JP2012102769A - Pipe joint device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe joint device which can connect pipes very easily.SOLUTION: The pipe joint device includes a cylindrical joint body 1, a first relay joint 2 (a first member) fitted to the joint body 1 from one end thereof, and a second relay joint (a second member) 3 fitted to the joint body 1 from the other end thereof. A first pipe 4 is connected to the first relay joint 2, and a second pipe 6 is connected to the second relay joint 3. Engaging pieces 10, 14 cut and erected on the joint body 1 are fitted to annular grooves 9, 13, so that the first relay joint 2 and the second relay joint 3 are held in a come-off prevention manner. Both the relay joints 2, 3 are connected by a single operation of insertion.

Description

  The present invention relates to a pipe joint device for connecting pipes through which fluid flows. Here, “tube” is a generic term for a substance having a function of allowing fluid to flow through the inside, and its material and mechanical properties are not limited. Therefore, it includes those having flexibility such as a charb and a hose. Yes.

  Functions of pipe fitting devices for connecting pipes differ depending on the application, and various apparatuses have been proposed depending on the application. And as one of the functions required for the pipe joint device, there is a quickness of the connection work, and Patent Document 1 is cited as a prior art pursuing the quickness of the connection work.

  In this patent document, in a configuration in which pipes are respectively inserted from both sides into a tubular pipe joint, a shape memory resin ring (engaging member) is fitted into an outward annular groove formed at the tip of both pipes. The inner circumferential surface of the pipe joint is formed with an inward annular groove that engages with the ring. After fitting, the pipe joint and the ring are heated from the outside so that the ring expands in a tapered shape and is deformed. Is pulled out by the outward annular groove of the pipe and the inward annular groove of the pipe joint, thereby preventing the pipe from coming off. In addition, in this patent document 1, the sealing agent is inject | poured from the hole vacated in the pipe joint apparatus as a sealing means.

Japanese Patent Laid-Open No. 06-221474

  In Patent Document 1, since the ring is a separate member from the pipe joint and the pipe, there is a possibility that it takes time to manage the member, and there is a possibility that poor connection occurs if the ring is not completely attached to the pipe. is there. Furthermore, although the pipe can be inserted into the pipe joint itself with a single touch, it can be said that the ring is deformed into a taper shape by heating and requires a heating process, so that the connection work itself takes considerable time.

  This invention is made | formed in view of such a present condition, and makes it a subject to provide the pipe joint apparatus which can perform a connection work more rapidly.

  The present invention has a cylindrical joint body opened at one end and the other end, a first member fitted to the joint body from one end thereof, and a second member fitted from the other end to the joint body. The basic configuration is such that the pipes are connected directly or indirectly via the first member and the second member. And in Claim 1, in the said basic structure, when the said 1st member is engage | inserted by the said joint main body, it will be elastically deformed and the 1st locking piece which will allow it to fully fit to a predetermined position And a second locking piece that is elastically deformed when the first member is fitted and allows the first member to be fully fitted to a predetermined position.

  Further, the first member is formed with a first engaging portion that allows the first locking piece to be deformed by elastic restoring force when the first member is completely fitted into the joint body. The second member is formed with a second engaging portion that allows the second locking piece to return and deform by elastic restoring force when the second member is completely fitted into the joint body. When the first locking piece engages with the first engagement portion, the first member is held so as not to be detached from the joint body, and when the second locking piece engages with the second engagement portion, The second member is held so as not to be detached from the joint body.

  According to a second aspect of the present invention, in the first aspect, the first member and the second member are respectively inserted into the joint main body. Each of the locking pieces protrudes toward the inside of the joint body, while the first engaging portion and the second engaging portion are annular grooves or annular protrusions. The invention of claim 3 is the invention according to claim 1 or 2, wherein the joint body is manufactured from a metal plate or a metal pipe, and the locking piece is formed by cutting and bending (cut bending). A plurality are arranged in a jumping state along the circumferential direction.

  In the present invention, when the first member and the second member are fully fitted into the joint body to a predetermined position, the locking piece is elastically deformed and then returned and deformed to engage with the engaging portion. Retained. Thereby, a pipe | tube can be connected directly and indirectly. Therefore, connection work can be performed very easily. And in this invention, since the latching piece was provided in the joint main body, compared with the case where the ring of another member is used like patent document 1, the number of members can be suppressed, As a result, effort of management of a member Can be suppressed. Further, since the locking piece is integrally formed with the joint body, the operation is reliable and poor connection can be prevented.

  The relationship between the size of the first member and the second member and the joint body can be selected according to the function. In general, it can be said that there are many configurations in which the first member and the second member are fitted inside the joint body as in the second aspect.

  In the present invention, since the locking piece is provided integrally with the joint body, the locking piece needs to be elastically deformed by insertion of the first member and the second member, but the metal plate as in claim 3 If manufactured with a metal pipe, there is an advantage that the locking piece can be reliably deformed using the elastic deformation of the metal plate.

  The engaging groove can be formed in an annular shape, but can also be set to a width dimension in which the locking piece fits. In this case, it is also possible to exert a function of preventing rotation of the member. It is also possible to provide a locking piece for preventing rotation in addition to the locking piece for retaining.

It is a figure which shows 1st Embodiment, (A) is a separation figure, (B) is the BB view sectional drawing of (A). It is sectional drawing of the use condition of 1st Embodiment. It is a figure which shows other embodiment.

  Next, an embodiment of the present invention will be described with reference to the drawings. First, the first embodiment shown in FIGS.

(1). Structure of First Embodiment A joint device according to the present embodiment includes a round pipe-shaped joint body 1 made of a metal plate, and a first relay serving as a first member fitted into the joint body 1 from one end. It has the joint 2 and the 2nd relay joint 3 inserted in the inside of the joint main body 1 from the other end. In the present embodiment, the second relay joint 3 corresponds to the second member recited in the claims. A first pipe 4 is connected to the first relay joint 2 via a screw-type auxiliary joint 5, and a second pipe 6 is fitted to the second relay joint 3.

  The joint body 1 has a straight shape with the same diameter over the entire length. Of course, either one or both of the one end 1a and the other end 1b may be set to have a large diameter. When one end or both ends are set to have a large diameter, they can be formed in a state where only one stage is enlarged, or can be expanded in a plurality of stages such as two stages. One end portion or the other end portion or both may be widened in a tapered shape.

  The first relay joint 2 has a fitting portion 2a that enters the inside of the joint body 1 and an exposed portion 2b that is located outside the joint body 1, and the exposed portion 2b has a larger diameter than the fitting portion 2a. In addition, the end surface of the exposed portion 2 b comes into contact with one end surface of the joint body 1. The exposed portion 2b has a hexagonal shape when viewed from the axial direction, and has an internal thread 8 that opens outward. The auxiliary joint 5 has a male screw part 5a and a hexagon head 5b, and the first pipe 4 is connected so as not to rotate or to rotate freely. The auxiliary joint 5 is connected to the first relay joint 2 by screwing. The auxiliary joint 5 can also be screwed into the first relay joint 2 from the outside.

  A portion of the fitting portion 2a of the first relay joint 2 on the tip side has a small diameter portion 2a ′. And while the 1st annular groove 9 is formed in the base end part close | similar to an exposed part among the insertion parts 2a of the 1st relay coupling 2 as an example of the 1st engagement part described in the claim, A first locking piece 10 fitted into the first annular groove 9 is cut and raised at one end 1a.

  The first locking pieces 10 are formed at equal intervals in four locations along the circumferential direction, and fall from the end of the joint body 1 toward the other end toward the axis of the joint body 1. So that it is tilted inward. Therefore, although it is allowed to insert the first relay joint 2 into the joint body 1, the first relay joint 2 cannot be removed. The first locking piece 10 is surrounded by a U-shaped punching groove 11 except for the base, but the first locking piece 10 may be formed by making a cut without forming the punching groove 11. Is possible.

  It is also possible to connect the first pipe 4 directly to the first relay joint 2. Further, a joint portion similar to the first relay joint 2 can be integrally formed on the first pipe 4. That is, the first member recited in the claims can be configured separately from the first pipe 4 or can be provided (formed) integrally. In the case where the joint body 1 is provided integrally, as a positioning means for the joint body 1, a flange portion that abuts on one end surface of the joint body 1 may be provided. Further, the number of the first locking pieces 10 can be arbitrarily set. For example, it is possible to form two or more places with an axial center, three places with equal intervals, or five or more with equal intervals.

  The second relay joint 3 also has a portion that fits inside the joint body 1 and a portion that is located outside the joint body 1, and the portion that fits inside the joint body 1 has the first relay joint 2. It has a superposed portion 3a fitted to the small diameter portion 2a 'from the outside, a flange portion 3b fitted to the intermediate step portion 1c of the joint body 1, and a small diameter portion 3c exposed to the outside of the joint body 1, The second pipe 6 is fitted and connected to the portion 3c from the outside.

  The second pipe 6 may be forcibly fitted to the small diameter portion 3b of the second relay joint 3, or may be fixed with a fixing tool such as a band. Further, it is possible to integrally form the same part as the second relay joint 3 in the second pipe 6.

  Furthermore, in the embodiment, the overlapping portion 3a of the second relay joint 3 is fitted into the small diameter portion 2a ′ of the first relay joint 2 from the outside, but it is also possible to make the relationship inward and outward (in this case, A small diameter portion is formed in the second relay joint 3, and a fitted portion is formed in the first relay joint 2. Moreover, when the sealing performance between the 1st relay coupling 2 and the 2nd relay coupling 3 is required, what is necessary is just to interpose sealing members, such as an O-ring, in the part which both fit.

  A second annular groove 13 extending over the entire circumference of the second relay joint 3 is formed at a portion fitted to the other end 1b of the joint body 1 as an example of the second engagement portion described in the claims. On the other hand, a second locking piece 14 that fits into the second annular groove 13 is formed at one end 1 b of the joint body 1.

  The second locking pieces 14 are formed at equal intervals at four locations along the circumferential direction, and face the one end from the other end of the joint body 1 and fall down on the axis of the joint body 1. So as to be inclined. Therefore, it is allowed to fit the second relay joint 3 into the joint body 1, but the second relay joint 3 cannot be removed. The second locking piece 14 is surrounded by a U-shaped punching groove 15 except for the base, but the second locking piece 14 may be formed by making a cut without forming the punching groove 15. Is possible.

  In the embodiment, a second annular groove 13 is formed in the second relay joint 3, but a holding ring body that fits from the inside to the other end 1 b of the joint body 1 and fits from the outside to the second relay joint 3 is used. In addition, it is possible to hold and hold the second relay joint 3 with this holding ring body, and to form the second annular groove 13 in the holding ring body (in this case, the other end 1b of the fitting body 1 is made large). It is also possible to form in the diameter part and fit the pressing ring body into this large diameter part.)

(2). Summary of First Embodiment As described above, when the fitting portion 2a of the first relay joint 2 is inserted into the joint body 1, the first locking piece 10 is pushed by the fitting portion 2a of the first relay joint 2. Then, it is elastically deformed to occur once, and then when the fitting portion 2a of the first relay joint 2 is fully inserted into the joint body 1 and the end surface of the exposed portion 2b comes into contact with one end surface of the joint body 1, The one locking piece 10 returns to a posture inclined inward at the location of the first annular groove 9 and is deformed. Thereby, the 1st relay coupling 2 is hold | maintained so that removal is impossible. The first pipe 4 may be connected to the first relay joint 2 in advance, or the first relay joint 2 is connected to the joint body 1 first, and then the first pipe 4 is connected to the first relay joint 2. May be.

  When the second relay joint 3 is inserted into the joint body 1 from one end thereof, the second locking piece 14 is deformed so as to be pushed once by the tip surface of the second relay joint 3 and the second relay joint 3 is inserted. If it cuts out completely, the 2nd locking piece 14 will return and deform | transform at the location of the 2nd annular groove 13, and, thereby, the 2nd relay coupling 3 is hold | maintained with respect to the coupling main body 1 so that it cannot detach. The second pipe 6 may be connected to the second relay joint 3 in advance, or the second relay joint 3 is connected to the joint body 1 first, and then the second pipe 6 is connected to the second relay joint 3. It is also possible. The second pipe 6 can be inserted into the second relay joint 3.

(3). Other Embodiments Next, another embodiment shown in FIG. 3 will be described. In 2nd Embodiment shown to (A), the coupling main body 1 is set to the same diameter over the full length, and raises and forms both the locking pieces 10 and 14 outward. Accordingly, inward annular grooves 19 and 20 are formed as engaging portions on the inner circumferences of the first member 17 and the second member 18, respectively. It is also possible to mount an O-ring as a sealing means on the inner periphery of both the members 17 and 18.

  In the third embodiment shown in (B), the first locking piece 10 is formed inward and the second locking piece 14 is formed outward (the reverse relationship may be used). Although not shown in the drawing, it is also possible to form an inwardly engaging piece and an outwardly engaging piece at different positions in the circumferential direction at one end or both ends or both of the joint body 1. (In this case, a double cylinder can be inserted and connected to the joint body 1 from the same direction).

  In 4th Embodiment shown to (C), the coupling main body 1 is formed in L shape (elbow shape). In this embodiment, both end portions 1a and 1b of the joint body 1 have a large diameter, and a pressing ring 21 is fitted into the large diameter portion. The first pipe 4 and the second pipe (not shown) have the same structure, and a snap ring 22 is attached to an annular groove formed near the tip of the first pipe 4 and the large diameter portion 1a, It is pressed and held on the wall surface 1b. An O-ring 23 is attached to a portion of the pipe 4 on the tip side of the snap ring 22.

(4). Others The present invention can be embodied in various ways other than the above embodiment. For example, the shape of the joint body can be arbitrarily designed as necessary. The joint body can be made of resin. The shapes of the first member and the second member attached to the joint body can be arbitrarily set. As the engaging portion, an annular protrusion (a flange, a rib, or a bulging portion) can be formed instead of the annular groove.

  The joint body of the present invention can be manufactured using a cylindrical metal tube (stainless steel tube, steel tube, aluminum tube, copper tube, etc.), or manufactured by drawing a metal plate such as a stainless steel plate or steel plate. It is also possible to do. When a metal plate is used as a material, there is an advantage that it can be easily manufactured by transfer processing using a press device.

  As described in the effect of the invention, it is possible to provide a locking piece for rotation prevention, but it is also possible to provide only a locking piece dedicated to rotation prevention, apart from the claims.

  The present invention is embodied in a pipe joint device and exhibits utility. Therefore, it can be used industrially.

DESCRIPTION OF SYMBOLS 1 Joint main body 2 1st relay joint as an example of 1st member 3 2nd relay joint as an example of 2nd member 4 1st pipe 5 Auxiliary joint 6 2nd pipe 9 1st as an example of 1st engaging part Annular groove 10 First locking piece 11, 15 Extraction groove 13 Second annular groove 14 as an example of first engaging portion 14 Second locking piece

Claims (3)

A cylindrical joint body opened at one end and the other end, a first member fitted to the joint body from one end thereof, and a second member fitted from the other end to the joint body; It is the structure which connects a pipe directly or indirectly via the 1st member and the 2nd member,
A first locking piece that elastically deforms when the first member is fitted into the joint body and allows the first member to be fully fitted to a predetermined position, and elastically deformed when the first member is fitted. The second locking piece that allows the first member to be fully fitted to a predetermined position is integrally formed,
The first member is formed with a first engaging portion that allows the first locking piece to be deformed by elastic restoring force when the first member is completely fitted into the joint body. The member is formed with a second engaging portion that allows the second locking piece to return and deform by elastic restoring force when the second member is completely fitted into the joint body.
When the first locking piece engages with the first engaging portion, the first member is held so as not to be detached from the joint body, and the second locking piece engages with the second engaging portion. And the second member is held so as not to be detached from the joint body.
Pipe fitting device. The first member and the second member are respectively inserted into the joint main body. For this reason, the first locking piece and the second locking piece are respectively directed toward the inside of the joint main body. While the first engaging portion and the second engaging portion are annular grooves or annular protrusions,
The pipe joint device according to claim 1. The joint body is manufactured using a metal plate or a metal pipe as a raw material, the locking piece is formed by cutting and raising, and a plurality of the pieces are arranged in a jumping state along the circumferential direction.
The pipe joint device according to claim 1 or 2.

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