JP2012149700A - In-core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an in-core that can be taken out from the inside of a pipe joint.SOLUTION: A flange 60 is deformed inward when the flange 60 of the in-core 56 touches seal parts 32, 36 when taking out the in-core 56 from the pipe joint 10. Consequently, the in-core 56 having remained in the pipe joint 10 can be taken out.

Description

  The present invention relates to an incore attached to a distal end portion of a tubular body.

  Examples of the pipe joint to which the pipe body is connected include one in which the pipe body is inserted while the outer peripheral surface is in contact with the inner peripheral face of an O-ring built in the pipe joint, and the pipe body is detachably connected.

  When inserting a pipe body into such a pipe joint, there is a concern that the front end of the pipe body hits the O-ring and the O-ring is damaged or dropped. In Patent Document 1, a resin sleeve provided with an umbrella is attached to the tip of the metal tube, and the tip of the metal tube is covered with the umbrella, so that the O-ring built in the tube joint is not damaged. A technique for inserting and connecting metal tubes is disclosed.

  However, when the pipe body connected to the pipe joint with the in-core such as the resin sleeve attached to the tip is pulled out from the pipe joint and removed, for example, the tip of the in-core (the resin sleeve of Patent Document 1) is removed. In this case, it is conceivable that the in-core remains in the pipe joint when the outer peripheral portion of the umbrella portion contacts the O-ring. And it is difficult to take out the in-core remaining in the pipe joint in this way, and a tool or the like is required.

JP 2006-161891 A

  This invention considers the fact concerned, and makes it a subject to provide the in-core which can be taken out from the inside of a pipe joint.

  The invention according to claim 1 is an in-core that is attached to a tubular body that is inserted into the tubular joint in contact with an annular seal member built in the tubular joint at the position of the distal end of the tubular body. An insertion portion to be inserted into the tubular body, an annular flange portion provided at an end portion of the insertion portion and covering an end surface of the tubular body when the insertion portion is inserted into the tubular body, and a distal end of the flange portion An in-core having a chamfered portion formed on an outer edge and a deformation mechanism for deforming the flange portion in contact with the seal member inward when the insertion portion is pulled out from the pipe joint.

  According to the first aspect of the present invention, when the pipe body is inserted into the pipe joint, the ring-shaped seal built in the pipe joint is a chamfered portion formed in the flange portion of the in-core attached to the distal end portion of the pipe body. Since it contacts the member, it is possible to prevent the seal member from being damaged or dropped out by inserting the tube body into the pipe joint.

  In addition, if the collar comes into contact with the seal member when the insertion part is pulled out from the pipe joint, the collar deforms inward so that the incore remaining in the pipe joint when the pipe body is pulled out and removed is taken out. be able to.

  According to a second aspect of the present invention, the deformation mechanism is an annular groove formed along at least one of the outer peripheral surface of the end portion of the insertion portion and the rear surface of the flange portion along the outer periphery of the insertion portion.

  In the invention according to claim 2, by forming an annular groove along the outer periphery of the insertion portion on at least one of the outer peripheral surface of the end portion of the insertion portion and the back surface of the flange portion, at least one of the insertion portion and the flange portion is formed. Partially reduce the rigidity. As a result, when the collar comes into contact with the seal member when the insertion part is pulled out from the pipe joint, the collar can be deformed inward. Further, the deformation mechanism can be formed by simple processing.

  According to a third aspect of the present invention, the deformation mechanism is a slit in the material axis direction of the flange portion formed in the flange portion.

  In the invention according to claim 3, the rigidity of the collar portion is reduced by forming the slit in the material axis direction of the collar portion in the collar portion. As a result, when the collar comes into contact with the seal member when the insertion part is pulled out from the pipe joint, the collar can be deformed inward.

  Since this invention set it as the said structure, the incore which can be taken out from the inside of a pipe joint can be provided.

It is a sectional side view which shows the pipe joint which concerns on the 1st Embodiment of this invention. It is a perspective view showing an in core concerning a 1st embodiment of the present invention. It is a side view which shows the incore which concerns on the 1st Embodiment of this invention. It is a rear view which shows the in-core which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the condition where a pipe body is inserted in the pipe joint which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the conventional problem at the time of a pipe body being inserted in a pipe joint. It is explanatory drawing which shows the condition where the pipe body was inserted in the pipe joint which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the condition where the pipe body was pulled out from the pipe joint which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the effect | action of the in-core which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the incore which concerns on the 2nd Embodiment of this invention. It is a side view which shows the in-core which concerns on the 2nd Embodiment of this invention. It is a front view which shows the in-core which concerns on the 2nd Embodiment of this invention. It is a side view which shows the modification of the in-core which concerns on embodiment of this invention. It is a rear view which shows the modification of the in-core which concerns on embodiment of this invention. It is a side view which shows the modification of the in-core which concerns on embodiment of this invention.

  The in-core of the present invention will be described with reference to the drawings. First, a first embodiment of the present invention will be described.

  The side sectional view of FIG. 1 shows a state before the metal pipe 12 as a pipe body is connected to the metal pipe 14 using the pipe joint 10. The joint body 16 made of metal or resin constituting the pipe joint 10 is a cylindrical member having a columnar hollow portion 18.

  A cylindrical connection portion 20 is projected from one end portion of the joint body 16 (the end portion on the side connected to the metal tube 14), and a male screw 22 is formed on the outer peripheral surface of the connection portion 20. Yes. An annular cap member 24 is attached to the other end of the joint body 16 (the end on the side connected to the metal tube 12).

  The cap member 24 is screwed to a male screw 26 formed on the outer peripheral surface of the other end portion of the joint body 16, and turns the cap member 24 clockwise with respect to the material axis of the joint body 16 (hereinafter, “cap” The cap member 24 is moved toward the inner wall 28 of the hollow portion 18 and the cap member 24 is rotated counterclockwise with respect to the material axis of the joint body 16 (hereinafter referred to as “cap member”). The cap member 24 can be moved in a direction away from the inner wall 28 of the hollow portion 18. An opening formed on the front surface of the cap member 24 (the end surface on the side where the metal tube 12 is inserted) serves as a tube insertion port 30 into which the metal tube 12 is inserted.

  In the hollow portion 18 of the joint body 16, an O-ring 32, a backup ring 34, and a seal member are formed from a back wall 90 formed on the near side (cap member 24 side) to the cap member 24 from the back wall 28. An O-ring 36 as a seal member, a guide member 38, a spring 40, a guide member 42, a lock ring 44, and a wedge member 46 are built in this order. The O-rings 32 and 36, the backup ring 34, the guide members 38 and 42, the lock ring 44, and the wedge member 46 are all annular members.

  The guide member 38 is pressed against the O-ring 36 by the repulsive force of the spring 40, so that the O-rings 32 and 36 are sandwiched between the back wall 90 and the guide member 38 and enter the hollow portion 18. Is retained. A through hole 48 is formed on the inner peripheral surface of these members (O-rings 32 and 36, backup ring 34, guide members 38 and 42, wedge member 46) as a flow path for fluid such as water and hot water. ing. The metal pipe 12 is inserted into the pipe joint 10 in a state where the outer peripheral surface is in contact with the inner peripheral surfaces of the O-rings 32 and 36, thereby ensuring water-stopping at the connecting portion between the metal pipe 12 and the metal pipe 14. .

  The lock ring 44 is a member for detachably holding the metal pipe 12 on the pipe joint 10. When the metal pipe 12 is attached to the pipe joint 10, the cap member 24 is tightened after the metal pipe 12 is inserted to a predetermined depth of the through hole 48, whereby the inclined front surface of the lock ring 44 (surface on the cap member 24 side). ) Is pushed by the wedge member 46 and the claw portion 50 provided on the inner periphery of the lock ring 44 moves inward (to the center axis side of the metal tube 12) and bites into the outer peripheral surface of the metal tube 12. As a result, the metal pipe 12 is held in the pipe joint 10 to prevent the metal pipe 12 from coming out of the pipe joint 10. Further, when the metal pipe 12 is pulled out and removed from the pipe joint 10, the cap member 24 is loosened to move the claw portion 50 to the outside (side away from the central axis of the metal pipe 12). Release the hold state.

  A female screw 52 is formed on the inner peripheral surface of the metal tube 14, and the male screw 22 of the connection portion 20 is screwed into the female screw 52 and tightened, whereby the hollow portion of the metal tube 14 and the joint body 16 are penetrated. The pipe joint 10 is connected to the metal pipe 14 so as to communicate with the hole 48. A nut portion 54 that can be engaged with a tool such as a spanner is formed on the outer peripheral surface on the one end side of the joint body 16 so that the joint body 16 can be rotated by a tool such as a spanner.

  An in-core 56 made of resin is attached to the tip of the metal tube 12. As shown in the perspective view of FIG. 2, the side view of FIG. 3, and the rear view of FIG. 4, the incore 56 is provided at the insertion portion 58 to be inserted into the metal tube 12 and at one end of the insertion portion 58. An annular flange 60 that covers the end surface of the metal tube 12 when the insertion portion 58 is inserted into the metal tube 12, a chamfered portion 62 formed on the outer edge of the flange 60, and a deformation mechanism 64 are provided. . The insertion portion 58 includes a cylindrical portion 68 that forms one end, and arc portions 70A and 70B that project substantially horizontally from the upper and lower portions of the cylindrical portion 68 toward the other end.

  The insertion portion 58 has a slight gap between the outer peripheral surface of the insertion portion 58 (the cylindrical portion 68 and the arc portions 70A and 70B) and the inner peripheral surface of the metal tube 12 when inserted into the metal tube 12. Therefore, the in-core 56 can be easily attached to the metal tube 12 (the insertion portion 58 can be easily inserted).

  The deformation mechanism 64 includes an annular first groove 66 formed along the outer periphery of the insertion portion 58 (cylindrical portion 68) on the outer peripheral surface of one end portion of the insertion portion 58, and the outer periphery of the cylindrical portion 68 on the back surface 74 of the flange portion 60. It is comprised by the cyclic | annular 2nd groove | channel 72 formed in the surface vicinity along the outer periphery of the insertion part 58 (cylindrical part 68). The deformation mechanism 64 may be an annular groove formed along the outer periphery of the insertion portion 58 (cylindrical portion 68) on at least one of the outer peripheral surface of the end portion of the insertion portion 58 and the back surface 74 of the flange portion 60. That is, the deformation mechanism 64 only needs to be configured by at least one of the first groove 66 and the second groove 72.

  Next, the operation and effect of the first embodiment of the present invention will be described.

  As a procedure for connecting the metal pipe 12 to the pipe joint 10, first, as shown in the side sectional view of FIG. 5, with the cap member 24 loosened, the metal pipe 12 with the in-core 56 attached to the tip is attached. It inserts from the pipe body insertion port 30 of the pipe joint 10. When the metal tube 12 is inserted into the pipe joint 10 in the metal tube 12 in which the in-core 56 is not attached to the distal end portion, as shown in the side sectional view of FIG. However, in FIG. 5, the chamfered portion 62 formed on the collar portion 60 contacts the O-rings 32 and 36. Therefore, the O-rings 32 and 36 can be prevented from being damaged or dropped.

  Next, as shown in the side sectional view of FIG. 7, while the outer peripheral surface is brought into contact with the inner peripheral surfaces of the O-rings 32 and 36, the metal tube is brought into contact with the rear wall 28 of the hollow portion 18 until the tip surface of the flange portion 60 hits. 12 is inserted.

  Next, the cap member 24 is tightened, and the metal pipe 12 is locked in the pipe joint 10 by the lock ring 44 (the metal pipe 12 is held in the pipe joint 10 to prevent the metal pipe 12 from coming out of the pipe joint 10. To do). In this state, the hollow portion of the metal tube 12, the hollow portion of the flange portion 60, the through hole 48, and the hollow portion of the metal tube 14 communicate with each other, and fluid such as water and hot water flowing from the metal tube 14 is sent to the metal tube 12. Or a fluid such as water or hot water flowing from the metal tube 12 can be sent to the metal tube 14. In the state of FIG. 7 in which the connection of the metal pipe 12 to the pipe joint 10 is completed, the O-rings 32 and 36 are in contact with the outer surface of the metal pipe 12 but are in contact with the in-core 56. Absent.

  As a procedure for removing the metal pipe 12 from the pipe joint 10, first, the cap member 24 is loosened and the lock state of the metal pipe 12 with respect to the pipe joint 10 by the lock ring 44 is released.

  Next, the metal pipe 12 is pulled out from the pipe joint 10. Here, for example, as shown in the side sectional view of FIG. 8, when the in-core 56 remains in the pipe joint 10 because the flange portion 60 contacts the O-rings 32 and 36, Is inserted through the tube insertion opening 30 and pulled out while pressing the belly of the finger against the inner peripheral surface of the in-core 56 (arc portions 70A, 70B), as shown in the side sectional view of FIG. Even when the flange portion 60 comes into contact, the flange portion 60 is deformed inward (the central axis side of the incore 56) by the deformation mechanism 64, so that the incore 56 remaining in the pipe joint 10 is removed using a tool or the like. It can be easily taken out without

  The action of deforming the flange portion 60 inward (center axis side of the in-core 56) by the deformation mechanism 64 will be described in more detail. The first groove 66 and the second groove 72 constituting the deformation mechanism 64 cause the insertion portion 58 and the flange portion to be deformed. The rigidity of 60 is partially reduced. Thereby, when the collar part 60 contacts the O-rings 32 and 36 and the collar part 60 receives a force directed from the O-rings 32 and 36 toward the inside (the central axis side of the in-core 56), the in-core 56 (the collar part 60). ) Is deformed inward (center axis side of the in-core 56) to reduce the diameter.

Here, in the case where the flange portion 60 contacts the O-rings 32 and 36, the O-rings 32 and 36 are pressed against the outer peripheral surface of the flange portion 60, and the in-core 56 is held by the O-rings 32 and 36. A state, the state where the back surface 74 of the collar part 60 is caught by the O-rings 32 and 36, etc. are considered.
Moreover, since the deformation | transformation mechanism 64 is comprised by the groove | channel (the 1st groove | channel 66, the 2nd groove | channel 72), the deformation | transformation mechanism 64 can be formed by simple process.

  Next, a second embodiment of the present invention and its operation and effect will be described.

In the description of the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and are appropriately omitted.
As shown in the perspective view of FIG. 10, the side view of FIG. 11, and the front view of FIG. 12, the in-core 76 of the second embodiment is formed of resin and has a deformation mechanism 78. The deformation mechanism 78 includes a plurality of slits 80 formed in the flange portion 60 and the cylindrical portion 68. The slit 80 is formed in the material axis direction of the flange portion 60.

  Therefore, even when the collar portion 60 comes into contact with the O-rings 32 and 36 when the in-core 76 (insertion portion 58) is pulled out from the pipe joint 10 by forming a plurality of slits 80, the rigidity of the collar portion 60 is reduced. The flange portion 60 can be deformed inward (to the center axis side of the in-core 76). Thus, if the finger of the hand is inserted through the tube insertion opening 30 and pulled out while pressing the belly of the finger against the inner peripheral surface of the incore 76 (arc portions 70A and 70B), the incore remaining in the pipe joint 10 is retained. 76 can be easily taken out without using a tool or the like.

  The second embodiment of the present invention has been described above.

  In the second embodiment, an example in which the deformation mechanism 78 is configured by the plurality of slits 80 formed in the flange portion 60 and the cylindrical portion 68 is shown. However, the incore 76 in the second embodiment includes the first The deformation mechanism 64 of the embodiment may be provided. That is, the deformation mechanism 64 and the deformation mechanism 78 may be provided in one in-core. Thereby, since the collar part 60 becomes easy to deform | transform into an inner side (center axis side of an incore), the incore which remained in the pipe joint 10 can be taken out more reliably.

  The first and second embodiments of the present invention have been described above.

  In the first and second embodiments, the example in which the in-cores 56 and 76 are attached to the distal end portion of the metal tube 12 as a tubular body is shown. However, the in-cores 56 and 76 are applied to various tubular bodies. can do. For example, a metal tube or a resin tube formed of copper or stainless steel may be used as the tubular body.

  In the first and second embodiments, the example in which the incores 56 and 76 are formed of resin is shown. However, the incores 56 and 76 have the flanges 60 on the inner side (of the incores 56 and 76 by the deformation mechanisms 64 and 78). It may be formed of a material that can be deformed to the center axis side). For example, the in-cores 56 and 76 may be formed of a metal such as copper or stainless steel or a resin.

  In the first and second embodiments, the example in which the insertion portion 58 is configured by the cylindrical portion 68 and the arc portions 70A and 70B is shown. However, the insertion portion is inserted into the tubular body and the in-core is tubular. Any shape may be used as long as it can be attached to the tip of the. For example, the insertion part may be cylindrical.

  In the first and second embodiments, when the insertion portion 58 is inserted into the metal tube 12, there is a slight gap between the outer peripheral surface of the insertion portion 58 and the inner peripheral surface of the metal tube 12. Although the example described above has been shown, means for making it difficult for the insertion portion 58 inserted into the metal tube 12 to come out of the metal tube 12 may be provided.

  For example, an insertion portion 58 having an outer diameter slightly larger than the inner diameter of the metal tube 12 may be fitted into the metal tube 12, or like the incore 84 shown in the side view of FIG. 13 and the rear view of FIG. The outer diameter may be slightly larger than the inner diameter of the metal tube 12, and a cylindrical insertion portion 86 in which one or more slits 82 are formed in the material axis direction of the in-core 84 may be fitted into the metal tube 12.

  In this case, the slit 82 may be formed over the entire length of the insertion portion 86 with respect to the material axis direction of the in-core 84, or only the center portion or the tip portion of the insertion portion 86 with respect to the material axis direction of the in-core 84. You may form in. The width of the slit 82 may be determined as appropriate.

  Further, for example, as shown in the side view of FIG. 15, a protrusion 88 may be provided in the vicinity of the other end of the outer peripheral surface of the insertion portion 86 in the in-core 84 (the side where the flange portion 60 is not provided).

  When the in-core provided with a means for making it difficult for the insertion portion 58 inserted into the metal tube 12 to be removed from the metal tube 12 is pulled out from the pipe joint 10 in the metal tube 12 attached to the distal end, the in-core is removed. When the collar portion 60 comes into contact with the O-rings 32 and 36 incorporated in the pipe joint 10, the incore collar portion 60 is deformed inward and the incore is attached to the metal tube 12 as described with reference to FIG. 9. The metal tube 12 can be pulled out smoothly while remaining.

  Further, there is not enough means to make the insertion portion 58 inserted into the metal tube 12 difficult to come out of the metal tube 12, and when the incore is removed from the metal tube 12 and the incore remains in the pipe joint 10, first, As described, if the finger of the hand is inserted from the tube insertion port 30 and pulled out while pressing the belly of the finger against the inner peripheral surface of the incore, the incore remaining in the pipe joint 10 can be taken out.

  That is, according to the present invention, the incore remaining in the pipe joint can be pulled out from the pipe joint, and further, the incore attached to the distal end portion of the pipe body can be pulled out from the pipe joint together with the pipe body.

  As mentioned above, although 1st and 2nd embodiment of this invention was described, this invention is not limited to such embodiment at all, You may use combining 1st and 2nd embodiment, Needless to say, the present invention can be implemented in various modes without departing from the gist of the present invention.

10 Pipe Fitting 12 Metal Pipe (Tube)
32, 36 O-ring (seal member)
56, 76, 84 In-core 58, 86 Insertion part 60 Gutter part 62 Chamfering part 64, 78 Deformation mechanism 66 First groove (groove)
72 Second groove (groove)
74 Back 80 Slit

Claims (3)

In the in-core attached to the pipe inserted into the pipe joint in contact with the annular seal member built in the pipe joint at the position of the tip of the pipe,
An insertion portion to be inserted into the tubular body;
An annular flange that is provided at an end of the insertion portion and covers an end surface of the tubular body when the insertion portion is inserted into the tubular body;
A chamfered portion formed at the outer edge of the front end of the flange,
A deformation mechanism for deforming the flange part in contact with the sealing member when the insertion part is pulled out from the pipe joint;
Having in-core.   2. The in-core according to claim 1, wherein the deformation mechanism is an annular groove formed along at least one of an outer peripheral surface of an end portion of the insertion portion and a rear surface of the flange portion along the outer periphery of the insertion portion.   The in-core according to claim 1, wherein the deformation mechanism is a slit in a material axis direction of the flange portion formed in the flange portion.

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