JP2011140989A - Hose joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hose joint for easily and quickly connecting a hose, and improvable in terms of cost by simplifying a structure. <P>SOLUTION: This hose joint is composed of a cylindrical inserting member 2, a receiving member 4 for arranging a socket part 3 in a tip part, and an operation ring 5 rotatably fitted around a midway position on the outside of the inserting member 2. The operation ring 5 is provided with a projection part 10 for arranging a locking projection 11 on the inner surface side, and the outer periphery of the socket part 3 is provided with a projection strip 17 for holding a connecting state of the inserting member 2 sand the receiving member 4 by engagement of the locking projection 11 by rotating the operation ring 5 in an entering position in the axial direction of the locking projection 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a hose joint used to connect fire hoses to each other, for example.

  Fire hoses are limited in length for handling, so it is necessary to connect multiple hoses in order to obtain the required length during use. In this case, use hose joints to connect the hoses. become.

  Conventionally, generally used joints for fire fighting hoses are roughly classified into threaded joints and plug-in joints.

  The former threaded joint is provided with a male screw for connection on the outer periphery of the front end, a cylindrical insertion fitting whose rear end is a connection part of the hose, and the insertion fitting can be rotated and moved in the axial direction. A fastening fitting that is externally fitted, and a female fitting that is externally fitted in a retaining shape so that a female screw member that is screwed into the male screw at the tip can be rotated and moved in the axial direction, and a rear fitting that serves as a hose connecting portion; The female screw member and the male screw are screwed together, and the fastening metal fitting is screwed into the male screw and brought into contact with the female screw member, so that the insertion fitting and the receiving metal fitting are coupled coaxially ( For example, see Patent Document 1).

  In addition, the latter plug-in joint is provided with a receiving portion at the front end and a hose connecting portion at the rear end, and a plurality of engaging claws are incorporated in the inner periphery of the receiving portion so as to be movable in the radial direction. A cylindrical receiving metal member that is urged inwardly by a spring to the joint claw, and an engagement step part that engages the engagement claw in a retaining manner by being inserted into the receiving part on the outer periphery of the tip part; A hose connecting part is provided at the rear end, and it is composed of a cylindrical insertion fitting with an engagement release ring fitted to the outside so as to be movable in the axial direction, and the tip of the insertion fitting is inserted into the receiving part. In addition, the receiving metal fitting and the insertion metal fitting are coaxially coupled by engaging the engaging claw and the engaging step portion, and the coupling is released by pushing the engagement releasing ring into the receiving portion to immerse the engaging claw. (For example, refer to Patent Document 2).

JP-A-8-277975 JP 2008-142301 A

  By the way, in the former threaded joint, when connecting and disconnecting, it is necessary to rotate the female thread member and the fastening bracket to screw and remove the male thread. It is not suitable for connecting fire hoses that require quick connection on site.

  In addition, since the latter plug-in joint can be connected simply by inserting the insertion fitting into the receiving portion of the receiving fitting, there is an advantage that quick connection at the fire site is possible. Since it is necessary to incorporate a joint claw and a spring for urging elasticity, there is a problem that the structure becomes complicated and the cost becomes expensive.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a hose joint that can be connected to a hose simply and quickly with one touch, and at the same time, can be improved in terms of cost by simplifying the structure.

  In order to solve the above-described problems, the present invention is provided with a cylindrical insertion member whose rear end side is a hose connection portion, and a socket portion with an inner diameter that fits the front end side of the insertion member at the front end portion. A cylindrical receiving member that becomes a hose connecting portion and an operation ring that is externally fitted so as to be able to rotate to a midway position outside the insertion member. The operation ring is connected to the distal end side of the insertion member. A protrusion with a locking projection provided on the inner surface of the socket is located outside the outer periphery of the socket in a state of being inserted into the socket, and the locking projection is inserted into the outer periphery of the socket in the axial direction. By allowing the operation ring to rotate at the entry position, the socket portion and the operation ring are coupled in the axial direction by the engagement of the locking projection, and a protrusion is provided to hold the connection state of the insertion member and the receiving member Things .

  Here, the operation ring that is externally fitted to the insertion member can be rotated between the protrusion provided around the front end of the insertion member on the outer peripheral surface of the insertion member and the stop ring fitted to the rear end. The tip end side is opened in the shape of a ring having an inner diameter that is externally fitted to the protrusion, and the rear end side is a rear end wall that matches the outer diameter of the insertion member.

  The projecting portion provided on the operation ring has a cylindrical shape with an opening having an inner diameter larger than the outer diameter of the operation ring, and a plurality of locking projections are disposed in the circumferential direction at positions closer to the tip on the inner circumferential surface thereof. Are provided at equal intervals.

  In addition, the tip side of the receiving member has a two-stage stepped structure in which an enlarged diameter portion having an inner diameter where the distal end of the insertion member just fits and a larger diameter portion having an inner diameter larger than the enlarged diameter portion are connected. The rear end of the annular socket portion is fixed to the large-diameter portion by screwing, and a sealing material is incorporated into the inner periphery of the rear end side of the socket portion so as to seal the outer peripheral surface of the insertion member inserted into the receiving member. ing.

  The socket portion has an inner diameter into which the insertion member can be inserted and an outer diameter that fits into the protruding portion of the operation ring, and the same number of protrusions as the locking protrusions are provided on the distal end side of the outer peripheral surface. ing.

  The above-mentioned protrusion is provided intermittently long in the circumferential direction of the outer surface of the socket part, and between the ends of the adjacent protrusions becomes a part without a protrusion, and becomes an insertion / removal part for taking in and out the locking protrusion in the axial direction. When the operating ring is rotated in one direction with the protruding portion of the operating ring fitted to the socket portion, the operating projection is pulled toward the receiving member by engaging the locking protrusion with the protrusion, thereby The insertion member and the receiving member are connected.

  According to the present invention, in the state in which the distal end side of the insertion member is inserted into the socket portion of the member, the operation ring externally fitted to the insertion member is rotated at the position advanced in the axial direction, thereby Since the connection state of the insertion member and the receiving member is maintained by the engagement of the protrusion, the connection and separation of the hose can be performed by a one-touch operation that moves and rotates the operation ring in the axial direction, and the connection and separation are quick. In particular, it is suitable for connecting fire hoses on fire sites.

  In addition, since an operating ring is externally fitted to the insertion member, and a protrusion is provided on the locking ring and the socket portion of the receiving member on the operating ring, it is possible to improve the price by simplifying the structure. it can.

Exploded perspective view of hose coupling according to the present invention The perspective view which decomposed | disassembled the socket part which shows a receiving member The perspective view which decomposed | disassembled the operation ring which shows an insertion member The longitudinal front view which shows the connection state of the hose coupling which concerns on this invention FIG. 5 is a longitudinal side view taken along arrow V-V in FIG. 4, (a) is a longitudinal side view showing a state before coupling in which the operation ring is fitted on the socket part, and (b) is an operation ring fitted on the socket part. Vertical side view showing the connected state (A) is a perspective view of a hose joint corresponding to FIG. 5 (a) showing a state before coupling in which the operation ring is externally fitted to the socket part, and (b) shows a coupling state in which the operation ring is externally fitted to the socket part. The principal part perspective view of the hose coupling corresponding to FIG.5 (b)

  Hereinafter, embodiments of the present invention will be described based on illustrated examples.

  As shown in FIG. 1 to FIG. 4, the hose joint 1 includes a cylindrical insertion member 2, a receiving member 4 provided with a socket portion 3 having an inner diameter that fits the distal end side of the insertion member 2 at the distal end, The operation ring 5 is fitted on the outside of the insertion member 2 so as to be rotatable at an intermediate position, and can be connected and disconnected by moving the operation ring 5 in the axial direction and rotating it. Yes. Here, in each member, the front end refers to an end portion on the connection side of the insertion member 2 and the receiving member 4, and the rear end refers to the connection side of the hose.

  The insertion member 2 has a cylindrical shape with a straight inner diameter whose rear end side is the hose connection portion 2a. The outer circumferential surface of the insertion member 2 has a ridge 6 at a position slightly closer to the tip, and is closer to the rear end than the ridge 6. The operation ring 5 which is provided with a recessed groove 8 into which the stop ring 7 is fitted at a position and is externally fitted at a position outside the insertion member 2 is rotated between the protrusion 6 and the stop ring 7. It is held in a retaining state that enables axial movement.

  The operating ring 5 includes a cylindrical portion 5a having an inner diameter that fits the outer diameter of the protrusion 6, and a rear end wall 5b having an inner diameter that is bent from the rear end of the cylindrical portion 5a toward the inner diameter side and fits the insertion member 2. The rear end wall 5b is placed between the annular protrusion 2b provided near the tip on the outer periphery of the insertion member 2 and the stop ring 7 fitted at a position closer to the rear end than this, The operation ring 5 is held so as to be rotatable with respect to the insertion member 2.

  A projecting portion 10 having an inner diameter larger than the outer diameter of the socket portion 3 provided on the receiving member 4 is provided on the distal end side of the cylindrical portion 5a in the operation ring 5 so as to project toward the distal end side. A plurality of locking projections 11 are provided at equal intervals in the circumferential direction at a position closer to the tip on the inner surface side of the protruding portion 10.

  In the case of the illustration, the protrusion 10 is formed in a cylindrical shape, and an example is shown in which square locking protrusions 11 are projected on three positions on the inner peripheral surface thereof, but the locking protrusions 11 are located at two positions. The projecting portion 10 is not limited to a cylindrical shape, but is provided by an arm partially projecting only at a position where the locking projection 11 is to be provided on the distal end side of the cylindrical portion 5a. You may make it form.

  The receiving member 4 is formed in a straight cylindrical shape having an inner diameter equal to that of the insertion member 2, and a distal end side thereof is an enlarged diameter portion 12 having an inner diameter in which the distal end of the insertion member 2 just fits, and is larger than the enlarged diameter portion 12. It has a two-stage stepped structure in which a large-diameter portion 13 that is the inner diameter of the diameter is connected. The rear end of the annular socket portion 3 is fixed to the large-diameter portion 13 by screwing, and the rear end of the receiving member 4 The side is a hose connection portion 14.

  The socket portion 3 is formed in a cylindrical shape having an outer diameter that fits inside the protruding portion 10 and an inner diameter that fits outside the protrusion 6, and the rear end side is screwed and fixed to the large diameter portion 13. It is the arrangement | positioning which protrudes from the large diameter part 13 to the front.

  In the space formed between the annular projection 15 provided around the inner diameter of the inner periphery of the socket portion 3 at the intermediate position and the inner end surface of the large diameter portion 13, and the inner end surface of the insertion member 2. A sealing material 16 is incorporated which is in close contact with the outer periphery of the insertion member 2 inserted into the socket portion 3 of the receiving member 4 and makes the fitting portion between the insertion member 2 and the receiving member 4 watertight.

  By allowing the locking projection 11 to enter the outer periphery of the socket portion 3 in the axial direction and rotating the operation ring 5 at the entry position, the socket portion 3 and the operation ring 5 are engaged by the engagement of the locking projection 11. Are provided in the axial direction, and a protrusion 17 is provided for maintaining the connection state of the insertion member 2 and the receiving member 4.

  The protrusions 17 are long along the circumferential direction at the tip of the outer periphery of the socket portion 3, have a height at which the inner diameter of the protruding portion 10 just fits, and the number equal to the locking protrusion 11 is intermittent. Between the ends of the adjacent ridges 17 are portions where the ridges 17 are not provided, thereby providing an insertion / removal portion 18 for inserting / removing the locking projections 11 in the axial direction. When the operating ring 5 is rotated in one direction with the protruding portion 10 of the outer ring 10 fitted, the operating ring 5 is pulled toward the receiving member 4 by engaging the locking protrusion 11 with the protrusion 17, As a result, the insertion member 2 and the receiving member 4 are connected by pulling each other.

  In the case of illustration, the locking protrusion 11 that is located on one side of the insertion / removal portion 18 and is located on the one side of the insertion / removal portion 18 on the outer side of the protrusion 17 on the outer periphery of the socket portion 3 on one side. A stopper projection 19 for preventing rotation and a rotation stopper 20 for the locking projection 11 engaged with the projection 17 are provided at a position corresponding to the intermediate portion of the projection 17. If the operating ring 5 with the locking projection 11 entered is rotated to the opposite side of the stopper projection 19, the locking projection 11 engages with the protrusion 17 and the locking projection 11 contacts the rotation stopper 20. Connection is completed at the contact point.

  In the illustrated case, the socket portion 3 is a separate member with respect to the receiving member 4. However, the socket portion 3 may be formed integrally with the large-diameter portion 13 of the receiving member 4. Moreover, although the recessed part 17a was formed in the intermediate part of the protrusion 17, and the latching protrusion 11 contact | abutted to the rotation stopper 20 fits in this recessed part 17a, the width | variety along the axial direction of the protrusion 17 is made. The operation ring 5 rotated in the locking direction may be formed so as to be drawn in the axial direction by providing an inclination that is narrow toward the loading / unloading portion 18 and widens toward the rotation stopper 20.

  The hose coupling 1 according to the present invention has the above-described configuration, and connects the end of one fire hose a to the hose connection portion 2a formed on the rear end side of the insertion member 2, and the rear end side of the receiving member 4 The end portion of the other fire hose b is connected to the hose connection portion 14 formed in the above.

  In order to connect both hoses a and b, the front end side of the insertion member 2 is fully inserted into the socket portion 3 of the receiving member 4, and the locking projection 11 and the socket of the operation ring 5 attached in the middle of the insertion member 2 The operation ring 5 is pushed in the axial direction with the phase of the loading / unloading portion 18 formed between the ridges 17 on the outer periphery of the portion 3 in the axial direction, so that the locking projection 11 enters the loading / unloading portion 18 and is operated at this pushing position. When the ring 5 is rotated toward the opposite side of the stopper protrusion 19 as indicated by the arrows in FIGS. 5a and 6a, the locking protrusion 11 engages with the protrusion 17 in the retaining direction, and the insertion member 2 And the receiving member 4 are attracted to each other, and if the hand is released from the operation ring 5 at a position where it abuts against the rotation stopper 20, the insertion member 2 and the receiving member 4 are prevented from coming off as shown in FIGS. 5b and 6b. Combined in FIG. In Suyo, in a connected state of the two fire hose a and b.

  At this time, the annular sealing material 16 provided on the inner periphery of the socket portion 3 is in close contact with the outer periphery of the distal end portion of the insertion member 2, so that the watertightness of the connection portion between the insertion member 2 and the receiving member 4 is maintained and the locking protrusion 11 is elastically held in the recess 17a, so that the operation ring 5 does not rotate naturally, and the connection state between the fire fighting hoses a and b can be maintained.

  Next, when disconnecting both the fire hoses a and b, the operation ring 5 is pushed in the axial direction, and the operation projection 5 is detached from the recess 17a. On the contrary, the locking projection 11 is positioned at the insertion / removal portion 18 in a state where the locking projection 11 is rotated to the stopper projection 19 and the locking projection 11 is in contact with the stopper projection 19. It is only necessary to pull the member 4 apart. At the same time that the locking projection 11 is pulled out of the socket portion 3 through the insertion / removal portion 18, the insertion member 2 is pulled out of the socket portion 3. Will be disconnected.

DESCRIPTION OF SYMBOLS 1 Hose coupling 2 Insertion member 3 Socket part 4 Receiving member 5 Operation ring 6 Projection 7 Stop ring 8 Concave groove 10 Projection part 11 Locking projection 12 Large diameter part 13 Large diameter part 14 Hose connection part 15 Annular projection 16 Seal material 17 Projection 18 Inserting / unloading part 19 Stopper projection 20 Stopper stopper

Claims (1)

  A cylindrical insertion member whose rear end side is a hose connection part, a socket part with an inner diameter that fits the front end side of the insertion member at the front end part, and a cylindrical receiving member whose rear end side is a hose connection part; An operation ring that is externally fitted so as to be rotatable at a position on the outer side of the insertion member. In the outer periphery of the socket portion, the operation ring is inserted into the socket portion of the receiving member at the distal end side of the insertion member. Protruding portions are provided on the outside and provided with locking projections on the inner surface side thereof, allowing the locking projections to enter the outer periphery of the socket portion in the axial direction, and rotating the operation ring at the entering position. Accordingly, the hose joint is provided with a protrusion that connects the socket portion and the operation ring in the axial direction by engagement of the locking protrusion and maintains the connection state of the insertion member and the receiving member.

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