JP2017190805A - Pipe joint assembly and rotation stopper for pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a structure of a rotation stopper for prohibiting relative rotation of a main body and a nut in a pipe joint, and to facilitate a mounting work of the rotation stopper to the pipe joint.SOLUTION: A pipe joint 10 has a main body 11 and a rotatable nut 12. A rotation stopper 20 is removably mounted over one end portion of the main body 11 and the nut 12, and prohibits relative rotation of the main body 11 and the nut 12. A hexagonal portion 11b is formed on one end portion of the main body 11. The rotation stopper 20 has the C-shape, and has a pair of holding portions 21. Each holding portion 21 has first and second contact faces 25, 26 adjacent in a width direction. In a state that the rotation stopper 20 is mounted on the pipe joint 10, the pair of first contact faces 25 are kept into contact with a pair of locking faces 12x of the nut 12, and the pair of second contact faces 26 are kept into contact with a pair of receiving faces 11x of the hexagonal portion 11b of the main body 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pipe joint assembly and a rotation stopper that can inhibit relative rotation between a pipe joint main body and a nut rotatably connected to one end of the pipe joint main body, if necessary.

A pipe joint with a rotatable nut is used, for example, when connecting a gas pipe to a gas apparatus. According to this pipe joint, it is possible to connect only to the hose end of the gas equipment by turning only the nut without turning the pipe joint body, so that the connection work can be simplified.
Since the pipe joint main body can rotate with respect to the gas equipment in the connected state of the pipe joint, it may be required to inhibit the pipe joint main body from rotating as will be described later.

  Patent Document 1 discloses an L-shaped main body, a pipe joint having a nut rotatably connected to one end of the main body, and a rotation stopper. This rotation stopper is made of sheet metal, and has a first mounting portion having a shape that matches the polygonal shape of the nut, and a second mounting portion in which an insertion recess is formed. The first attachment portion is attached to the nut in a non-rotatable manner, and the second attachment portion is attached to the other end portion of the main body away from the nut through the insertion recess, whereby relative rotation between the nut and the main body is prohibited.

JP 2006-70452 A

  In the rotation stopper of Patent Document 1, since the first mounting portion and the second mounting portion are separated from each other, the structure is complicated and the mounting to the pipe joint is complicated.

  The present invention has been made to solve the above problems, and a pipe joint assembly includes a main body and a pipe joint having a nut rotatably connected to one end of the main body, and the one end of the main body. A rotation stopper that is detachably mounted on the outer periphery of the nut across the nut and prohibits relative rotation of the main body and the nut; and at least one pair of flat receiving surfaces on the outer periphery of the one end of the main body The rotation stopper is formed between a pair of holding portions that are spaced apart from each other, a connecting portion that connects these holding portions, and a pair of the holding portions for inserting the pipe joint in the radial direction. A flat first and second contact surfaces are formed adjacent to each other in the width direction, and the first contact surfaces of the pair of sandwiching portions are opposed to each other. The second contact surfaces are opposed to each other, and the rotation stopper Are attached to the pipe joint, the pair of first contact surfaces are in contact with the pair of latching surfaces of the nut, and the pair of second contact surfaces are the pair of receiving surfaces of the main body. It is characterized by abutting on.

  According to the above configuration, in order to prevent relative rotation between the main body of the pipe joint and the nut, the main body and the nut of the pipe joint are inserted into the gap between the rotation stoppers, and the first and second contact surfaces of each clamping portion are formed. It is only necessary to contact the retaining surface of the nut and the receiving surface of the main body, respectively, and the attachment of the rotation stopper to the pipe joint can be facilitated. Further, since the first and second contact surfaces are formed adjacent to each other between the pair of sandwiching portions facing each other, the structure of the rotation stopper can be simplified.

  Preferably, in the pipe joint, the pair of latching surfaces are parallel to each other, and the pair of receiving surfaces are parallel to each other. In the rotation stopper, the pair of first contact surfaces are In addition to being parallel, the pair of second contact surfaces are parallel to each other.

Preferably, a polygonal portion having a shape corresponding to the polygonal shape of the nut is formed on the outer periphery of the one end portion of the main body of the pipe joint, and the polygonal portion has a plurality of pairs of the receiving surfaces.
According to the above configuration, in order to attach the rotation stopper to the pipe joint, the hooking surface of the nut that contacts the first contact surface and the receiving surface of the main body that contacts the second contact surface are aligned. At this time, the amount of relative rotation between the main body and the nut can be reduced.

Preferably, in the pipe joint, an annular fitting groove is formed between the end of the main body and the nut, and the inner periphery of the rotation stopper has at least the pair of clamping parts. A fitting projection is formed between the first abutting surface and the second abutting surface, and the fitting projection is fitted into the fitting groove when the rotation stopper is attached to the pipe joint. It is.
According to the said structure, when the fitting protrusion of a rotation stopper is engage | inserted by a fitting groove, a rotation stopper is positioned in an axial direction with respect to a pipe joint, and it prevents that it shift | deviates to the same direction.

Preferably, the rotation stopper can be elastically deformed so that the pair of holding portions are moved closer to and away from each other, and the fitting protrusion is connected to the linkage from the one holding portion on the inner periphery of the rotation stopper. Provided as a pair of locking parts that extend in the circumferential direction continuously beyond the angle range of 180 ° through the part to the other clamping part and whose both end parts are locked to the bottom surface of the fitting groove Has been.
According to the above configuration, the engaging portions at both ends of the fitting protrusion are fitted into the fitting groove so as to be hooked on the bottom surface of the fitting groove, so that the rotation stopper is prevented from coming off from the pipe joint. . Moreover, since it is reinforced by the fitting protrusions extending in the circumferential direction, the diameter of the rotation stopper is suppressed, and the rotation stopper can be more reliably prevented from falling off the pipe joint.

  Another aspect of the present invention is a rotation stopper used for prohibiting relative rotation between a main body of a pipe joint and a nut rotatably connected to one end of the main body. A connecting portion that connects the pair of sandwiching portions, and a gap formed between the pair of sandwiching portions for inserting the pipe joint in a radial direction thereof, and adjacent to each sandwiching portion in the width direction. Thus, flat first and second contact surfaces are formed, the first contact surfaces of the pair of clamping portions are opposed to each other, and the second contact surfaces are opposed to each other. The pair of first contact surfaces are in contact with the pair of latching surfaces of the nut, and the pair of second contact surfaces are formed at the one end of the main body. It is characterized by abutting on.

  Preferably, the pair of first contact surfaces are parallel to each other, and the pair of second contact surfaces are parallel to each other.

  Preferably, the rotation stopper is elastically deformable so that the pair of sandwiching portions approach and separate from each other, and the inner periphery of the rotation stopper has the first contact surface and the second contact surface. The fitting projections that pass between the two clamping parts are continuously formed in the circumferential direction beyond the angular range of 180 ° from the one clamping part to the other clamping part through the connecting part. Both ends of the projections are provided as a pair of locking portions, and when the rotation stopper is mounted on the pipe joint, the fitting projections are fitted into the fitting grooves, and the pair of locking portions are fitted to the fittings. Locked to the bottom of the groove.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to attach a rotation stopper for prohibiting the relative rotation of a pipe joint main body and a nut to a pipe joint easily, the structure of a rotation stopper can be simplified.

It is a side view which shows the pipe joint assembly which concerns on 1st Embodiment of this invention in the state which isolate | separated the pipe joint and the rotation stopper. It is a side view which shows the same pipe joint assembly. It is a front view which shows the same pipe joint assembly. It is a bottom view which shows the same pipe joint assembly. FIG. 4 is a cross-sectional view taken along the arrow V in FIG. 3. FIG. 6 is a cross-sectional view taken along arrow VI in FIG. 5. FIG. 7A is a front view thereof, FIG. 7B is a bottom view, and FIG. 7C is a cross-sectional view taken along arrow C in FIG. 7A. In the embodiment, it is a figure which shows the process of installing the gas apparatus of the state which connected the gas cord through the pipe joint with which the rotation stopper was mounted | worn in a kitchen cabinet. It is a figure which shows the state which connected the gas apparatus installed in the kitchen cabinet to gas piping through the gas cord. It is a comparative example, Comprising: It is a figure which shows the process of installing the gas apparatus of the state which connected the gas cord through the pipe joint which does not mount | wear with a rotation stopper.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. In this embodiment, the present invention is applied to a gas pipe joint used when connecting a gas pipe and a gas device. Of course, the present invention is not limited to gas pipe joints.

  The pipe joint assembly A of this embodiment is provided with the pipe joint 10 and the rotation stopper 20 as shown in FIGS. The pipe joint 10 has a main body 11 and a nut 12 rotatably connected to the main body 11.

  The nut 12 integrally has a tool hooking portion 12a and a fitting convex portion 12b (shown only in FIG. 5) having a smaller diameter adjacent to each other in the axial direction for hooking a tool such as a spanner. The tool hook 12a has a hexagonal shape (polygonal shape) and has three pairs of flat hooking surfaces 12x that are parallel to each other.

  The main body 11 is formed in a substantially L shape, and the axes of the inlet side end and the outlet side end are orthogonal to each other. The end portion on the inlet side of the main body 11 is a plug portion 11a. As shown in FIG. 5, the fitting convex portion 12 b of the nut 12 is rotatably fitted to the outlet side end portion of the main body 11. Note that a C-ring 13 is fitted in an annular groove formed in the inner periphery of the outlet side end of the main body 11 and the outer periphery of the fitting convex portion 12b, and the axial movement of the nut 12 with respect to the main body 11 is prohibited. Yes.

  A hexagonal portion 11 b (polygonal portion) corresponding to the hexagonal shape of the tool hooking portion 12 a of the nut 12 is formed at the outlet side end portion of the main body 11. The hexagonal portion 11b has three pairs of flat receiving surfaces 11x that are parallel to each other.

  The pipe joint 10 has an annular fitting groove 15 between the outlet side end portion of the main body 11 and the tool hooking portion 12 a of the nut 12. The fitting groove 15 separates the receiving surface 11 x of the main body 11 and the latching surface 12 x of the nut 12.

  As shown in FIGS. 1 to 6, the rotation stopper 20 is detachably mounted across the outlet-side end portion of the main body 11 of the pipe joint 10 and the nut 12, so that the relative rotation between the main body 11 and the nut 12 can be performed. It is forbidden.

  As shown in FIG. 7A, the rotation stopper 20 has a C shape or a U shape, and is made of resin. The rotation stopper 20 has a pair of holding parts 21 and 21 that are spaced apart from each other, a connecting part 22 that connects the holding parts 21 and 21, and a gap 23 that is formed between the pair of holding parts 21 and 21. ing.

  As shown in FIGS. 7B and 7C, each clamping portion 21 has a flat first adjacent to the width direction (the axial direction of the rotation stopper 20, the left-right direction in FIG. 7C). , Second contact surfaces 25 and 26 are formed. As shown in FIG. 7B, in the pair of sandwiching portions 21, 21, the first contact surfaces 25, 25 are opposed to each other in parallel, and the second contact surfaces 26, 26 are parallel to each other. Facing each other.

  A fitting projection 27 is formed on the inner periphery of the rotation stopper 20 so as to continuously extend in the circumferential direction from one clamping part 21 through the connecting part 22 to the other clamping part 21. In each clamping part 21, the fitting protrusion 27 is located between the first contact surface 25 and the second contact surface 26.

  The fitting projection 27 is formed beyond the angle range of 180 ° on the inner periphery of the rotation stopper 20, and both end portions of the fitting projection 27 are locking portions 27a and 27a. As shown in FIG. 6, the separation distance L between the opposing locking portions 27 a and 27 a is smaller than the diameter D of the bottom surface 15 a of the fitting groove 15 in the nut 12, and the rotation stopper 20 is attached to the pipe joint 10. At this time, the locking portions 27 a and 27 a are locked to the bottom surface 15 a of the fitting groove 15.

Next, assembly of the pipe joint assembly A of this embodiment will be described with reference to FIGS.
First, as shown in FIG. 1, the nut 12 or the nut 12 or the receiving surface 11 x of the hexagonal portion 11 b of the body 11 of the pipe joint 10 and the latching surface 12 x of the nut 12 of the pipe joint 10 are flush with each other. The main body 11 is rotated. In this alignment, the relative rotation amount between the main body 11 and the nut 12 is less than 60 ° and can be small.

  Next, the rotation stopper 20 is brought close to the pipe joint 10 from the radial direction of the outlet side end portion of the pipe joint 10, and the pipe joint 10 is inserted into the gap 23 of the rotation stopper 20. At this time, the first and second contact surfaces 25, 26 of the clamping part 21 are made parallel to the hooking surface 12 x of the nut 12 and the receiving surface 11 x of the main body 11.

  The fitting protrusion 27 is fitted into the fitting groove 15 when the rotation stopper 20 is mounted. As shown in FIG. 6, since the distance L between the locking portions 27a and 27a is smaller than the diameter D of the bottom surface 15a of the fitting groove 15, the pair of locking portions 27a abut against the bottom surface 15a of the fitting groove 1b. When the rotation stopper 20 is pushed in, the rotation stopper 20 is elastically deformed, and the pair of locking portions 27a and 27a once move away from each other and then return to the original separation distance. In this way, as shown in FIGS. 4 and 6, the locking portion 27a is locked to the bottom surface 15a of the fitting groove 15, and the mounting of the rotation stopper 20 to the pipe joint 10 is completed. This mounting operation is simple because it only pushes the rotation stopper 20 toward the pipe joint 10.

  As shown in FIG. 4, in a state where the rotation stopper 20 is mounted on the pipe joint 10, the pair of first contact surfaces 25, 25 contacts the pair of latching surfaces 12 x, 12 x of the nut 12, and Since the second contact surfaces 26 and 26 contact the pair of receiving surfaces 11x and 11x of the main body 11, relative rotation of the main body 11 and the nut 12 is prohibited.

  When the fitting protrusion 27 of the rotation stopper 20 is fitted in the fitting groove 15, the rotation stopper 20 is positioned in the adjacent direction of the main body 11 and the nut 12 with respect to the pipe joint 10 and is shifted in the same direction. Is prevented.

  The fitting protrusion 27 extends continuously in the circumferential direction and reinforces the rotation stopper 20. Therefore, the clamping force of the pipe joint 10 by the clamping part 21 is strengthened. Further, the distance between the sandwiching portions 21 and 21 is difficult to increase, and the engagement state of the pair of engagement portions 27a of the engagement protrusions 27 to the bottom surface 15a of the engagement groove 15 can be favorably maintained. Falling off from the pipe joint 10 is prevented.

  The said pipe joint assembly A is used when installing the built-in gas stove 1 (gas apparatus) in the kitchen cabinet 2, as shown, for example in FIG. 8, FIG. In the cabinet 2, a gas pipe 3 extends vertically along the back plate 2a, and a gas stopper 4 is attached to the upper end thereof. The gas stopper 4 has a plug portion 4a.

  Before installing the gas stove 1, the nut 12 of the pipe joint 10 is turned and screwed into the hose end 1 a of the gas stove 1. When the pipe joint 10 is connected to the gas stove 1, the main body 11 of the pipe joint 10 is rotatable. With the plug portion 11a of the main body 11 substantially horizontal and directed toward the front side of the sheet of FIG. 8, the rotation stopper 20 is attached to the pipe joint 10 as described above to inhibit the main body 11 from rotating.

  Next, the socket 5 a of the gas cord 5 is connected to the plug portion 11 a of the pipe joint 10. Prior to installation of the gas stove 1 in the cabinet 2, the gas cord 5 is connected to the gas stove 1 for the following reason. This is because when the gas cord 5 is connected to the pipe joint 10 after the gas stove 1 is installed, the operator must connect the gas cord while looking up in the cabinet 2, and the work becomes complicated. The connecting operation of the gas cord 5 may be performed prior to the mounting operation of the rotation stopper 20.

  Next, as shown in FIG. 8, the gas stove 1 is lifted and installed in the upper opening of the cabinet 2. Specifically, in a state in which the rear portion of the gas stove 1 is raised, the engagement recess 1b formed in the upper part of the front surface of the gas stove 1 is engaged with the engagement portion 2c at the upper end of the front plate 2b of the cabinet 2. Then, the rear part of the gas stove 1 is lowered with this engagement point as the center and placed on the upper end of the back plate 2a of the cabinet 2.

  In the above installation work, the socket 5a connected to the plug portion 11a of the pipe joint 10 is maintained substantially horizontal by the rotation stopper 20, and the gas cord 5 hanging from the socket 5a is substantially parallel to the back plate 2a of the cabinet 2. Therefore, it is possible to avoid the inconvenience that the socket 5a and the gas cord 5 are caught on the back plate 2a of the cabinet 2 during the installation work.

  After the operation of installing the gas stove 1 in the cabinet is completed, the socket 5b provided at the other end of the gas cord 5 is connected to the plug 4a of the gas plug 4. Thereby, the connection work to the gas piping 3 of the gas stove 1 is completed.

A comparative example in which the gas stove 1 is installed without using the rotation stopper 20 will be described with reference to FIG.
Since the main body 11 of the pipe joint 10 is rotatable, the plug portion 11 a (not shown) faces downward due to the weight of the gas cord 5. In the middle of the installation process, the gas stove 1 is inclined with the rear portion raised, so that the plug portion 11a protrudes rearward. As a result, the socket 5a and the gas cord 5 connected to the plug portion 11a protrude to the rear of the cabinet 1. The operator needs to be careful not to catch the socket 5a and the gas cord 5 on the back plate 2a of the cabinet 2, and the installation work becomes complicated.

In addition, this invention is not limited to the said embodiment and Example, A various modified example is employable in the range which does not deviate from the summary.
In the above embodiment, the respective latching surfaces of the nut and the receiving surfaces of the hexagonal portions (polygonal portions) of the main body adjacent thereto are aligned so that the adjacent latching surfaces and the receiving surfaces are flush with each other. A step may be provided between the hooking surface and the receiving surface. In this case, a step is provided between the first and second contact portions of the rotation stopper in correspondence with the hooking surface and the receiving surface.
It is sufficient that at least a pair of receiving surfaces on the outer periphery of the end of the main body is formed.
The shape of the nut and the polygonal part is not limited to a hexagonal shape, and may be any other polygonal shape as long as it has a plurality of pairs of flat surfaces parallel to each other.

  The present invention can be applied to a pipe joint with a rotatable nut.

A Pipe fitting assembly 10 Pipe fitting 11 Body 11b Hexagonal part (polygonal part)
11x receiving surface 12 nut 12x latching surface 15 fitting groove 15a bottom surface 20 rotation stopper 21 clamping portion 22 connecting portion 23 gap 25 first contact surface 26 second contact surface 27 fitting protrusion 27a locking portion

Claims (8)

A pipe joint having a main body and a nut rotatably connected to one end of the main body;
A rotation stopper that is detachably mounted on the outer periphery of the one end of the main body and the nut, and prohibits relative rotation of the main body and the nut, and
At least one pair of flat receiving surfaces is formed on the outer periphery of the one end of the main body,
The rotation stopper includes a pair of holding portions that are spaced apart from each other, a connecting portion that connects the holding portions, and a gap that is formed between the pair of holding portions so that the pipe joint is inserted in the radial direction. Each sandwiching portion is formed with flat first and second contact surfaces adjacent to each other in the width direction, the first contact surfaces of the pair of sandwiching portions face each other, and the second contact surfaces The faces are facing each other,
In a state where the rotation stopper is attached to the pipe joint, the pair of first contact surfaces abuts on the pair of latching surfaces of the nut, and the pair of second contact surfaces are in the main body. A pipe joint assembly, wherein the pipe joint assembly abuts against a pair of receiving surfaces. In the pipe joint, the pair of hooking surfaces are parallel to each other, and the pair of receiving surfaces are parallel to each other,
The pipe joint assembly according to claim 1, wherein in the rotation stopper, the pair of first contact surfaces are parallel to each other, and the pair of second contact surfaces are parallel to each other. .   The polygonal part of the shape corresponding to the polygonal shape of the said nut is formed in the outer periphery of the edge part of the said main body of the said pipe joint, This polygonal part has two or more pairs of the said receiving surfaces, or characterized by the above-mentioned. 2. The pipe joint assembly according to 2. In the pipe joint, an annular fitting groove is formed between the one end of the main body and the nut,
On the inner periphery of the rotation stopper, a fitting projection is formed at least between the first contact surface and the second contact surface of the pair of holding portions,
The pipe joint assembly according to any one of claims 1 to 3, wherein the fitting protrusion is fitted into the fitting groove when the rotation stopper is attached to the pipe joint. The rotation stopper is elastically deformable so that the pair of sandwiching portions approach and separate from each other,
The fitting protrusion continuously extends in the circumferential direction over an angular range of 180 ° from the one clamping part to the other clamping part on the inner circumference of the rotation stopper. The pipe joint assembly according to claim 4, wherein both end portions are provided as a pair of locking portions locked to the bottom surface of the fitting groove. In a rotation stopper used to prohibit relative rotation between a main body of a pipe joint and a nut rotatably connected to one end of the main body,
A pair of holding portions that are spaced apart from each other, a connecting portion that connects the pair of holding portions, and a gap formed between the pair of holding portions in order to allow the pipe joint to be inserted in the radial direction,
Each sandwiching portion is formed with flat first and second contact surfaces adjacent to each other in the width direction, the first contact surfaces of the pair of sandwiching portions are opposed to each other, and the second contact surfaces are Facing each other
In the mounted state on the pipe joint, the pair of first contact surfaces are in contact with the pair of latching surfaces of the nut, and the pair of second contact surfaces are formed at the one end of the main body. A rotation stopper for a pipe joint, which abuts against a pair of receiving surfaces.   The rotation stopper for a pipe joint according to claim 6, wherein the pair of first contact surfaces are parallel to each other, and the pair of second contact surfaces are parallel to each other. The rotation stopper can be elastically deformed so that the pair of sandwiching portions approach and separate from each other, and an inner periphery of the rotation stopper is between the first contact surface and the second contact surface. The fitting protrusions that pass through are formed continuously in the circumferential direction beyond the angle range of 180 ° from the one clamping part to the other clamping part through the connecting part, and both ends of the fitting protrusion Part is provided as a pair of locking parts,
In the mounting state of the rotation stopper to the pipe joint, the fitting protrusion is fitted into the fitting groove, and the pair of locking portions are locked to the bottom surface of the fitting groove. The rotation stopper for pipe joints according to claim 6 or 7.

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