, and a fitting main body formed with a second insertion hole communicating with the first insertion hole on the outlet side, and a water passage of the connection pipe. The in-core is exposed to the outside through the second insertion hole in a state in which the watertight state is normal when the sealing member is brought into close contact with the outer peripheral surface of the connecting pipe by inserting the connecting pipe into the joint body. A pipe joint characterized by being small. A flange is formed in the inner circumferential direction between the first insertion hole and the second insertion hole of the joint body, and the in-core is formed with a stopper that contacts the opening end of the connection pipe and the flange on the outer circumferential surface. the axial length to the outlet side end face is an exit of the fluid by forming longer than the axial length of the second insertion hole, the insertion into the joint body of the connecting pipe, the outer peripheral surface of the sealing member connecting pipe 2. The pipe joint according to claim 1 , wherein the in- core is exposed to the outside from the second insertion hole in a state in which the watertight state becomes normal by the close contact .   The in-core is slidably accommodated in both insertion holes of the joint body, and the in-core is attached to the water passage of the connection pipe by inserting the connection pipe into the joint body in which the in-core is accommodated. Item 3. A pipe joint according to claim 1 or 2.   4. The pipe joint according to claim 3, wherein the locking ring is accommodated in a nut mounted on the inlet side of the joint body, and the in-core is accommodated in a state in which a part thereof is exposed to the outside from the nut.   The in-core is made of an elastic material, and a large-diameter portion and a split groove extending in the axial direction from the large-diameter portion toward the stopper are formed on the end surface on the outlet side, and the large-diameter portion extends from the first insertion hole to the second insertion hole The pipe joint according to claim 3 or 4, wherein the pipe joint is mounted by contraction due to contact with the flange portion when inserted into the pipe.

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