JP2008019895A - Coupler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coupler consisting of a nose and a body whose material costs can be reduced, while securing the strength of a collar for retaining a hard ball, and reducing shaving margin during the manufacture of the collar. <P>SOLUTION: The body 32 is formed with a recessed insertion part 50. A moving valve 34 is provided in the recessed insertion part 50. The hard ball 58 is positioned in a hole 54 in a main body 33. The collar 60 for preventing the hard ball 58 from dropping off and allowing the hard ball 58 to be released is provided on the outside of the main body 33. The collar 60 comprises a steel member 70 forming a surface of contact with the hard ball 58, and a resin cylinder part 72 formed integrally with the steel member 70. A nose 12 is provided with a moving valve 14. A recess part 13A for fitting the hard ball 58 therein is formed on the outer periphery of a nose body 13. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a coupler comprising a male-type nose and a female-type body provided with a flow path portion, and a moving valve mounted on the nose and the body.

  Conventionally, a coupler using a poppet valve is known as a joint between hoses for transferring a fluid such as water or oil under high pressure. FIG. 4 is a half cut sectional view of a conventional high pressure coupler comprising a nose and a body, and FIG. 5 is a half cut sectional view showing a state in which these are coupled.

  The coupler 100 includes a male nose 102 and a female body 122. A hard ball 142 is provided in the hole on the peripheral surface of the body 122, and a collar 140 that supports the hard ball 142 is provided on the outer peripheral surface of the body 122. The nose 102 and the body 122 are equipped with poppets 104 and 124 with their tips facing each other.

  A poppet 104 is movably attached to the nose 102 via a spring 108 on a locking ring 106 on the inner peripheral surface of the nose body 103. Further, the tip of the inner peripheral surface of the nose body 103 is reduced in diameter to form an overhang portion 110, and the poppet 104 is pressed against the overhang portion 110 by a spring 108.

  On the other hand, the body 122 is provided with a concave insertion portion 132 into which the nose 102 is inserted. On the back side of the concave insertion portion 132, a poppet 124 is movably attached to a locking ring 126 on the inner peripheral surface of the body main body 123 via a spring 128. Further, the inner peripheral surface of the body main body 123 is reduced in diameter to form an overhang portion 130, and the poppet 124 is pressed against the overhang portion 130 by a spring 128.

As shown in FIG. 4, the tip 104 </ b> A of the poppet 104 protrudes from the tip of the nose body 103 before the connection between the nose 102 and the body 122. Further, in the concave insertion portion 132, the tip 124 </ b> A of the poppet 124 projects from the overhanging portion 130 of the body main body 123. As shown in FIG. 5, when the nose 102 is inserted into the body 122, the hard ball 142 is fitted into the recess 103 </ b> A formed on the peripheral surface of the nose 102, the nose 102 and the body 122 are connected, and the body 122 of the nose 102 is connected. The withdrawal from the is prevented. Further, when the nose 102 and the body 122 are connected, the poppets 104 and 124 are pushed against the force of the springs 108 and 128 by abutting the poppets 104 and 124, respectively. As a result, gaps are formed between the poppet 104 and the overhanging portion 110 and between the poppet 124 and the overhanging portion 130, and the fluid passes through these communicating portions 120 (for example, see Patent Document 1). reference).
JP-A-53-116523

  In the coupler 100 for high pressure (for example, a type corresponding to a pressure of 68.5 MPa), a force is applied to the contact portion between the collar 140 and the hard ball 142. Therefore, the collar 140 needs to have high strength. Steel materials such as stainless steel are used.

  However, in order to manufacture the collar 140, it is necessary to cut an annular steel material using an NC processing machine or the like, which requires a large cutting allowance, takes time for processing, and wastes material. Further, the collar 140 needs to be made of a steel material even in a portion that does not require high strength other than the portion that contacts the hard ball 142, and the material cost is high.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a coupler capable of ensuring the strength of a collar that supports a hard ball, improving workability, and reducing the cost of materials. .

  The invention according to claim 1 is a coupler comprising a nose connected to one pipe and a body connected to the other pipe and having a concave insertion portion into which the nose is inserted, wherein the nose A first movement valve that is movably mounted to close or open the flow passage portion of the nose, and a second movement valve that is movably mounted to the concave insertion portion and closes or opens the flow passage portion of the concave insertion portion. A plurality of hard balls that are provided in the concave insertion portion, and are fitted into the concave portion of the outer peripheral surface of the nose, and fix the nose to the concave insertion portion. A collar that is externally movably mounted on the body, prevents the hard ball from coming off, and allows the hard ball to be detached from the recess by movement; and the collar is a steel material that serves as a contact surface for the hard ball; It is characterized by being configured in a serial steel and the cylindrical part made integrally molded resin.

  According to the first aspect of the present invention, a plurality of hard balls are provided in the concave insertion portion of the body, and a plurality of hard balls are prevented from coming off by the collar movably mounted on the body, and the collar is moved. By doing so, it becomes possible to detach a plurality of hard balls from the recess. When the nose is inserted into the concave insertion portion, a plurality of hard balls are fitted into the concave portion on the outer peripheral surface of the nose, and the nose is fixed to the concave insertion portion. At that time, the first moving valve and the second moving valve are moved in contact with each other, and the flow path portion of the nose and the flow passage portion of the concave insertion portion are opened. This makes it possible to transfer the fluid under pressure. The collar is composed of a steel material that will be the contact surface of the hard sphere and a resin tube that is molded integrally with the steel material, ensuring high strength and hardness on the contact surface of the hard sphere, and transferring fluid at high pressure Even so, the hard ball is stably pressed by the steel material, and damage to the collar is suppressed. In addition, since the collar is made of a resin-made cylinder part that does not require high strength other than the contact surface of the hard sphere, it does not require cutting work as in the case where the entire collar is made of steel. Cost reduction and color weight reduction.

  According to a second aspect of the present invention, in the coupler according to the first aspect, the steel material is an annular body having a groove formed on an outer peripheral surface.

  In the invention according to claim 2, the steel material is an annular body having a groove formed on the outer peripheral surface, and when the resin is integrally molded, the resin enters the groove, and the steel material and the resin cylinder portion are firmly formed. Be joined. In addition, since the steel material is a ring, a plurality of hard balls provided in the concave insertion portion can be stably pressed by the ring.

  The coupler which concerns on this invention can ensure the high intensity | strength and hardness of the color which hold | suppresses a hard ball, even if a fluid is transferred at high pressure. Further, as compared with the case where the entire collar is formed of steel, the cutting allowance is small, the cost can be reduced, and the collar can be reduced in weight.

  Hereinafter, embodiments of the coupler of the present invention will be described with reference to the drawings.

  FIG. 1 is a half-cut sectional view showing a coupler 10 according to an embodiment of the present invention. The coupler 10 includes a nose 12 that is a male metal fitting and a body 32 that is a female metal fitting. Although not shown, the nose 12 is connected to one pipe, and the body 32 is connected to the other pipe. A collar 60 for connecting the body 32 and the nose 12 is provided on the outer peripheral surface of the body 32. The nose 12 and the body 32 are equipped with moving valves 14 and 34 having tips opposed to each other.

  A locking member 16 is fitted into the nose body 13 in the nose body 13, and a movable valve 14 is movably attached to the locking member 16 via a spring 18. The locking member 16 is fixed in the nose body 13 by being locked to a stop ring 20 fitted in the groove of the nose body 13. The locking member 16 is provided with a restricting portion 16A that supports the inner surface of the spring 18. In addition, at the tip of the nose body 13, the projecting portion 22 is formed by gradually reducing the diameter of the inner peripheral surface. The moving valve 14 is gradually reduced in diameter along the shape of the overhanging portion 22 at the distal end side, and a rubber ring-shaped seal member 24 is provided at a position where it contacts the overhanging portion 22. The moving valve 14 is pressed against the overhanging portion 22 by the spring 18, and the seal member 24 is in contact with the overhanging portion 22.

  Further, a protrusion 14 A is formed at the tip of the moving valve 14, and the protrusion 14 A protrudes from the tip of the nose body 13. This protrusion 14A is configured to abut against the protrusion 34A of the moving valve 34 on the body 32 side. In addition, a flow path portion 26 through which a fluid can pass is formed on the back side of the moving valve 14.

  On the other hand, the body 32 is formed with a concave insertion portion 50 into which the nose 12 is inserted. A locking member 36 is fitted inside the body main body 33 on the back side of the concave insertion portion 50, and the moving valve 34 is movably attached to the locking member 36 via a spring 38. The locking member 36 is fixed in the body main body 33 by being locked to a locking ring 40 fitted in the groove of the body main body 33. The locking member 36 is provided with a restricting portion 36 </ b> A that supports the inner surface of the spring 38. Further, on the insertion opening side of the concave insertion portion 50, an overhang portion 42 is formed by gradually reducing the inner peripheral surface of the body main body 33.

  The moving valve 34 is gradually reduced in diameter along the shape of the overhanging portion 42 at the distal end side, and a rubber ring-shaped seal member 44 is provided at a position in contact with the overhanging portion 42. The moving valve 34 is pressed against the overhanging portion 42 by a spring 38, and the seal member 44 is in contact with the overhanging portion 42. A protrusion 34A is formed at the tip of the moving valve 34, and this protrusion 34A is configured to abut against the protrusion 14A of the moving valve 14 on the nose 12 side.

  In addition, inside the concave insertion portion 50, the distal end side is enlarged from the projecting portion 42, an annular groove portion 46 is formed in the enlarged diameter portion, and an O-ring 48 is fitted in the groove portion 46.

  Inside the collar 60, a step portion 52 is formed on the outer peripheral surface of the body body 33, and a plurality of holes 54 having a trapezoidal cross section are formed on the same peripheral surface. Further, a circumferential groove 56 is formed on the tip side of the stepped portion 52. A coil spring 62 is fitted into the stepped portion 52, and one end of the coil spring 62 is in contact with the body main body 33. Further, hard balls 58 are accommodated in the plurality of holes 54, respectively. The hard ball 58 is made of, for example, martensitic stainless steel.

  A step portion 64 is formed on the inner peripheral side of the collar 60 so as to face the step portion 52. The collar 60 is fitted to the outside of the body main body 33, and the other end of the coil spring 62 contacts the step portion 64. ing. Thus, when the collar 60 is moved in the axial direction (arrow A direction), the coil spring 62 is pressed with the stepped portion 64. Further, the collar 60 is prevented from coming off by fitting the retaining ring 68 into the diameter-expanded portion 74 of the collar 60 facing the circumferential groove 56 of the body main body 33.

  As shown in FIG. 2, the collar 60 includes an annular steel material 70 that serves as a contact surface for the hard sphere 58, and a resin cylindrical portion 72 that is integrally formed with the steel material 70 on the outside of the steel material 70. The steel material 70 is formed to have an inner diameter smaller than the inner diameter of the step portion 64, and is formed so that the inner peripheral surface of the steel material 70 protrudes obliquely from the step portion 64. In addition, a plurality of irregularities are formed on the outer peripheral surface of the cylindrical portion 72 so that the user can easily move the collar 60 with his / her finger.

  Here, a method for manufacturing the collar 60 will be described. First, a predetermined solution treatment is performed on the steel material 70 to form a plurality of nanoscale grooves having a width of 20 to 30 nm and a depth of about 20 to 30 nm on the outer peripheral surface. The steel material 70 is inserted into a mold and integrally molded with a resin such as PBT (polybutylene terephthalate), thereby forming a resin cylindrical portion 72. Thereby, resin enters into the plurality of grooves on the outer peripheral surface of the steel material 70, and the steel material 70 and the cylindrical portion 72 are joined by the anchor effect. For this reason, the steel material 70 and the cylinder part 72 can be joined firmly.

  In addition, as a material of the steel material 70, for example, S45C to S48C, S45CL and the like are used, and as a material of the cylindrical portion 72, polypropylene, polyacetal and the like are used in addition to PBT (polybutylene terephthalate). The thickness of the steel material 70 is set to 0.1 to 20.0 mm in order to ensure strength.

  As shown in FIG. 1, the hard ball 58 is pressed down on the inner peripheral surface of the steel material 70 constituting the collar 60, but the inner peripheral surface of the steel material 70 is elastically moved in the arrow A direction. The pressing of the hard ball 58 is released, and the hard ball 58 moves freely in the vertical direction by entering the enlarged diameter portion 74 of the collar 60. That is, by applying a force against the coil spring 62 to the collar 60, the hard ball 58 can freely move around in the hole 54, and the nose 12 can be inserted or removed in this state.

  A groove-like recess 13A that receives the hard ball 58 when inserted into the concave insertion portion 50 is formed on the outer periphery of the nose body 13, and the hard ball 58 is accommodated in the recess 13A. 12 is fixed in the concave insertion portion 50. As a result, the body 32 and the nose 12 are connected.

  Next, the operation of the coupler 10 will be described.

  As shown in FIGS. 1 and 3, when connecting the nose 12 and the body 32, the collar 60 is moved in the direction of arrow A against the force of the coil spring 62. As a result, the hard ball 58 can freely move in the up-down direction within the enlarged diameter portion 74, and the nose 12 can be inserted into the concave insertion portion 50. When the nose 12 is inserted, a plurality of hard balls 58 ride on the tip of the nose body 13, and when the nose 12 is inserted to the back, the moving valves 14 and 34 are abutted to press the protruding portions 14 </ b> A and the protruding portions 34 </ b> A. , 34 are pushed against the force of the springs 18, 38, respectively.

  In this state, when the collar 60 is returned to the original position by the force of the coil spring 62, the hard ball 58 is accommodated in the recess 13A of the nose body 13 and the body 32 and the nose 12 are connected. The nose 12 is sealed by the O-ring 48 of the body 32. In this state, gaps are formed between the seal member 24 and the overhanging portion 22 of the moving valve 14 and between the seal member 44 and the overhanging portion 42 of the moving valve 34, and the flow path between the nose 12 and the body 32. The units 26 and 80 communicate with each other. Then, the fluid passes through the flow path portions 26 and 80 under pressure.

  On the other hand, when separating the nose 12 and the body 32, the collar 60 is moved in the axial direction (arrow A direction), so that the hard ball 58 can freely move in the vertical direction within the enlarged diameter portion 74. Since 58 is detached from the recess 13 </ b> A, the nose 12 can be pulled out of the recessed insertion portion 50.

  When the nose 12 and the body 32 are separated, as shown in FIG. 1, the moving valve 14 of the nose 12 is pressed against the overhanging portion 22 by the spring 18 and sealed at the contact surface between the seal member 24 and the overhanging portion 22. . Further, the moving valve 34 of the body 32 is pressed against the overhanging portion 42 by the spring 38 and sealed at the contact surface between the seal member 44 and the overhanging portion 42.

  In such a coupler 10, as shown in FIG. 3, a plurality of hard balls 58 are pressed down on the inner peripheral surface of the steel material 70 constituting the collar 60. When a fluid flows through the flow path portions 26 and 80 under pressure, a portion that contacts the hard ball 58 of the collar 60 is subjected to internal pressure, but by forming a contact surface with the hard ball 58 with the steel material 70, the necessary strength and hardness can be obtained. Can be secured. For this reason, even if a fluid is flowed under high pressure, the plurality of hard balls 58 are stably pressed by the steel material 70, and damage to the collar 60 can be suppressed. In addition, since the collar 60 is formed of a resin-made cylindrical portion 72 other than the contact surface of the hard ball 58 and does not require high strength, cutting work is required as in the case where the entire collar is formed of steel. The cost of the material can be reduced, and the collar 60 can be reduced in weight.

  Further, since the steel material 70 is annular, the plurality of hard balls 58 provided in the concave insertion portion 50 can be stably pressed by the annular steel material 70.

It is a half cut sectional view showing a coupler concerning a 1st embodiment of the present invention, and is a figure showing the state where a nose and a body were separated. FIG. 2 is a half-cut cross-sectional view showing a collar that is sheathed on the body of the coupler shown in FIG. 1. FIG. 2 is a half-cut sectional view showing a state in which a nose and a body of the coupler shown in FIG. 1 are coupled. It is a half-cut sectional view which shows the separation state of the conventional coupler. It is a half-cut sectional view which shows the coupling state of the conventional coupler.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Coupler 12 Nose 13 Nose main body 13A Recessed part 14 Movement valve 16 Locking member 18 Spring 22 Overhang part 24 Seal member 26 Flow path part 32 Body 33 Body main body 34 Movement valve 36 Locking member 38 Spring 42 Overhang part 44 Seal member 50 concave insertion portion 52 step portion 54 hole 58 hard ball 60 collar 62 coil spring 70 steel material 72 cylindrical portion 74 expanded diameter portion

Claims (2)

A coupler having a nose connected to one pipe and a body connected to the other pipe and having a concave insertion portion into which the nose is inserted,
A first movement valve that is movably mounted on the nose and closes or opens the flow path portion of the nose;
A second moving valve that is movably attached to the concave insertion portion and closes or opens the flow path portion of the concave insertion portion;
A plurality of hard balls that are provided in the concave insertion portion and fit into the concave portion of the outer peripheral surface of the nose when the nose is inserted into the concave insertion portion, and fix the nose to the concave insertion portion;
A collar that is externally movably mounted on the body, prevents the hard ball from coming off, and allows the hard ball to be detached from the recess by movement;
The said collar was comprised with the steel material used as the contact surface of the said hard sphere, and the resin-made cylinder part integrally molded with the said steel material, The coupler characterized by the above-mentioned.   The coupler according to claim 1, wherein the steel material is a ring body having a groove formed on an outer peripheral surface.

Images