JP4466851B2 - Pipe fitting - Google Patents

Description

  The present invention relates to a pipe joint comprising a male nose and a female body provided with a flow passage portion through which a fluid flows, and avoids erroneous insertion of a nose and a body for different types of fluids. It relates to a possible pipe joint.

  2. Description of the Related Art Conventionally, pipe joints for various pipes for medical use, for example, have different shapes of nose and body depending on the type of fluid so that nose pipes and bodies for different fluids are not erroneously piped. The mechanism for preventing erroneous piping is specified in JIS T7111, and it is essential to incorporate it into medical pipe joints.

  FIGS. 10A to 10C are half-sectional views showing the pipe joints 100, 120, and 140 through which air, oxygen, or laughing gas flows.

  As shown in FIG. 10A, the air pipe joint 100 includes a female body 102 and a female nose 112. A metal annular member 104 is mounted inside the body 102, and a locking ball 108 is held in the opening 106 of the annular member 104. The inner peripheral side of the annular member 104 includes stepped portions 104a, 104b, and 104c that are reduced in diameter in three steps along the insertion direction of the nose 112. On the other hand, the nose 112 is reduced in diameter in three steps along the insertion direction, and includes stepped portions 112a, 112b, and 112c having shapes matching the stepped portions 104a, 104b, and 104c. A groove 114 is formed at a position that matches the ball 108 when the nose 112 is inserted. When the nose 112 is inserted into the body 102, the stepped portions 112 a, 112 b, and 112 c of the nose 112 are inserted to positions that match the stepped portions 104 a, 104 b, and 104 c of the body 102, and the ball 108 is fitted into the groove portion 114. As a result, the nose 112 and the body 102 are coupled.

  As shown in FIG. 10B, in the oxygen pipe joint 120, a metal annular member 124 having a shape different from that for air is attached to the inside of the body 122. The annular member 124 includes step portions 124 a and 124 b that are reduced in diameter in two steps along the insertion direction of the nose 132. On the other hand, the nose 132 is reduced in diameter in two steps along the insertion direction, and includes step portions 132a and 132b having a shape matching the step portions 124a and 124b. When the nose 132 is inserted into the body 122, the step portions 132 a and 132 b of the nose 132 are inserted to a position that matches the step portions 124 a and 124 b of the body 122, and the ball 108 is fitted into the groove portion 114. And body 122 are combined.

  As shown in FIG. 10C, the laughing pipe joint 140 is provided with an annular member 144 having a shape different from that for air and oxygen inside the body 142. The annular member 144 includes stepped portions 144a and 144b that are reduced in diameter in two stages (positions and dimensions different from those for oxygen) along the insertion direction of the nose 132. On the other hand, the nose 152 is provided with stepped portions 152a and 152b having a shape that matches the stepped portions 144a and 144b.

In such pipe joints 100, 120, and 140, even when the oxygen nose 132 and the laughing nose 152 are inserted into the air body 102, the shape of the step portions 104 a, 104 b, and 104 c of the annular member 104 Since they do not match, the ball 108 does not enter the groove 114. Similarly, the air nose 112 and the laughing nose 152 are inserted into the oxygen body 122, and the air nose 112 and the oxygen nose 132 are inserted into the laughing body 142. However, the ball 108 does not enter the groove 114 (see, for example, Patent Document 1).
JP-A-7-301383

  In the pipe joints 100, 120, and 140 shown in FIG. 10, the noses 112, 132, and 152 having different shapes are respectively received by the annular members 104, 124, and 144, which are dedicated parts, so that the noses 112, 132, and 152 of different gases are used. The bodies 122, 142, 162 are configured so as not to be erroneously piped. However, since the pipe joints 100, 120, and 140 are made of metal and are very similar in appearance and cannot be distinguished from each other in color, for example, an oxygen nose 132 may be erroneously inserted into the air body 122. In such a case, even if the nose is pushed all the way into the body, it is not coupled, but it takes time to connect the correct body and nose. In particular, in the case of a patient who needs an emergency, connection work as soon as possible is required. Further, since the metal annular members 104, 124, and 144 are cut products, the processing cost increases.

  The present invention has been made in view of the above problems, and it is an object of the present invention to provide a pipe joint that can easily and surely prevent erroneous insertion of a nose and a body for different fluids and reduce costs. And

  The invention according to claim 1 includes a female body and a male nose, wherein the nose is inserted into the concave insertion portion of the body, and the outer insertion groove formed in the nose is inserted into the concave insertion portion. A pipe joint that is connected to each other when the lock member is fitted, and is inserted into the concave insertion portion of the body and has an opening for holding the lock member; and A resin sleeve that is arranged to be movable inward and moves in the axial direction of the body to allow the lock member to be fitted in the outer groove, and the sleeve is attached to the nose. The outer surface of the tubular body is colored in the same color as the color indication for each type of fluid, and a confirmation hole for visually recognizing the color of the sleeve is formed in the holding member, and at least a part of the confirmation hole is formed. Of the nose It is characterized in that it is exposed to the outside of the body to enter before.

  According to the first aspect of the present invention, the holding member in which the lock member is held in the opening is inserted into the concave insertion portion of the body, and the resin sleeve is movably disposed inside the holding member. ing. This sleeve moves in the axial direction of the body and allows the lock member to fit into the outer groove, and is colored in the same color as the color indication according to the type of fluid attached to the outer surface of the tube of the nose Has been. The holding member has a confirmation hole for visually recognizing the color of the sleeve, and at least a part of the confirmation hole is exposed to the outside of the body before the nose is inserted. As a result, it is possible to insert the nose into the concave insertion portion of the body after visually confirming that the color of the tube attached to the nose and the color of the sleeve visible from the confirmation hole are the same color. Become. For this reason, erroneous insertion of the nose and the body can be prevented, and the correct nose and body can be quickly combined.

  According to a second aspect of the present invention, in the pipe joint according to the first aspect, a stepped portion having a reduced diameter along the insertion direction of the nose is formed inside the sleeve, and the shape of the stepped portion, The outer shape of the nose that matches the shape of the stepped portion is made different for each type of fluid.

  According to the second aspect of the present invention, the stepped portion having a diameter reduced along the insertion direction of the nose is formed inside the sleeve, and the stepped portion has a different shape depending on the type of fluid. For this reason, when the same type of fluid nose is inserted into the body, the outer shape of the nose matches the shape of the stepped portion of the sleeve, and the lock member fits into the outer groove of the nose, and the body and the nose are joined. Is done. On the other hand, when a nose for a different type of fluid is inserted into the concave insertion portion of the body, the outer shape of the nose and the shape of the stepped portion of the sleeve do not match, and the nose cannot be inserted deep into the concave insertion portion. . For this reason, since the outer groove of the nose does not reach the lock member and the lock member does not fit into the outer groove, erroneous piping (misassembled product) can be prevented.

  Further, by making only the shape of the sleeve different depending on the type of fluid, only the sleeve can be used as a dedicated part, and the constituent parts of the body can be shared, so that the cost can be reduced. In addition, since a resin sleeve is used, processing and material costs can be reduced compared to metal.

  According to a third aspect of the present invention, in the pipe joint according to the first or second aspect, the lock member is made of a ball, the opening has a circular shape into which the ball can be inserted, and the confirmation hole has The shape is larger than the opening.

  According to the third aspect of the present invention, the ball is held in the circular opening of the holding member, and the confirmation hole of the holding member is larger than the opening. For this reason, it becomes easy to visually recognize the color of the sleeve from the confirmation hole, and when the nose is inserted into the body, the color can be easily confirmed, and erroneous piping can be prevented more reliably.

  Since the pipe joint according to the present invention can confirm that the color of the sleeve and the color indication of the nose are the same color by the confirmation hole, it is possible to prevent the nose for different fluids from being erroneously inserted into the body, Correct piping can be performed quickly. Further, by making the shape of only the sleeve different depending on the type of fluid, it is possible to share the components of the body other than the sleeve, and to reduce the cost.

  Hereinafter, the best embodiment of the pipe joint of the present invention will be described with reference to the drawings.

  FIG. 1A is a half cut sectional view showing a separated state of an air pipe joint 10 according to an embodiment of the present invention, and FIG. 2A is a half cut section showing a coupled state of the pipe joint 10. FIG. In the half cut sectional view, only the cross sections of the holding member 16, the sleeve 22, and the nose 40, which will be described later, are hatched in order to facilitate understanding of the configuration of the present invention.

  The air pipe joint 10 is composed of a body 12 that is a female metal fitting and a nose 40 that is a male metal fitting. A collar 32 for connecting the body 12 and the nose 40 is extrapolated on the outer peripheral surface of the body 12.

  As shown in FIG. 1A, the body 12 has a concave insertion portion 14 into which the nose 40 is inserted. A holding member 16 is mounted on the insertion port side of the concave insertion portion 14 so as to protrude from the body main body 13. As shown in FIGS. 1B and 1C, the holding member 16 is formed of a ring-shaped member, and includes three circular openings 16a and three circular confirmation holes 16c having a larger size. Are alternately formed in the circumferential direction. As shown in FIG. 1A, a lock ball 18 is accommodated in each of the three openings 16a. Further, the ball 18 is held by the collar 32 so as not to be detached. In addition, a protrusion 17 that can be engaged with the recess 32 b of the collar 32 is formed at the distal end (insertion side) of the holding member 16.

  A sleeve 22 is inserted inside the holding member 16 as shown in FIG. The sleeve 22 is made of a synthetic resin such as polybutylene terephthalate and is colored yellow (Y). As shown in FIG. 1D, a part of the confirmation hole 16c of the holding member 16 protrudes from the collar 32 and is exposed to the outside, and the yellow sleeve 22 is visible from the confirmation hole 16c. Further, as shown in FIG. 1A, the outer peripheral surfaces of the hose 44 (only the nose is shown) respectively attached to the body 12 and the nose 40 are also colored yellow.

  As shown in FIG. 1A, a reduced diameter portion 16b is formed on the back side of the holding member 16, and the spring 22 is inserted between the sleeve 22 and the reduced diameter portion 16b, whereby the sleeve 22 is It can move in the insertion direction of the concave insertion portion 14.

  In addition, two O-rings 24, 24 that seal the nose 40 are held by the locking rings 26, 26 in the concave insertion portion 14 on the back side of the holding member 16. Further, a moving member 28 is elastically attached to the inner side of the locking rings 26 and 26 via a spring 30 so as to be movable.

  Inside the collar 32, a step portion 13 a is formed on the outer peripheral surface of the body main body 13, and a spring 34 is fitted on the step portion 13 a. A step portion 32a is formed on the inner peripheral side of the collar 32 so as to face the step portion 13a. The collar 32 is fitted into the body main body 13, and the spring 34 is pressed by the step portion 32a. The collar 32 is prevented from coming off by the ball 18 in contact with the concave portion 32 b of the collar 32.

  As shown in FIG. 2B, the inner peripheral surface of the sleeve 22 is reduced in diameter in the insertion direction back side of the nose 40 to form step portions 22a and 22b. An inclined surface 22 c is formed on the insertion port side of the sleeve 22.

  As shown in FIGS. 1 (A) and 2 (C), the nose 40 has a diameter that is gradually reduced at the front end side of the outer peripheral surface, and a shape that matches the stepped portions 22a and 22b and the inclined surface 22c of the sleeve 22. Step portions 40a and 40b and an inclined surface 40c are formed. A groove 41 into which the ball 18 is fitted is formed on the outer peripheral surface of the nose 40.

  Next, the oxygen pipe joint 50 will be described with reference to FIGS.

  In addition, the same code | symbol is attached | subjected to the member same as the pipe joint 10 for air, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 4A, in the oxygen pipe joint 50, a sleeve 54 having a shape different from that of the air sleeve 22 is inserted inside the holding member 16 of the body 52. That is, in the body 12 for air and the body 52 for oxygen, the component parts of the body main body 13 are made common, and only the sleeves 22 and 54 are different parts. That is, as shown in FIGS. 4B and 4C, the holding member 16 is shared.

  As shown in FIG. 5B, the sleeve 54 is made of synthetic resin and colored green (G). As shown in FIG. 4D, a part of the confirmation hole 16c of the holding member 16 protrudes from the collar 32 and is exposed to the outside, and the green sleeve 54 can be seen from the confirmation hole 16c. As shown in FIG. 4A, the outer peripheral surfaces of the hose 64 (only the nose is shown) attached to the body 52 and the nose 60 are also colored in green.

  As shown in FIG. 5B, the inner peripheral surface of the sleeve 54 is reduced in diameter in the insertion direction back side of the nose 60 to form step portions 54a and 54b. An inclined surface 54 c is formed on the insertion port side of the sleeve 54. The step portions 54a and 54b have larger step sizes and different shapes compared to the air sleeve 22 shown in FIG.

  As shown in FIGS. 4 (A) and 5 (C), the nose 60 has a diameter that is gradually reduced at the tip end of the outer peripheral surface, and a shape that matches the step portions 54a and 54b and the inclined surface 54c of the sleeve 54. Step portions 60a and 60b and an inclined surface 60c are formed.

  Next, the laughing pipe joint 70 will be described with reference to FIGS.

  In addition, the same code | symbol is attached | subjected to the member same as the pipe joint 10 for air, and the pipe joint 50 for oxygen, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 7A, in the laughing gas pipe joint 70, a sleeve 74 having a shape different from the sleeve 22 for air and the sleeve 54 for oxygen is inserted inside the holding member 16 of the body 72. ing. In the air body 12, the oxygen body 52, and the laughing body 72, the constituent parts of the body main body 13 are shared, and only the sleeves 22, 54, and 74 are different parts. That is, as shown in FIGS. 7B and 7C, the holding member 16 is shared.

  As shown in FIG. 8B, the sleeve 74 is made of a synthetic resin and is colored blue (B). As shown in FIG. 7D, a part of the confirmation hole 16c of the holding member 16 protrudes from the collar 32 and is exposed to the outside, and the blue sleeve 74 can be seen from the confirmation hole 16c. Further, as shown in FIG. 7A, the outer peripheral surfaces of the hose 84 (only the nose is shown) respectively attached to the body 72 and the nose 80 are also colored in blue.

  As shown in FIG. 8B, a planar inner peripheral portion 74a is formed inside the sleeve 74, and no stepped portion is formed. The insertion port side of the inner peripheral portion 74a is an inclined surface 74b. As shown in FIGS. 7 (A) and 8 (C), the nose 80 has a diameter that is gradually reduced at the distal end side of the outer peripheral surface, and has a shape that matches the inner peripheral portion 74a and the inclined surface 74b of the sleeve 74. A stepped portion 80a and an inclined surface 80b are formed.

  Next, operations of the air pipe joint 10, the oxygen pipe joint 50, and the laughing pipe joint 70 will be described.

  As shown in FIGS. 1 (A) and 1 (D), when the nose 40 of the air pipe joint 10 and the body 12 are joined, the color of the outer peripheral surface of the hose 44 of the nose 40 and the confirmation hole of the body 12 It is confirmed that the color of the sleeve 22 visible from 16c is the same yellow. As shown in FIG. 3A, when the nose 40 is inserted into the concave insertion portion 14, the stepped portions 40a and 40b and the inclined surface 40c of the nose 40 are aligned with the stepped portions 22a and 22b and the inclined surface 22c of the sleeve 22. Abut. Then, as shown in FIG. 3B, the nose 40 presses the sleeve 22 against the urging force of the spring 20, and the nose 40 is inserted into the concave insertion portion 14 together with the sleeve 22.

  As shown in FIG. 2A, when the nose 40 reaches the back side of the concave insertion portion 14, the ball 18 is fitted into the groove portion 41 of the nose 40. In this state, the collar 32 is moved by the urging force of the spring 34, the concave portion 32 b is engaged with the protruding portion 17 of the holding member 16, and the ball 18 is pressed by the inner peripheral surface of the collar 32, whereby the body 12. And nose 40 are connected. The nose 40 is sealed by the O-rings 24, 24 of the body 12.

  On the other hand, when separating the nose 40 and the body 12, the collar 18 is moved in the direction of arrow A so that the ball 18 can move freely in the recess 32 b, and the nose 40 is pulled out from the concave insertion portion 14. Can do.

  4A and 4D, when the nose 60 of the oxygen pipe joint 50 and the body 52 are joined, the color of the outer peripheral surface of the hose 64 of the nose 60 and the confirmation hole of the body 52 Confirm that the color of the sleeve 54 visible from 16c is the same green. Then, as shown in FIG. 6A, the nose 60 is inserted into the concave insertion portion 14. When the nose 60 is inserted, the step portions 60a and 60b and the inclined surface 60c of the nose 60 are brought into contact with and in contact with the step portions 54a and 54b and the inclined surface 54c of the sleeve 54. As shown in FIG. 6B, when the nose 60 is further inserted, the sleeve 54 is pushed against the urging force of the spring 20. As shown in FIG. 5A, when the nose 60 reaches the back side of the concave insertion portion 14, the ball 18 is fitted into the groove portion 41 of the nose 60, and the ball 18 is put on the inner peripheral surface of the collar 32. By pressing, the body 52 and the nose 60 are connected.

  7A and 7D, when the nose 80 of the laughing pipe joint 70 and the body 72 are joined, the color of the outer peripheral surface of the hose 84 of the nose 80 and the confirmation of the body 72 It is confirmed that the color of the sleeve 74 seen from the hole 16c is the same blue. Then, as shown in FIG. 9A, the nose 80 is inserted into the concave insertion portion 14. When the nose 80 is inserted, the stepped portion 80a and the inclined surface 80b of the nose 80 are in contact with the inner peripheral portion 74a and the inclined surface 74b of the sleeve 74. As shown in FIG. 9B, when the nose 80 is further inserted, the sleeve 74 is pushed against the urging force of the spring 20. As shown in FIG. 8A, when the nose 80 reaches the back side of the concave insertion portion 14, the ball 18 is fitted into the groove portion 41 of the nose 80, and the ball 18 is put on the inner peripheral surface of the collar 32. By pressing, the body 72 and the nose 80 are connected.

  In the pipe joint 10 for air, the pipe joint 50 for oxygen, and the pipe joint 70 for laughing gas, the sleeve 22, the sleeve 54, and the sleeve 74 are made of synthetic resin and are colored yellow, green, and blue, respectively. Thus, the colors of the sleeves 22, 54, 74 can be visually recognized from the confirmation holes 16c of the bodies 12, 52, 72. Further, since the confirmation hole 16c is larger than the opening 16a in which the ball 18 is held, the color of the sleeves 22.54, 74 can be easily seen from the outside of the bodies 12, 52, 72. As a result, when connecting the body 12 and the nose 40, the body 52 and the nose 60, and the body 72 and the nose 80, it is confirmed that the colors of the hoses 44, 64, 84 and the sleeves 22, 54, 74 are the same color. In addition, the noses 40, 60, and 80 can be inserted, so that erroneous insertion can be reliably prevented and correct piping can be performed quickly.

  Further, even if different gas noses 40, 60, 80 are erroneously inserted into different gas bodies 12, 52, 72, the outer peripheral shape of the nose 40, 60, 80 and the sleeves 22, 54, 74 Since the peripheral shape does not match, the noses 40, 60, and 80 cannot be inserted all the way. For example, if the oxygen nose 60 is mistakenly inserted into the air body 12, the stepped portions 60 a and 60 b of the nose 60 do not match the stepped portions 22 a and 22 b of the sleeve 22. Cannot be pushed all the way in. For this reason, the ball 18 is not locked by the groove 41 and the nose 60 and the body 12 are not connected.

  In addition, the body 12, 52, 72 has only the sleeves 22, 54, 74 as dedicated parts, and other components are made common, so that the cost of parts can be reduced and the assembly of the pipe joint becomes easy. .

It is a half cut sectional view which shows the separation state of the pipe joint for air concerning one embodiment of the present invention, a sectional view of a holding member, a side view of a holding member, and a partial side view of a pipe joint. It is a half-cut sectional view showing the combined state, sleeve and nose of a pipe joint for air according to an embodiment of the present invention. It is a half-cut sectional view which shows the operation | movement which couple | bonds the body and nose of the pipe joint for air concerning one Embodiment of this invention. It is a half cut sectional view which shows the separation state of the pipe joint for oxygen concerning one embodiment of the present invention, a sectional view of a holding member, a side view of a holding member, and a partial side view of a pipe joint. It is a half-cut sectional view showing the combined state, sleeve, and nose of the pipe joint for oxygen concerning one embodiment of the present invention. It is a half-cut sectional view which shows the operation | movement which couple | bonds the body and nose of the pipe joint for oxygen which concern on one Embodiment of this invention. It is a half cut sectional view which shows the separation state of the pipe joint for laughter concerning one embodiment of the present invention, a sectional view of a holding member, a side view of a holding member, and a partial side view of a pipe joint. It is a half cut sectional view showing the combined state, sleeve, and nose of the pipe joint for laughter concerning one embodiment of the present invention. It is a half-cut sectional view which shows the operation | movement which couple | bonds the body and nose of the pipe joint for laughter concerning one Embodiment of this invention. It is a half-cut sectional view showing a conventional pipe joint for air, a pipe joint for oxygen, and a pipe joint for laughing air.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pipe joint 12 Body 13 Body main body 13a Step part 14 Concave insertion part 16a Opening hole 16c Confirmation hole 16 Holding member 18 Ball 20 Spring 22 Sleeve 22a, 22b Step part 22c Inclined surface 32 Collar 40 Nose 40a, 40b Step part 40c Inclined surface 41 Groove 44 Hose (Tube)
50 pipe joint 52 body 54 sleeve 54a, 54b stepped portion 54c inclined surface 60 nose 60a, 60b stepped portion 60c inclined surface 64 hose (tube)
70 Pipe Joint 72 Body 74 Sleeve 74b Inclined Surface 74a Inner Perimeter 80 Nose 80a Stepped Part 80b Inclined Surface 84 Hose (Tube)

Claims (3)

The body is composed of a female body and a male nose, the nose is inserted into the concave insertion portion of the body, and the lock member inserted into the concave insertion portion is fitted into the outer groove formed in the nose. A pipe joint that is joined by
A holding member having an opening inserted into the concave insertion portion of the body and holding the lock member;
A resin sleeve that is movably disposed inside the holding member and moves in the axial direction of the body to allow the lock member to fit into the outer groove;
The sleeve is colored in the same color as the color display according to the type of fluid attached to the outer surface of the tube attached to the nose,
A confirmation hole for visually recognizing the color of the sleeve is formed in the holding member, and at least a part of the confirmation hole is exposed to the outside of the body before insertion of the nose. .   A stepped portion reduced in diameter along the insertion direction of the nose is formed inside the sleeve, and the shape of the stepped portion and the outer shape of the nose that matches the shape of the stepped portion are classified according to the type of fluid. The pipe joint according to claim 1, wherein the pipe joint is made different. The locking member is a ball, and the opening has a circular shape into which the ball can be inserted;
The pipe joint according to claim 1 or 2, wherein the confirmation hole has a shape larger than the opening.

Images