JP2019113081A - Joint - Google Patents

Abstract

To suppress a possibility for a pipe to be broken caused by close-contact bending.SOLUTION: A joint 12 includes a cylindrical joint body 40. The joint 12 is provided with a pipe protector 42 in addition to the joint body 40. The pipe protector 42 has a cylindrical part 100 and a body fixing part 102. The cylindrical part 100 forms a space communicating with a space formed by the joint body 40. The cylindrical part 100 is more likely to be deformed than the joint body 40. The body fixing part 102 fixes the cylindrical part 100 to the joint body 40. The cylindrical part 100 has a plurality of space forming parts 120 and mutual connection parts 122. The plurality of space forming parts 120 are annular. The plurality of space forming parts 120 form spaces inside. The plurality of space forming parts 120 are arranged in the way that they form columns. The mutual connection parts 122 are arranged between each pair of adjacent space forming parts 120. The mutual connection parts 122 mutually connect the pairs of space forming parts 120. The mutual connection parts 122 are more likely to be deformed than the pairs of the space forming parts 120.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a joint.

  DESCRIPTION OF RELATED ART Conventionally, the pipe | tube connection structure which connected the coupling | joint containing a nipple and a flexible pipe | tube is known (for example, refer patent document 1). In the pipe connection structure of this type, the joint has a cylindrical receiving portion. The flexible tube has a cylindrical housing end at one end in the longitudinal direction and a cylindrical exposed portion at the other end in the longitudinal direction.

  The receiving end is received in the socket for connection with the coupling. The exposed portion is disposed coaxially with the receiving end outside the receptacle. And a pipe | tube connection structure is comprised so that the connection state of a coupling | joint and a flexible pipe | tube can be hold | maintained.

JP 2012-132543 A

  The joint disclosed in Patent Document 1 has a problem that when bending is performed in the case of a flexible pipe, there is a high possibility that a part of the flexible pipe may be broken. The term "bending" means bending of the flexible pipe near the connection point between the flexible pipe and the joint. If such a failure occurs, the fluid flowing through the flexible pipe may leak. Such problems are true not only for flexible pipes but also for pipes connected to fittings.

  The present invention has been made to solve this problem. It is an object of the present invention to provide a joint which reduces the possibility of tube breakage due to bending.

  The joint of the present invention will be described with reference to the drawings. The use of reference numerals in the drawings in this section is intended to aid the understanding of the contents of the invention, and is not intended to limit the contents to the illustrated range.

  In order to achieve the above-mentioned purpose, according to one aspect of the present invention, the joint 12 comprises a tubular joint body 40. The joint 12 is provided with a pipe protector 42 in addition to the joint body 40. The tube protector 42 has a cylindrical portion 100 and a main body fixing portion 102. The cylindrical portion 100 forms a space communicating with the space formed by the joint body 40. The cylindrical portion 100 is more easily deformed than the joint main body 40. The main body fixing portion 102 fixes the tubular portion 100 to the joint main body 40. The tubular portion 100 has a plurality of space forming portions 120 and an interconnecting portion 122. The plurality of space forming portions 120 form a space inside. The plurality of space forming portions 120 are arranged to form a row. The interconnects 122 are disposed between a pair of adjacent space formations 120. The interconnects 122 interconnect the pairs of space formations 120. The interconnects 122 are more susceptible to deformation than the pair of space forming portions 120.

  The main body fixing portion 102 fixes the tubular portion 100 to the joint main body 40. The cylindrical portion 100 forms a space communicating with the space formed by the joint main body 40. Since such a space is formed, the tip portion of the pipe 14 connected to the joint 12 according to the present invention enters the joint body 40 via the cylindrical portion 100 of the pipe protector 42. The cylindrical portion 100 is more easily deformed than the joint main body 40. Since the outer periphery of the pipe 14 is surrounded by a substance that is more easily elastically deformed than the joint main body 40, the pipe 14 has its curvature radius even if bending is performed at the end of the joint main body 40 as compared with the case where the tubular portion 100 is not passed. Is less likely to become smaller. The tubular part 100 has a plurality of space forming parts 120 and an interconnection part 122, and the interconnection parts 122 mutually connect the pair of space forming parts 120, and more than the pair of space forming parts 120. The interconnects 122 are susceptible to deformation. As a result, the curvature radius of the tube can be reduced even if bending is performed at the end of the tube portion 100 compared to when the ease of deformation of the tube portion 100 is uniform from one end to the other end Sex is low. As the radius of curvature is less likely to decrease, the potential for breakage of the tube 14 is also less. As a result, the possibility of tube breakage due to bending can be reduced.

  Alternatively, it is desirable that the shape of the plurality of space forming portions 120 described above be annular. In this case, it is desirable that the shape of the interconnection portion 122 be an annular shape having an outer diameter smaller than that of the pair of space forming portions 120.

  If the shape of the interconnection portion 122 is an annular shape having an outer diameter smaller than both of the pair of space forming portions 120, a groove is formed on the outer periphery of the cylindrical portion 100 by the pair of space forming portions 120 and the interconnection portion 122 It will be done. When the groove is formed, the cylindrical portion 100 is more easily bent than when the groove is not formed. When the tubular portion 100 is easily flexed, bending at the end of the tubular portion 100 is carried out at the end of the tubular portion 100, so that the possibility of reducing the radius of curvature of the tube 14 is reduced. As the radius of curvature is less likely to decrease, the potential for breakage of the tube 14 is also less. As a result, the possibility of breakage of the tube 14 due to bending can be suppressed.

  Alternatively, it is desirable that the difference between the outer diameter and the inner diameter of the plurality of space forming portions 120 described above be smaller as the space forming portion 120 is disposed at a position farther from the main body fixing portion 102. In this case, it is desirable that the inner diameters of the plurality of space forming portions 120 be the same. In this case, it is desirable that the inner diameter of the interconnection portion 122 be the same as the inner diameter of the plurality of space forming portions 120.

  When all the three requirements described below are satisfied, the portion of the cylindrical portion 100 which is far from the main body fixing portion 102 is more easily bent than the near portion. The first requirement is that the difference between the outer diameter and the inner diameter of the plurality of space forming portions 120 is smaller as the space forming portion 120 is disposed at a position farther from the main body fixing portion 102. The second requirement is that the inner diameters of the plurality of space forming portions 120 are the same. The third requirement is that the inner diameter of the interconnect 122 is the same as the inner diameter of the plurality of space forming portions 120. When bending is performed at the end of the cylindrical portion 100 when the bending is performed at the end of the cylindrical portion 100 as compared to the case where the cylindrical portion 100 is more easily bent as compared with the portion where the portion far from the main body fixing portion 102 is near. It is less likely that the radius of curvature of 14 becomes smaller. As the radius of curvature is less likely to decrease, the potential for breakage of the tube 14 is also less. As a result, the possibility of breakage of the tube 14 due to bending can be suppressed.

  It is also desirable that the interconnects 122 described above be integral with both of the pair of space formations 120.

  When the interconnects 122 are integral with both of the pair of space forming portions 120, compared to when the interconnecting portions 122 are separate from at least one of the pair of space forming portions 120, The other is more likely to support the force on one. When the possibility becomes high, the maximum force exerted on each space forming portion 120 can be suppressed as compared with the case where it is not so. If the maximum force applied to the individual space forming portions 120 can be suppressed, the possibility that the radius of curvature of the tube 14 in the cylindrical portion 100 becomes small is reduced even if bending is performed, as compared with the case where it is not so. . As the radius of curvature is less likely to decrease, the potential for breakage of the tube 14 is also less. As a result, the possibility of breakage of the tube 14 due to bending can be suppressed.

  In addition, it is desirable that the above-described tube protector 42 further includes an end contact portion 104. The end contact portion 104 is fixed to the cylindrical portion 100 so as to be disposed closer to the joint main body 40 than the cylindrical portion 100. When the main body fixing portion 102 fixes the tubular portion 100 to the joint main body 40, the end contact portion 104 contacts the end of the joint main body 40.

  When the main body fixing portion 102 fixes the tubular portion 100 to the joint main body 40, the end contact portion 104 contacts the end of the joint main body 40. The end contact portion 104 is fixed to the cylindrical portion 100 so as to be disposed closer to the joint main body 40 than the cylindrical portion 100. As a result, in the cylindrical portion 100 during bending, a portion close to the joint main body 40 becomes difficult to bend. Since it is difficult to bend, the possibility of bending the pipe 14 at the boundary between the joint body 40 and the pipe protector 42 is reduced as compared to the case where it is easy to bend. As the probability is reduced, the possibility of breakage of the tube 14 is also reduced. As a result, the possibility of breakage of the tube 14 due to bending can be suppressed.

  According to the present invention, the possibility of tube breakage due to bending can be reduced.

It is an outline view of a flexible tube with a joint concerning one embodiment of the present invention. It is an outline view of a joint concerning one embodiment of the present invention. It is an outline view of a joint main part concerning one embodiment of the present invention. FIG. 1 is an external view of a tube protector according to an embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same components are denoted by the same reference numerals. Their names and functions are also identical. Therefore, detailed description about them will not be repeated.

[Composition of fittings]
FIG. 1 is an external view of a flexible tube with a joint 10 according to the present embodiment. In FIG. 1, the jointed flexible pipe 10 according to the present embodiment is shown in a partially cutaway state. Hereinafter, the flexible pipe with a joint according to the present embodiment will be described with reference to FIG. The flexible pipe with joint 10 according to the present embodiment includes the joint 12 according to the present embodiment, a known flexible pipe 14 and a known reducer 16. The joint 12 according to the present embodiment is connected to a well-known not-shown water pipe for water supply. The reducer 16 is connected to a known non-illustrated sprinkler. The flexible pipe 14 connects the joint 12 and the reducer 16 according to the present embodiment. One end of the flexible pipe 14 is connected to the joint 12 according to the present embodiment. The other end of the flexible tube 14 is welded to the reducer 16. Thereby, the internal space of the joint 12 according to the present embodiment and the internal space of the reducer 16 communicate with each other. The flexible tube 14 is a tube in which peak portions 20 and valley portions 22 extending along the entire circumferential direction are alternately arranged in the tube axial direction. The specific structure of the flexible pipe 14 according to the present embodiment is the same as that of a known flexible pipe. The structure of the reducer 16 according to the present embodiment is similar to that of a known reducer. Therefore, their detailed description is not repeated here.

  FIG. 2 is an external view of the joint 12 according to the present embodiment. In FIG. 2, the joint 12 and the flexible pipe 14 according to the present embodiment are shown in a partially cutaway state. Hereinafter, the joint 12 according to the present embodiment will be described with reference to FIG. In the case of the present embodiment, the joint 12 according to the present embodiment includes the joint main body 40, the pipe protecting body 42, the aligning material 44, the O-ring 46, and the pressing prevention material 48.

  In the present embodiment, the joint main body 40 is a tubular member. The joint main body 40 is a main body of the joint 12 according to the present embodiment. The pipe protector 42 is a member connected to the joint body 40. In the present embodiment, the tube protector 42 protects the flexible tube 14. The material of the aligning material 44 is vinyl chloride resin. The aligning material 44 reduces the deviation between the center of the joint body 40 and the center of the flexible tube 14. As a result, when the O-ring 46 is compressed, the bias of the compression rate between the portions is reduced. The shape of the aligning material 44 is a partially cut away annular shape. The material of the O-ring 46 is well known. Therefore, the detailed description is not repeated. An O-ring 46 seals between the fitting body 40 and the flexible tube 14. The shape of the O-ring 46 is annular. The material of the pushing prevention material 48 is 6 nylon. The pushing prevention member 48 prevents the flexible tube 14 from being pushed too far into the joint body 40. The shape of the pressing prevention member 48 is an annular shape in which a part is cut away.

  FIG. 3 is an external view of the joint main body 40 according to the present embodiment. In FIG. 3, the joint body 40 according to the present embodiment is shown in a partially cutaway state. Hereinafter, the joint main body 40 according to the present embodiment will be described with reference to FIG. 3. In the case of the present embodiment, the joint main body 40 according to the present embodiment includes the open end portion 60, the passage forming portion 62, the male screw portion 64, and the tool hooking portion 66.

  The open end 60 is disposed at the end of the fitting body 40. The open end 60 forms an opening for the tube protector 42 to enter. The passage forming portion 62 forms a passage for fluid to flow inside the joint body 40. The male screw portion 64 is formed on the outer peripheral surface of the joint body 40. The male screw portion 64 is screwed into a female screw (not shown) provided on the water supply steel pipe in order to connect the joint body 40 to the water supply steel pipe described above. The tool hooking portion 66 is provided at a position adjacent to the male screw portion 64 on the outer peripheral surface of the joint main body 40. A known tool (not shown) is hooked on the tool hook 66. Thereby, the joint body 40 can be rotated.

  The inner circumferential surface of the passage forming portion 62 is provided with a groove-like recess 80 and a push-preventive material fitting groove 82. A part of the tube protector 42 is fitted in the grooved recess 80. The pressing prevention member 48 is fitted into the pressing prevention member fitting groove 82.

  FIG. 4 is an external view of the tube protector 42 according to the present embodiment. In FIG. 4, the tube protector 42 according to the present embodiment is shown in a partially cutaway state. Hereinafter, the tube protector 42 according to the present embodiment will be described with reference to FIG. 4. The tube protector 42 has a cylindrical portion 100, a main body fixing portion 102, and an end contact portion 104. The cylindrical portion 100 forms a space communicating with the space formed by the joint body 40. The main body fixing portion 102 is connected to the cylindrical portion 100 via the end contact portion 104. The main body fixing portion 102 fixes the tubular portion 100 to the joint main body 40. The end contact portion 104 is fixed to the cylindrical portion 100 so as to be disposed closer to the joint main body 40 than the cylindrical portion 100. In the case of this embodiment, the tube protector 42 is made of 6 nylon. In the case of the present embodiment, the cylindrical portion 100, the main body fixing portion 102, and the end contact portion 104 are integrated.

  The cylindrical portion 100 has a plurality of space forming portions 120 and a plurality of interconnecting portions 122. The plurality of space forming portions 120 are annular. The plurality of space forming portions 120 form a space inside. The plurality of space forming portions 120 are arranged to form a row. In the case of the present embodiment, the outer diameters of the plurality of space forming portions 120 are smaller as the space forming portion 120 is disposed at a position farther from the main body fixing portion 102. On the other hand, in the present embodiment, the inner diameters of the plurality of space forming portions 120 are the same. As a result, in the present embodiment, the difference between the outer diameter and the inner diameter of the plurality of space forming portions 120 becomes smaller as the space forming portion 120 is disposed at a position farther from the main body fixing portion 102. The interconnections 122 are disposed one by one between each pair of space forming portions 120 adjacent to each other. The interconnects 122 interconnect the pairs of space formations 120. In the case of the present embodiment, the interconnects 122 are integral with both of the pair of space forming portions 120. The shape of the interconnecting portion 122 in this embodiment is an annular shape having an outer diameter smaller than both of the pair of space forming portions 120. The inner diameter is the same as the inner diameter of the pair of space forming portions 120 adjacent to each other. As a result, the integral part and hence the interconnecting part 122 in the present embodiment is more easily deformed than the pair of space forming parts 120.

  In the case of this embodiment, the main body fixing portion 102 has an annular convex portion 130 and a convex connecting portion 132. The shape of the annular convex portion 130 is annular. The annular convex portion 130 is fitted into the groove-like recess 80 of the joint body 40. The shape of the convex connection portion 132 is annular. The convex coupling portion 132 couples the annular convex portion 130 to the end contact portion 104. The annular convex portion 130 has a prevention surface 150 and a tapered surface 152. The locking prevention surface 150 is an annular surface orthogonal to the direction in which the cylindrical portion 100 extends. The retaining surface 150 contacts the grooved recess 80 when a force is applied to the tube protector 42 in the direction in which it is pulled out of the joint body 40. Thereby, the cylindrical portion 100 is fixed to the joint main body 40. The tapered surface 152 is disposed on the opposite side of the space forming portion 120 and the interconnecting portion 122 as viewed from the slip prevention surface 150. The tapered surface 152 is a surface that narrows away from the space forming portion 120 and the interconnecting portion 122. The tapered surface 152 transmits the reaction force received from the joint main body 40 to the convex coupling portion 132 when the main body fixing portion 102 enters the joint main body 40. Thereby, the convex connection portion 132 is elastically deformed. As a result, the main body fixing portion 102 can enter further into the joint main body 40.

  The end contact portion 104 has a contact surface 170. The contact surface 170 is an annular surface orthogonal to the direction in which the tubular portion 100 extends. The distance between the contact surface 170 and the locking surface 150 is equal to the distance from the open end 60 to the edge of the grooved recess 80. Thus, when the slip prevention surface 150 is fitted into the groove shaped recess 80, the end contact portion 104 comes in contact with the open end portion 60.

[Manufacturing method of flexible tube with joint]
The flexible tube with a joint 10 according to the present embodiment is manufactured by connecting the joint 12 according to the present embodiment, the flexible pipe 14 and the reducer 16 with each other.

  The specific procedure for connecting the joint 12 and the flexible tube 14 according to the present embodiment to each other is as follows. First, the worker causes the end of the flexible pipe 14 to penetrate the joint 12 according to the present embodiment. The end of the flexible tube 14 enters the joint 12 according to the present embodiment from the opening formed by the space forming portion 120 in the joint 12 according to the present embodiment. When the end of the flexible pipe 14 comes out of the joint 12 according to the present embodiment, the operator prevents the depression in the valley 22 at the end of the flexible pipe 14 which has come out of the joint 12 according to the present embodiment. Insert the material 48. When the anti-push-in material 48 is fitted, the worker fits the aligning material 44 in the valley 22 located closer to the end than the fitted one. When the aligning material 44 is fitted, the operator fits the O-ring 46 in the valley 22 adjacent to the fitting and the valley 22 adjacent thereto. As a result, the two O-rings 46 are fitted. When the O-ring 46 is fitted, the worker fits the aligning material 44 in the valley 22 adjacent to the valley 22 in which the O-ring 46 is fitted. As a result, as shown in FIG. 2, the O-ring 46 is fitted in the valley portion 22 so as to be adjacent to the portion of the flexible tube 14 entering the joint 12 according to the present embodiment. At the same time, the aligning material 44 is fitted so that the O-rings 46 are sandwiched. At the same time, the anti-pushing-in material 48 is fitted in the valley 22 apart from them. The operator then pulls the end of the flexible tube 14 back into the fitting body 40. As a result, the pressing prevention member 48 is fitted into the pressing prevention member fitting groove 82. When the anti-intrusion member 48 is fitted into the anti-intrusion member fitting groove 82, the operator squeezes a portion of the end of the flexible tube 14 that remains out of the joint 12 according to the present embodiment. As a result, as shown in FIG. 2, the crushed portion performs the retaining function. The flexible tube 14 does not come out of the joint 12 according to the present embodiment because the removal prevention function is performed. As a result, the connection between the joint 12 and the flexible tube 14 according to the present embodiment is completed.

  The joint 12 according to the present embodiment is manufactured by connecting the joint body 40 and the pipe protector 42 to each other. They are connected by fitting the main body fixing portion 102 of the tube protector 42 to the groove-like recess 80 of the joint main body 40. The body fixing portion 102 of the tube protector 42 enters the inside of the joint body 40 from the opening formed by the open end 60 of the joint body 40.

  The joint main body 40 and the pipe protector 42 according to the present embodiment are manufactured by a known method for manufacturing a joint. The specific procedures for manufacturing these are the same as known ones, and the detailed description thereof is not repeated here.

  The specific procedure for connecting the flexible tube 14 and the reducer 16 to one another is well known and the detailed description thereof will not be repeated here. The specific procedures for manufacturing these are also the same as known ones, and so the detailed description thereof is not repeated here.

[How to use flexible tube with fitting]
The jointed flexible pipe 10 according to the present embodiment is used to connect a known non-illustrated sprinkler to a known steel pipe for water supply. The specific procedure for that is as follows. First, the worker connects the reducer 16 to a known sprinkler head (not shown) of the sprinkler. The specific procedure for the connection is well known and the detailed description thereof will not be repeated here. When the reducer 16 and the known sprinkler head are connected, the operator bends the flexible tube 14 to place the joint 12 according to the present embodiment beside the water supply steel pipe described above. When the joint 12 according to the present embodiment is disposed beside the water supply steel pipe described above, the worker screws the male screw portion 64 of the joint main body 40 into a predetermined female screw provided on the water supply steel pipe. At the end of the screwing, the known non-illustrated sprinkler and the known steel pipe for water supply communicate.

[Description of effects according to the present embodiment]
As described above, the jointed flexible tube 10 according to the present embodiment can communicate the well-known non-illustrated sprinkler with the well-known steel pipe for water supply. In that case, even if bending occurs when bending the flexible tube 14, the joint 12 according to the present embodiment can suppress the possibility of breakage of the flexible tube 14 due to the bending.

[Modification]
The embodiments disclosed this time are illustrative in all respects. The scope of the present invention is not limited based on the embodiments described above. Of course, various design changes may be made to the embodiment described above without departing from the spirit of the present invention.

  For example, in the joint according to the present embodiment, the form of the end contact portion 104 is not limited to that described above. The joint according to the present embodiment may not have the end contact portion 104.

  The pair of space forming portions 120 and the interconnection portion 122 may not be integrated. These may be connected by members not shown.

  The form of space formation part 120 is not limited to what was mentioned above. The outer diameter may be uniform. The inner diameter may increase, for example, as it is separated from the main body fixing portion 102. The form of the interconnect 122 is also not limited to that described above.

  The thing to which the flexible pipe with a joint is connected is not limited to what was mentioned above. The pipe to which the above-mentioned joint is connected may be a pipe other than the flexible pipe 14.

DESCRIPTION OF SYMBOLS 10 ... Flexible tube 12 with fitting ... Fitting 14 ... Flexible tube 16 ... Reducer 20 ... Peak part 22 ... Valley part 40 ... Fitting body 42 ... Pipe body 44 ... Fitting body 44 ... Alignment material 46 ... O ring 48 ... Prevention of pushing Material 60 ... opening end 62 ... passage formation part 64 ... male screw part 66 ... tool hooking part 80 ... grooved recess 82 ... pushing prevention material insertion groove 100 ... cylindrical part 102 ... main body fixing part 104 ... end contact part 120 ... Space formation portion 122 ... interconnection portion 130 ... annular convex portion 132 ... convex connection portion 150 ... prevention surface 152 ... taper surface 170 ... contact surface

Claims (5)

A joint comprising a cylindrical joint body,
In addition to the joint body, a tube protector connected to the joint body is provided.
The tube protector is
A cylindrical portion which forms a space communicating with a space formed by the joint body and which is more easily deformed than the joint body,
And a main body fixing portion for fixing the cylindrical portion to the joint main body,
The cylindrical portion is
A plurality of space forming portions arranged to form a space inside and to form a row;
A joint characterized in that it is disposed between adjacent pairs of space forming portions, has an interconnecting portion mutually connecting the pair of space forming portions, and easier to deform than the pair of space forming portions. . The shape of the plurality of space forming portions is annular,
The joint according to claim 1, wherein the shape of the interconnection is an annular shape having an outer diameter smaller than both of the pair of space forming portions. The difference between the outer diameter and the inner diameter of the plurality of space forming portions is smaller as the space forming portion is disposed at a position farther from the main body fixing portion,
The inner diameters of the plurality of space forming portions are the same,
The joint of claim 2 wherein the inner diameter of the interconnect is the same as the inner diameter of the plurality of space formations.   The joint of claim 1, wherein the interconnect is integral with both of the pair of space formations.   The pipe protector is fixed to the cylindrical portion so as to be disposed closer to the joint main body than the cylindrical portion, and the main body fixing portion fixes the cylindrical portion to the joint main end of the joint main body The joint of claim 1, further comprising an end contact portion contacting the end of the joint.

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