JP2006329393A - Coupling fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coupling fitting providing easy locking at coupling, and easy unlocking. <P>SOLUTION: The coupling fitting is characterized by that it is provided with a lock lever 40 turnably pivoted on at least one circumferential wall of coupling fitting bodies 1a and 1b, and capable of moving between a locking position for locking a coupled state of the pair of coupling fitting bodies 1a and 1b, and an unlocking position for unlocking the coupled state, and a lock pawl 44 provided on the lock lever 40, inserted between a protruding part end face 8c of an engagement protruding part 8 of one coupling fitting body 1a, and a recessed part end face 7a of an engagement recessed part 7 of the other coupling fitting body 1b in the coupled state when the lock lever is in the locking position, and regulating axial movement of the pair of coupling fitting bodies 1a and 1b to lock the pair of coupling fitting bodies 1a and 1b in the coupled state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a pair of fittings having no distinction between males and females for connecting hoses such as fire fighting hoses to each other, connecting pipes of liquid transport pipes, or connecting pipes such as steel pipes.

  For example, the applicant has developed a joint fitting composed of a pair of identically-structured joint bracket bodies that connect a hose such as a fire hose to each other or a liquid transport pipe. Registered (for example, refer to Patent Document 1).

  The structure of the coupling fitting is configured as shown in FIGS. In addition, this coupling metal fitting is a thing at the time of applying to the coupling | bonding of a fire hose. The coupling fitting is composed of a pair of coupling fitting bodies 1a and 1b having the same structure, and fire hose 2a and 2b are connected to the coupling fitting bodies 1a and 1b, respectively.

  These coupling metal bodies 1a and 1b are each provided with a cylindrical body 3, which has a substantially cylindrical shape, and a hose attachment portion 4 having serrated irregularities is formed on the inner peripheral surface thereof. Yes. And the edge part of fire hose 2a, 2b is inserted in this hose attachment part 4, The outer peripheral surface of this hose is pressed against this hose attachment part 4 by the crimping ring (not shown) from the internal peripheral surface of these hoses. Install this fire hose.

  A cylindrical sealing surface member 5 is screwed on the inner peripheral surface of the front end portion of the cylinder body 3, and the front end surface of the sealing surface member 5 is formed as a sealing surface. A sealing member 6 such as is attached. Therefore, when the coupling metal bodies 1a and 1b are fitted and coupled to each other in the axial direction, the seal members 6 are abutted with each other to communicate with the inside of the cylindrical body 3 and have a sealing property. To maintain.

  A plurality of, for example, six fitting projections 8 are integrally projected from the front end of the cylinder body 3. These fitting protrusions 8 are arranged at equal intervals in the circumferential direction, and protrude in the axial direction with respect to the seal surface of the seal surface member 5. In addition, a space between these fitting projections 8 is formed as a fitting recess 7. When these fittings 1a and 1b are abutted in the axial direction, The fitting convex portion 8 is fitted in the fitting concave portion 7 of the other coupling fitting main body 1b, and the fitting convex portion 8 of the other coupling fitting main body 1b is fitted in the fitting concave portion 7 of one coupling fitting main body 1a. Mates and fits in a complementary fashion.

  In this case, the width of the fitting recess 7 is slightly wider than the width of the fitting protrusion 8. Accordingly, the fitting convex portions 8 are fitted in the fitting concave portions 7 in the axial direction, and are rotatable by a predetermined amount in the circumferential direction.

  Further, a stepped hook-shaped locking hook 9 is formed on one side surface 8a of the fitting convex 8, respectively, and these are engaged with the locking hook of the mating convex on the other side and the circumferential direction. It is comprised so that it may engage with. Therefore, in a state in which these fitting projections 8 are fitted in the mating fitting recesses 7 in the axial direction, the coupling metal bodies 1a and 1b are rotated with respect to each other, and one of the fitting projections 8 is When the side surfaces 8a are close to each other, these locking hooks 9 are engaged with each other to lock in the axial direction, and the coupling metal bodies 1a and 1b are coupled to each other. Note that a bent portion 11 is formed at the base portion of the locking collar portion 9 to prevent stress concentration at this portion. Further, the leading end corners of the other side surfaces of these fitting convex portions are formed in an arc shape to form guide portions 12, and these guide portions 12 come into contact with each other when they are fitted. .

  Further, the locking surfaces of these locking collars 9 are inclined in an overhanging manner by a predetermined angle with respect to the circumferential direction, and these coupling metal bodies 1a are caused by internal water pressure or the like in a state where they are fitted. , 1b, when a load acting in a direction separating them from each other is applied, a rotational force is generated in a direction in which the side surfaces 8a are pressed against each other, so that these locking hooks 9 are fitted more strongly, and the coupling metal bodies 1a, 1b It is configured to surely prevent the omission or the like.

  The dimensions of each part are set so that a gap is formed between the front end face of the fitting convex part 8 and the back wall surface of the fitting concave part 7 in a state where the locking collar part 9 is fitted. Yes. Therefore, this can move so that these fitting convex part 8 and fitting concave part 7 may mutually enter into an axial direction from the state which the said locking hook part 9 engaged.

  Moreover, the other side surface 8b of these fitting convex part 8 inclines with respect to the axial direction of these coupling metal main bodies 1a and 1b. Therefore, the fitting convex portion 8 is formed in a taper shape such that the circumferential width becomes narrower as it goes to the tip portion, and the fitting concave portion 7 similarly has a circumferential width as it goes to the inner portion. Is formed in a taper shape such that becomes narrower. Thereby, fitting of these fitting convex part 8 and fitting concave part 7 becomes easy. Note that one side surface on which the locking collar portion 9 is formed is formed substantially parallel to the axial direction of the coupling metal bodies 1a and 1b.

  Further, an urging mechanism 10 is provided on each of the other side surfaces 8b of the fitting convex portions 8. These urging mechanisms 10 are constituted by urging members, for example, steel balls 15, which are slidably accommodated in a cylindrical case member 14, and springs 16 which urge the steel balls 15 in the protruding direction. These urging mechanisms 10 are embedded in the other side surfaces of the fitting projections 8. Therefore, when these fitting projections 8 are fitted into the mating fitting recesses 7, the steel balls 15 come into contact with each other and are pressed against each other, and the other side surface of these fitting projections 8. As a result, the one side surface 8a of these fitting convex portions 8 is urged so as to be close to each other, and as described above, the locking collar portions 9 on these one side surfaces are Energized to engage.

  Further, a plurality of tool grooves 20 are formed on the outer peripheral surfaces of these coupling metal bodies 1a and 1b. These tool grooves 20 are formed in a shape that can be fitted with a tool such as a wrench. In the unlikely event that the coupling metal bodies 1a and 1b cannot be uncoupled due to sand or the like being engaged, a tool such as a wrench is fitted into these tool grooves 20 and the coupling metal bodies 1a and 1b are fitted. The connection can be released by forcibly turning.

By the way, in such a coupling metal fitting, the fitting convex part 8 and the fitting concave part 7 are fitted in the axial direction, and the locking collar part 9 is engaged with each other in the circumferential direction. When a positive water pressure or the like is applied in the coupling fitting, a large axial load acting on the coupling fitting main bodies 1a, 1b acts on the coupling fitting main body 1a, 1b. 9 is supported by the engagement. For this reason, when the pressure is acting on the inside, the coupling of the coupling metal is not inadvertently released.
Japanese Patent No. 3107507

  However, the above-described joint fitting has dimensions of each part so that a gap is formed between the front end face of the fitting convex part 8 and the back wall surface of the fitting concave part 7 in a state in which the locking collar part 9 is fitted. Is set. Therefore, from the state in which the locking collar portion 9 is engaged, the fitting convex portion 8 and the fitting concave portion 7 are movable so as to further enter each other in the axial direction.

  Further, the fitting projection 8 is formed in a tapered shape such that the circumferential width becomes narrower toward the tip so that the fitting projection 8 and the fitting recess 7 can be easily fitted. Similarly, the fitting recess 7 is formed in a taper shape such that the width in the circumferential direction becomes narrower toward the inner part.

  Further, biasing mechanisms 10 are provided on the side surfaces 8b of the fitting convex portions 8, respectively. These urging mechanisms 10 are constituted by urging members, for example, steel balls 15, which are slidably accommodated in a cylindrical case member 14, and springs 16 which urge the steel balls 15 in the protruding direction. These urging mechanisms 10 are embedded in the other side surfaces of the fitting projections 8. Therefore, when these fitting projections 8 are fitted into the mating fitting recesses 7, the steel balls 15 come into contact with each other and are pressed against each other, and the other side surface of these fitting projections 8. As a result, one side surface 8a of the fitting convex portion 8 is urged so as to be close to each other, and the locking collar portion 9 is urged so as to engage with each other. .

  Therefore, even when the locking hooks 9 are engaged with each other, the coupling metal bodies 1a and 1b have a margin due to the pressing force of the packing in the circumferential direction. When an external force is applied to the locking hook 9 against the urging force of the spring 16 in the disengaging direction, the engagement of the locking hook 9 may be released, and the coupling metal bodies 1a and 1b may be released.

  The present invention has been made paying attention to the above circumstances, the purpose of the present invention is a coupling bracket composed of a pair of coupling bracket bodies without distinction between male and female, and can be easily locked at the time of coupling, Further, the present invention provides a coupling fitting that can be easily unlocked.

  In order to achieve the above object, the present invention provides a pair of coupling metal bodies, a plurality of fitting projections arranged in the circumferential direction of the coupling metal body and projecting in the axial direction, and these fittings. A fitting concave portion formed between the mating convex portions, and the fitting convex portion and the fitting concave portion of the pair of coupling metal bodies are pivoted to the fitting concave portion and the fitting convex portion of the mating coupling metal body on the other side. The fitting protrusions are engaged with the fitting protrusions of the mating fitting main body in the circumferential direction to restrict the movement in the axial direction. In the coupling fitting in which a locking collar portion is formed to be engaged with the coupling bracket, it is pivotally supported on at least one peripheral wall of the pair of coupling fitting main bodies, and locks the pair of coupling fitting main bodies in a coupled state. A lock lever movable between a lock position and an unlock position for releasing the coupling state; Between the convex end surface of the fitting convex portion of the one coupling fitting body and the concave end surface of the fitting concave portion of the other coupling fitting main body that are in the coupled state when the locking lever is in the locked position. And a locking claw for restricting movement of the pair of coupling metal bodies in the axial direction and locking the pair of coupling metal bodies in a coupled state.

  According to a second aspect of the present invention, the lock lever according to the first aspect includes a pair of members curved in an arc shape having substantially the same curvature as the curvature of the outer peripheral wall of the coupling metal body, and the coupling metal body is in the locked position. It is joined along the outer peripheral wall, and protrudes radially outward from the outer peripheral wall of the coupling fitting body at the unlocked position.

  According to a third aspect of the present invention, the lock lever according to the first aspect of the present invention is characterized in that the lock lever is rotatably installed on a side surface of the coupling metal body with a pivot shaft as a fulcrum, and the pivot shaft is supported at both ends.

  According to a fourth aspect of the present invention, at least one pair of the lock levers of the first aspect are provided on the pair of coupling metal bodies, and the pair of curved levers are curved in an arc shape having substantially the same curvature as the curvature of the outer peripheral wall of the coupling metal body. And is joined along the outer peripheral wall of the coupling fitting main body at the lock position, and protrudes radially outward from the outer peripheral wall of the coupling fitting main body at the unlocked position to form a handle. It is characterized by.

  According to a fifth aspect of the present invention, one of the pair of coupling metal bodies according to the first aspect is fixedly installed in equipment, and the lock lever is provided in a coupling metal body that is not fixedly installed in the equipment, and the coupling metal It consists of a pair of arcuately curved members having substantially the same curvature as the curvature of the outer peripheral wall of the main body, and is joined along the outer peripheral wall of the coupling fitting main body at the locked position, and the coupling at the unlocked position. A handle is formed by projecting radially outward from the outer peripheral wall of the metal fitting body.

  A sixth aspect of the present invention is characterized in that the lock lever of the first aspect is temporarily fixed to the temporary fixing device at the locked position.

  According to the said structure, when couple | bonding a pair of coupling metal main body, the fitting convex part of one coupling metal body and the fitting recessed part of the other coupling metal body are each positioned. Then, when the pair of coupling metal bodies are pushed in the axial direction, the fitting convex portion and the fitting concave portion are fitted in the axial direction, and the locking collar portions are engaged with each other in the circumferential direction.

  In this state, when the lock lever is rotated to the lock position, the projection end surface of the fitting convex portion of the one coupling metal body and the other coupling metal in which the lock claw provided on the lock lever is in the coupling state Inserted between the fitting recesses of the main body and the recess end surface, the movement of the pair of coupling metal bodies in the axial direction is restricted, and the pair of coupling metal bodies are locked in the coupled state. Further, when the lock lever is rotated to the unlock position, the lock claw is removed from between the convex end surface of the fitting convex portion of one coupling metal body and the concave end surface of the fitting concave portion of the other coupling metal body. The pair of coupling metal bodies can be moved in the axial direction, and the coupled state of the pair of coupling metal bodies is unlocked.

  According to the present invention, there is an effect that, in a coupling metal composed of a pair of coupling metal bodies, the lock lever can be easily locked or unlocked by rotating the lock lever at the time of coupling.

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

  1 to 3 show the first embodiment, and show a large-diameter (100 to 300 mm, etc.) coupling fitting applied to a fluid piping connection such as a fire hose connection or a food plant piping connection. is there. The basic structure of the coupling metal body is the same as the conventional coupling metal bodies 1a and 1b shown in FIGS. 4 to 6, and the same components are denoted by the same reference numerals and description thereof is omitted.

  One of the pair of coupling metal bodies 1a and 1b, for example, the coupling metal body 1b is fixed to a facility such as a pump (not shown), and the other coupling metal body 1a is connected to a hose or a pipe (not shown).

  One coupling fitting main body 1a that is not fixed to equipment such as a pump has a fitting concave portion 7 and a fitting convex portion 8 as shown in FIG. The fitting concave portion 7 and the fitting convex portion 8 can be fitted in the fitting concave portion 7 and the fitting convex portion 8 of the other coupling metal body 1b in the axial direction. Further, these fitting projections 8 are engaged with the mating fitting projections 8 in the circumferential direction to restrict the movement in the axial direction, and the pair of coupling metal bodies 1a and 1b are locked in the axial direction. A locking collar 9 is formed and is engaged with the mating locking collar 9 on the other side.

  Since the pair of coupling metal bodies 1a and 1b have the same structure, a description will be given of one coupling metal body 1a. A liner 31 is provided on the front end surface of the coupling metal body 1a so as to abut against each other in the axial direction. The fitting concave portion 7 and the fitting convex portion 8 are arranged in the circumferential direction so as to surround the liner 31.

  An end surface 32 orthogonal to the axial direction of the coupling metal body 1a is formed at the rear end of the coupling metal body 1a, and a cylindrical part 33 for fitting and connecting a hose or the like is provided behind the end surface 32. Yes.

  A lever mounting portion 34 is provided at two positions in the circumferential direction of the coupling metal body 1 a, in the present embodiment, at an end face 32 at a position displaced by 180 °, and a bracket 35 is provided at the lever mounting portion 34. As shown in FIG. 2, the bracket 35 has an arcuate shape that has substantially the same curvature as the curvature of the outer peripheral wall of the fitting body 1a, and two bracket mounting holes 36 are provided in the middle portion. . The bracket 35 is fixed to the lever mounting portion 34 by a bolt 37 inserted through the bracket mounting hole 36.

  Furthermore, a notch 38 is provided at both ends of the bracket 35, and a lever mounting hole 39 is provided toward the notch 38. One end portion of the lock lever 40 is rotatably provided at the notch portions 38 at both ends of the bracket 35. The lock lever 40 has an arcuate shape that is substantially the same curvature as the curvature of the outer peripheral wall of the coupling metal body 1a, and is arranged so that the convex surfaces are back to back. It is fixed to. Therefore, the lock lever 40 can be rotated with the bolt 41 as a fulcrum, and the free end of the lock lever 40 serves as the handle 42. The bolt 41 as the pivot shaft has one end fixed to the coupling metal body 1a and the other end fixed to the lever mounting hole 39 of the bracket 35, so that the bolt 41 is supported at both ends and is firmly supported. Yes.

  Further, a screw hole 43 is provided on the convex surface in the substantially middle portion of the lock lever 40. A lock claw 44 is fixed to the screw hole 43 by a fixing screw 45. The lock claw 44 is formed by bending a metal piece into an L shape, one end of which is formed in a fixed portion 46 and the other end is formed in an arcuate insertion portion 47.

  When the lock lever 40 is rotated about the bolt 41 and joined along the outer peripheral wall of the coupling metal body 1a in a state where the pair of coupling metal bodies 1a and 1b are coupled (lock position), the lock claw 44 is provided. The insertion portion 47 is inserted between the convex end surface 8c of the fitting convex portion 8 of one coupling fitting main body 1a and the concave end surface 7a of the fitting concave portion 7 of the other coupling fitting main body 1b. Accordingly, the axial movement of the pair of coupling metal bodies 1a and 1b is restricted, and the pair of coupling metal bodies 1a and 1b are locked in the coupled state.

  Further, when the lock is released from the state where the pair of coupling metal bodies 1a and 1b are coupled, the lock lever 40 is turned around the bolt 41 as a fulcrum to radially outward from the outer peripheral wall of the coupling metal body 1a. When the protrusion 47 is protruded (unlocked position), the insertion portion 47 of the lock claw 44 has a concave end surface 8c of the fitting convex portion 8 of one coupling metal body 1a and a concave portion of the fitting concave portion 7 of the other coupling metal body 1b. It is extracted from between the end face 7a. Then, the pair of coupling metal bodies 1a and 1b can move in the axial direction, and the locked state of the pair of coupling metal bodies 1a and 1b is released.

  Accordingly, the pair of coupling metal bodies 1a and 1b can relatively rotate in the circumferential direction, and when the pair of coupling metal bodies 1a and 1b is released from the pair, A pair of coupling metal bodies 1a, 1a, 1b, and a pair of coupling metal bodies 1a, 1b are separated from each other by releasing the engagement state by grasping a handle 42 made of a pair of lock levers 40 protruding in the direction. 1b can be cut off.

  In this case, it is possible to lock and unlock by simply rotating the lock lever 40 without lifting the coupled coupling body 1a, 1b, and to a relatively heavy coupling metal having a large diameter (100 to 300 mm, etc.). Preferred.

  Further, as shown in FIG. 2B, an engagement hole 48 penetrating in the thickness direction of the lock lever 40 is formed in the vicinity of the free ends of the pair of lock levers 40. Further, as shown in FIG. 1 (a), at the end face 32 of the coupling metal body 1a, the portion facing the engagement hole 48 when the lock lever 40 is turned around the bolt 41 to the lock position is provided. A ball plunger 49 is provided as a temporary fixing device. The ball plunger 49 is basically composed of a ball 50 such as a steel ball and a spring 51 that urges the ball 50 in a direction protruding from the end surface 32, as in the urging mechanism 10 shown in FIG. ing. When the lock lever 40 is rotated about the bolt 41 to the lock position, the ball 50 is elastically engaged with the engagement hole 48 of the lock lever 40, and the lock lever 40 is held at the lock position. It is configured not to be accidentally unlocked.

  The lock lever 40 may be provided on both of the pair of coupling metal bodies 1a and 1b or on one side.

  It should be noted that the above-mentioned joint fittings can be applied as joint fittings for structures such as steel pipes in addition to hose fittings in civil engineering flood control, ships, oil plants, unloading equipment, food industry, and other plants. . Further, the present invention is not limited to a coupling fitting having a large diameter (100 to 300 mm or the like), and can be applied to a coupling fitting having a small diameter (17, 25, 40 mm or the like).

  Furthermore, the coupling fitting of the present invention is not limited to one formed of a metal material, and may be formed of a synthetic resin, various composite materials, or other materials, and any one kind or plural kinds of materials May be formed.

The 1st Embodiment of this invention is shown, (a) is a side view of one coupling metal fitting main body, (b) is the figure seen from the arrow A direction. The embodiment is shown, (a) is a plan view and a side view of the lock lever, (b) a plan view and a side view of the bracket, (c) is a front view, a plan view and a side view of the lock claw. The same embodiment is shown, (a) is a front view in a locked state, (b) is a front view in an unlocked state. The perspective view of the coupling metal fitting without distinction of male and female. Sectional drawing and the side view of the coupling metal fitting of FIG. The side view of the fitting state of the fitting convex part and fitting concave part of the coupling metal fitting of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a, 1b ... Joint metal fitting body, 7 ... Fitting recessed part, 8 ... Fitting convex part, 9 ... Locking hook part, 40 ... Lock lever, 44 ... Lock claw

Claims (6)

A pair of fitting metal bodies, a plurality of fitting protrusions arranged in the circumferential direction of the fitting metal body and projecting in the axial direction, and fitting depressions formed between these fitting protrusions, The fitting projections and fitting recesses of the pair of fittings are fitted together in the axial direction into the fitting depressions and fitting projections of the mating fitting body, and the mating projections are coupled to the fitting projections. In the coupling fitting in which a locking collar portion for locking the pair of coupling fitting main bodies in the axial direction is formed by locking the fitting protrusions of the fitting main body in the circumferential direction to restrict the movement in the axial direction,
It is pivotally supported on at least one peripheral wall of the pair of metal fittings, and is movable between a lock position for locking the pair of metal fittings in a coupled state and a lock releasing position for releasing the coupled state. A lock lever,
Provided on the lock lever, when the lock lever is in the locked position, a convex end surface of the fitting convex portion of the one coupling metal body in a coupled state and a concave end surface of the fitting concave part of the other coupling metal body A lock claw that is inserted between the pair of coupling metal bodies to restrict axial movement of the pair of coupling metal bodies and lock the pair of coupling metal bodies in a coupled state
A coupling fitting characterized by comprising:   The lock lever is composed of a pair of members curved in an arc shape having substantially the same curvature as the curvature of the outer peripheral wall of the coupling metal body, and is joined along the outer circumferential wall of the coupling metal body at the lock position. The coupling fitting according to claim 1, wherein the coupling fitting protrudes radially outward from an outer peripheral wall of the coupling fitting main body at the unlocking position.   The coupling metal fitting according to claim 1, wherein the lock lever is rotatably installed on a side surface of the coupling metal body with a rotation shaft as a fulcrum, and the rotation shaft is supported at both ends.   The lock lever is formed of a pair of members provided in at least one pair on the pair of coupling metal bodies and curved in an arc shape having substantially the same curvature as the curvature of the outer peripheral wall of the coupling metal body. 2. The handle according to claim 1, wherein the handle is joined along an outer peripheral wall of the coupling metal body, and protrudes radially outward from the outer wall of the coupling metal body at the unlocking position. Bonding bracket.   One of the pair of coupling metal bodies is fixedly installed on the equipment, and the lock lever is provided on the coupling metal body that is not fixedly installed on the equipment, and is substantially the same as the curvature of the outer peripheral wall of the coupling metal body. It consists of a pair of members curved in a circular arc shape of curvature, and is joined along the outer peripheral wall of the coupling metal body at the locked position, and in the radial direction from the outer peripheral wall of the coupling metal body at the unlocked position. 2. The coupling fitting according to claim 1, wherein the handle protrudes outward to form a handle.   The coupling metal fitting according to claim 1, wherein the lock lever is temporarily fixed to the temporary fixing device at a lock position.

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