JP2012219934A - Pipe joint and mounting method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe joint by which a mounting position can be maintained with respect to a fluid pipe during a period until the completion of thermal fusion bonding, and a mounting method for the same.SOLUTION: The pipe joint 2 has a casing 5 which includes a branch part 3, formed with a branch opening 3g communicating with a drilled hole Q1 to be drilled in a fluid pipe 1, and a cover body 4 for adheringly covering the outer peripheral surface 1a of the fluid pipe 1 together with the branch part 3 and in which heating parts 3b, 4b are respectively arranged in the branch part 3 and the cover body 4. The pipe joint is configured to subject the casing 5 and the fluid pipe 1 to thermal fusion bonding in the following manner. A part of the fluid pipe is brought into contact with the branch part and the cover body by adheringly covering the fluid pipe 1 with the branch part 3 and the cover body 4. The part is heated by the heating parts 3b, 4b, thereby subjecting the casing and the fluid pipe to thermal fusion bonding. Locking claws 3f, 4e are respectively formed on the branch part 3 and the cover body 4 so as to be locked to the fluid pipe 1 by being tightly fastened to each other.

Description

  The present invention includes a branch part in which a branch port communicating with a perforation formed in a fluid pipe is formed, and a cover body that covers the outer peripheral surface of the fluid pipe in close contact with the branch part. The body and the fluid pipe are provided by heating the portion that has a casing in which the heating unit is disposed on the body and the fluid pipe is closely covered with the branch part and the cover body by the heating unit. The present invention relates to a pipe joint for heat-sealing and a method for mounting the pipe joint.

  Conventionally, a half-branched branch saddle with a branch pipe connecting part (branch port) for connecting a branch pipe to a welded pipe (fluid pipe) is embedded in a heat-welding heat line (heating part). In order to fix the provided electric fusion joint (pipe joint) to the fused pipe, a branch saddle is arranged on the fused pipe, and one end of the belt-like holder is attached to one flange of the branched saddle from below. The other end of the belt-like holder is attached to the other flange of the branch saddle, the electric fusion joint and the fusion pipe are fastened, and the heat fusion wire is heated to connect the electric fusion joint and the fusion pipe. Some are heat-sealed (for example, refer to Patent Document 1).

JP 2001-193889 A (3rd page, FIG. 1)

  However, in the electric fusion joint (pipe joint) described in Patent Document 1, only the frictional force generated by fastening the electric fusion joint and the fusion-bonded pipe to the fusion-bonded pipe with the belt-like holder is used. Therefore, when the contact surface between the electric fusion joint and the fused pipe is melted by heating of the heat ray (heating portion), the electric fusion joint and the fused pipe are There is a problem that the frictional force between the two is reduced, and the electric fusion joint moves with respect to the fused pipe.

  The present invention has been made paying attention to such a problem, and is capable of maintaining a mounting position with respect to a fluid pipe until heat fusion is completed, and a pipe joint mounting method The purpose is to provide.

In order to solve the above problems, the pipe joint of the present invention is
A branch part formed with a branch port communicating with the perforation formed in the fluid pipe, and a cover body that tightly covers the outer peripheral surface of the fluid pipe together with the branch part, the branch part and the cover A body having a heating unit disposed on the body, and by heating the portion that comes into contact by covering the fluid pipe closely with the branching unit and the cover body by the heating unit, A pipe joint for heat-sealing a housing and the fluid pipe,
The branch portion and the cover body are formed with locking claws that are locked to each other by being fastened to each other.
According to this feature, as the branch portion and the cover body are tightened, the housing is fluidized by locking the locking claw formed on the branch portion and the locking claw formed on the cover body to the fluid pipe. Since it can be temporarily fixed to the tube, the heating part is heated in a state in which these locking claws are locked to the fluid pipe, so that the mounting position of the housing with respect to the fluid pipe is maintained by the locking claws. The body and the fluid pipe can be heat-sealed.

The pipe joint of the present invention is
A flange for tightening the branch portion and the cover body is formed in the branch portion and the cover body, and the locking claw is formed in the vicinity of the flange in the branch portion and the cover body. It is characterized by being.
According to this feature, the locking claw formed on the branch part and the fluid pipe of the locking claw formed on the cover body by tightening the flange formed on the branch part and the flange formed on the cover body. Due to the biting action, the opposing surfaces of the flange formed on the branch portion and the flange formed on the cover body can be easily brought into contact with each other.

The pipe joint of the present invention is
Between the flange formed in the said branch part and the flange formed in the said cover body, the gap | interval which becomes gradually wide is formed in the outer-diameter direction of the said fluid pipe | tube, It is characterized by the above-mentioned.
According to this feature, the opposing surfaces of the flange formed on the branch portion and the flange formed on the cover body are made uniform by tightening the flange formed on the branch portion and the flange formed on the cover body. Can be secured as a wide abutment surface, so that a uniform fusion part fused by heat fusion between the flange formed at the bifurcation and the flange formed on the cover body Can be formed.

The fitting method of the pipe joint of the present invention is as follows:
A branch part formed with a branch port communicating with the perforation formed in the fluid pipe, and a cover body that tightly covers the outer peripheral surface of the fluid pipe together with the branch part, the branch part and the cover A body having a heating part disposed on the body, and heating the contact portion between the branch part and the cover body and the fluid pipe by the heating part, thereby A method of mounting a pipe joint for heat fusion,
The branch portion and the cover body are formed with a locking claw that is locked to the fluid pipe by being fastened to each other, and the locking portion is fastened by tightening the branch portion and the cover body. After the claw is locked to the fluid pipe, the contact portion between the branch part and the cover body and the fluid pipe is heated by the heating part.
According to this feature, as the branch portion and the cover body are tightened, the housing is fluidized by locking the locking claw formed on the branch portion and the locking claw formed on the cover body to the fluid pipe. Since it can be temporarily fixed to the tube, the heating part is heated in a state in which these locking claws are locked to the fluid pipe, so that the mounting position of the housing with respect to the fluid pipe is maintained by the locking claws. The body and the fluid pipe can be heat-sealed.

It is sectional drawing which shows the state which has arrange | positioned the pipe joint in Example 1 to the fluid pipe | tube. It is sectional drawing which shows the state which fastened the flange of the branch part and the flange of the cover body. It is a sectional side view which shows the state by which the perforation was pierced by the fluid pipe | tube from the 1st branch port and the 2nd branch port. It is a sectional side view which shows attachment of the valve lid which accommodated the fluid control to a 1st branch port. It is sectional drawing which shows the state in which the valve cover was attached to the 1st branch port. It is a sectional side view which shows the state in which the valve cover was attached to the 1st branch port. It is a sectional side view which shows the state which attached the branch pipe between both 2nd branch ports using the two pipe joints attached to the fluid pipe. It is a partial sectional side view which shows the pipe joint to which the 1st seal body and the 2nd seal body in Example 2 were attached. It is sectional drawing which shows a 1st seal body. It is an AA end view which shows the 1st seal body and the 2nd seal body in FIG.

  EMBODIMENT OF THE INVENTION The form for implementing the pipe joint which concerns on this invention, and the attachment method of a pipe joint is demonstrated below based on an Example.

  A pipe joint and a pipe joint mounting method according to the first embodiment will be described with reference to FIGS. 1 to 7. As shown in FIG. 1, the fluid pipe 1 of the present embodiment is made of a resin pipe such as high-density polyethylene formed in a substantially circular shape in cross section, and clean water as a fluid flows inside. For example, in order to attach a branch pipe or the like to a predetermined place, the fluid pipe 1 is provided with the pipe joint 2 of the present invention on the upstream side and the downstream side from the construction place of the branch pipe, as shown in FIG. The location where the branch pipe of the fluid pipe 1 is attached is shut off by shutting off the pipe of the fluid pipe 1 by the fluid control 11 attached to the pipe joint 2 so that the branch pipe can be easily attached to the fluid pipe 1. It has become.

  The material of the fluid pipe is not limited to high-density polyethylene, and may be a heat-sealable material made of polyolefin resin or a predetermined resin. Furthermore, in the present embodiment, the fluid in the fluid pipe 1 is clean water, but the fluid flowing inside the fluid pipe is not necessarily limited to clean water, and may be, for example, industrial water or sewage, or gas. Or a fluid pipe through which a fluid in a gas-liquid mixed state flows may be used.

  The pipe joint 2 fixedly attached to the outer peripheral surface 1a of the fluid pipe 1 is a so-called split T-shaped pipe, and is disposed from above with respect to the fluid pipe 1 as shown in FIGS. 1 is constituted by a housing 5 provided with a branch portion 3 that covers the upper side of the outer periphery of 1 and a cover body 4 that is disposed from below with respect to the fluid pipe 1 and covers the lower side of the outer periphery of the fluid pipe 1. Yes. The branch part 3 and the cover body 4 are made of a heat-sealable resin material such as high-density polyethylene.

  Among these, the branch part 3 is provided with the contact part 3a contact | abutted to the outer peripheral surface 1a in the upper part of the fluid pipe | tube 1. As shown in FIG. Inside the abutting portion 3a that abuts the outer peripheral surface 1a in the upper part of the fluid pipe 1, a heating wire 3b as a heating portion in the present invention, which generates heat when current flows, is perforated in the fluid pipe 1 described later. It extends continuously over substantially the entire contact portion 3a so as to surround the periphery of Q1 and Q2. Each end of the heating wire 3b is connected to a connection portion 6 provided on the outer surface of the branch portion 3 so as to be electrically connectable to an external power source.

  Further, flanges 3 c and 3 c are formed on the branch portion 3 so as to protrude from the contact portion 3 a toward the outer diameter direction of the fluid pipe 1. The width dimension of the flange 3c in the fluid pipe 1 in the pipe axis direction is formed to be substantially the same as the width dimension in the pipe axis direction of the fluid pipe 1 of the branch portion 3. Inside these flanges 3c, heating wires 3d are extended over substantially the entire length of the flanges 3c, 3c in the fluid pipe 1 in the tube axis direction. Each end of the heating wire 3d is connected to a connecting portion 7 provided on the outer surface of the flanges 3c, 3c so as to be electrically connected to an external power source. Further, as shown in FIG. 1, the lower ends of the flanges 3 c and 3 c are formed on a tapered surface 3 e that is inclined upward in the outer diameter direction of the fluid pipe 1.

  A locking claw 3f is formed in the contact portion 3a in the vicinity of the flanges 3c, 3c so as to project toward the inner diameter direction of the fluid pipe 1. Although not specifically shown, these locking claws 3f are continuously formed over substantially the entire length of the fluid pipe 1 of the contact portion 3a in the pipe axis direction.

  In addition, a first branch port 3g and a second branch port 3h are formed on the upper part of the branch part 3 so as to be substantially perpendicular to the tube axis of the fluid tube 1 along the tube axis direction of the fluid tube 1. Has been. The first branch port 3g is formed to penetrate in the vertical direction, and an upper flange 3i is formed at the upper end of the first branch port 3g. Similarly to the first branch port 3g, the second branch port 3h is formed to penetrate in the vertical direction, and an upper flange 3j is formed at the upper end of the second branch port 3h.

  On the other hand, as shown in FIGS. 1 and 3, the cover body 4 has a width dimension in the tube axis direction of the fluid pipe 1 that is substantially the same as that of the branch portion 3, and abuts on the outer peripheral surface 1 a in the lower part of the fluid pipe 1. A contact portion 4a is provided. Inside the abutting portion 4a that abuts on the outer peripheral surface 1a in the lower part of the fluid pipe 1, a heating wire 4b as a heating portion in the present invention, which generates heat when an electric current flows, continuously extends over substantially the entire abutting portion 4a. It is extended. Each end of the heating wire 4b is connected to a connection portion 8 provided on the outer surface of the cover body 4 so as to be electrically connectable to an external power source.

  Further, flanges 4 c and 4 c are formed on the cover body 4 so as to protrude from the contact portion 4 a toward the outer diameter direction of the fluid pipe 1. The width dimension in the tube axis direction of the fluid pipe 1 of these flanges 4 c is formed to be substantially the same as the width dimension in the tube axis direction of the fluid pipe 1 of the cover body 4. Further, the upper ends of the flanges 4c and 4c are formed on a horizontal plane 4d as shown in FIG.

  These flanges 4 c are disposed so as to face the flange 3 c formed in the branch portion 3 by arranging the cover body 4 with respect to the fluid pipe 1 from below. For this reason, the branch part 3 and the cover body 4 are arranged in the vertical direction with respect to the fluid pipe 1, so that the vertical width dimension gradually increases in the outer diameter direction of the fluid pipe 1 between the flanges 3 c and 4 d. A gap 9 is formed.

  A locking claw 4e is formed in the contact portion 4a in the vicinity of both flanges 4c, 4c so as to protrude toward the inner diameter direction of the fluid pipe 1. These locking claws 4e are formed continuously over substantially the entire length in the tube axis direction of the fluid pipe 1 of the contact portion 4a.

  In order to attach the pipe joint 2 configured in this manner to the fluid pipe 1, first, as shown in FIG. 1, the branch portion 3 is disposed from above with respect to the fluid pipe 1, and the cover body 4 is attached to the fluid pipe 1. It arrange | positions with respect to the fluid pipe | tube 1 from the downward direction. At this time, the first branch is made in advance at the planned drilling locations of the perforations Q1 and Q2 of the fluid pipe 1 (in the upper part of the fluid pipe 1 in this embodiment) so that the perforations Q1 and Q2 to be described later can be easily perforated. The branch part 3 is disposed so that the port 3g and the second branch port 3h communicate with each other.

  Next, as shown in FIG. 2, both flanges 3 c and 4 d are tightened with bolts and nuts 10. At this time, the tapered surface 3e formed on the flange 3c and the horizontal surface 4d formed on the flange 4c are in close contact with each other in order from the inner diameter direction of the fluid pipe 1 toward the outer diameter direction. At the same time, the flanges 3c and 4d are tightened by the bolts and nuts 10 to elastically deform the fluid pipe 1 in the vicinity of the flange 3c of the branch part 3 and in the vicinity of the flange 4c of the cover body 4. 3 f and 4 e bite into the outer peripheral surface 1 a of the fluid pipe 1. These locking claws 3 f and 4 e bite into the outer peripheral surface 1 a of the fluid pipe 1, so that the housing 5 is temporarily fixed to the fluid pipe 1 so as not to move.

  Next, as shown in FIG. 3, a power cable connected to an external power source (not shown) is connected to each connection portion 6, 7 formed in the branch portion 3 and a connection portion 8 formed in the cover body 4, Power is supplied from the external power source for a predetermined time. The heating wires 3b, 3d, 4b supplied with power generate heat at a high temperature, so that the contact portions 3a, 4a made of resin, the outer peripheral surface 1a of the fluid pipe 1 in contact with the contact portions 3a, 4a, and the flange 3c and 4d are heated and melted gradually.

  As shown in FIG. 3, the melted contact portions 3a, 4a and the outer peripheral surface 1a of the fluid pipe 1 and the flanges 3c, 4d are mixed with each other to stop heat generation by the heating wires 3b, 3d, 4b. By being lowered to room temperature, it is transformed into a heat-bonding region W that is integrated and solidified. In this way, the pipe joint 2 is attached to the fluid pipe 1 in a watertight manner. In addition, since each latching claw 3f, 4e continues to bite into the outer peripheral surface 1a of the fluid pipe 1 while the heat-sealing region W is formed, the planned drilling location, the first branch port 3g, Misalignment of the second branch port 3h is prevented.

  Next, attachment of the fluid control 11 and the branch pipe 12 to the pipe joint 2 attached to the fluid pipe 1 will be described.

  First, as shown in FIG. 3, an upper case 35 having a working valve 36 and a punching device 50 disposed therein is connected to the upper flange 3i of the first branch port 3g in a watertight manner. The perforating apparatus 50 is connected to a driving means (not shown) and has a shaft member 51 extending in the axial direction in the first branch port 3g toward the fluid pipe 1 and a fluid pipe 1 fixed to the tip of the shaft member 51. The cutter member 52 is provided with a sharp perforating blade 52a, and the cutter member 52 extends in the axial direction of the shaft member 51 so that the outer peripheral surface 1a of the fluid pipe 1 is pressed by the perforating blade 52a. The perforation Q1 is made in the pipe wall of the fluid pipe 1 by cutting. By perforating Q1 in the fluid pipe 1 by the cutter member 52, the perforation Q1 and the first branch port 3g communicate with each other.

  The punching device 50 in this embodiment includes a section contact member (not shown) that can move in the cutter member 52 in the axial direction of the shaft member 51. The section abutting member is formed in a shape in which the lower end portion abuts on the outer peripheral surface 1 a of the fluid pipe 1 and is urged toward the fluid pipe 1 by a coil spring or the like in the cutter member 52.

  For this reason, when the cutter member 52 cuts the fluid pipe 1, the section abutting member stays at a position where it abuts on the outer peripheral surface 1 a of the fluid pipe 1, and the coil spring is compressed so that only the cutter member 52 is in the fluid pipe 1. Progress towards the tube axis. When the cutter member 52 drills the perforation Q1 in the fluid pipe 1, the section cut out from the fluid pipe 1 is held in the cutter member 52 in contact with the section abutting member.

  Similarly, the upper case 37 in which the work valve 38 and the punching device 53 are disposed is connected to the upper flange 3j of the second branch port 3h in a watertight manner. The perforating device 53 is connected to a driving means (not shown) and has a shaft member 54 extending in the axial direction toward the fluid pipe 1 in the second branch port 3h, and is fixed to the tip of the shaft member 54 so as to drill the fluid pipe 1 And a cutter member 55 having a sharp perforating blade 55a. The cutter member 55 is extended in the axial direction of the shaft member 54 to press the outer peripheral surface 1a of the fluid pipe 1 by the perforating blade 55a. The perforation Q2 is formed in the pipe wall of the fluid pipe 1 by cutting. By perforating Q2 in the fluid pipe 1 by the cutter member 55, the perforation Q2 and the second branch port 3h communicate with each other.

  The perforation device 53 for perforating the perforation Q2 has substantially the same configuration as the perforation device 50 for perforating the perforation Q1, and a section generated by perforating the fluid pipe 1 is placed in the cutter member 55. It comes to hold.

  After the piercing devices Q1 and Q2 are drilled by the piercing devices 50 and 53, as shown in FIG. 4, after the piercing device 50 is pulled up and disposed in the upper case 35, the work valve 36 is operated to operate the first. Water is stopped at the branch port 3g. And while removing the punching apparatus 50 from the upper end part of the upper case 35, as shown in FIG. 4, the outer cover 70 is watertightly connected to the upper end part of the upper case 35. As shown in FIG. The outer cover 70 is provided with a pair of openings 71, 71 facing sideways, and these openings 71, 71 are watertightly closed by lid bodies 72, 72 and bolts / nuts 73.

  An arm (not shown) is attached to an upper end (not shown) of the outer cover 70 so as to be movable up and down. In addition, a valve lid 60 in which a fluid control 11 for blocking or opening the conduit of the fluid pipe 1 is previously connected via an intermediate member 75 to the lower end portion of the arm. The valve lid 60 is disposed in the outer cover 70 when the arm is attached to the upper end of the outer cover 70. The arm and the upper end of the outer cover 70 are watertightly held by a rubber body (not shown). Furthermore, the intermediate member 75 is formed in a cylindrical shape, and a rotation operation portion 63a described later is inserted and disposed therein (see FIG. 5).

  After the outer cover 70 is connected to the upper end of the upper case 35 in a watertight manner, the first branch port 3g and the outer cover 70 are connected by a communication member such as a hose or a bypass pipe (not shown) having an on-off valve. Then, an air valve (not shown) provided at the upper end portion of the outer cover 70 is opened, and the work valve 36 is operated to open the first branch port 3g, whereby the inside of the outer cover 70 and the first branch port 3g. Is filled with clean water flowing in the fluid pipe 1.

  After the inside of the outer cover 70 and the first branch port 3g are filled with clean water, the air valve is closed, the on-off valve is opened, and the first branch port 3g and the outer cover 70 are communicated. By keeping the water pressure in the outer cover 70 and the water pressure in the first branch port 3g constant at all times, the valve lid 60 is pressed in an indefinite water state by a pressing means (not shown) attached to the outer cover 70 in advance. The valve lid 60 is assembled in a sealed manner to the upper flange 3i of the first branch port 3g.

  At this time, the inside of the first branch port 3g and the inside of the outer cover 70 are filled with the clean water flowing in the fluid pipe 1 and have the same water pressure. Therefore, when the valve lid 60 is assembled to the upper flange 3i, the fluid pipe 1 The drag received by the valve lid 60 from the clean water flowing inside can be kept small. After the valve lid 60 is assembled to the upper flange 3i, the lid bodies 72, 72 are removed, and the intermediate member 75 is separated from the valve lid 60 through the openings 71, 71.

  As shown in FIGS. 4 and 5, the valve lid 60 has an outer diameter smaller than the inner diameter of the first branch port 3g, and is provided by an O-ring 61 provided along the outer periphery of the lower portion of the valve lid 60. The water is fitted in a watertight manner along the inner peripheral surface of the first branch port 3g. Further, the position of the valve lid 60 is fixed by screwing a fixing bolt 62 from the outside of the first branch port 3g so that the valve lid 60 is fixed. The fixing bolt 62 is screwed into the valve lid 60 to regulate the valve lid 60 in the vertical direction.

  As shown in FIG. 5, the rotating screw 63 is rotatably attached to an insertion hole 64 formed in the top of the valve lid 60 and has an upper end projecting outside the valve lid 60. The holding plate 65 is fixed to the upper end surface of the valve lid 60 with a bolt 66 and prevents the rotation screw 63 from being pulled out. With the above configuration, the rotating screw 63 is rotatable in both forward and reverse directions with respect to the valve lid 60 but does not move up and down. Reference numeral 63b denotes a screw portion having a peripheral surface screwed over substantially the entire length except for the upper end portion of the rotary screw 63.

  As shown in FIGS. 4 and 5, the screw top 67 is fitted in the guide groove 69 formed in the upper end portion of the fluid control 11 and is screwed into the screw portion 63 b, and the upper end portion of the rotating screw 63. The screw part 63b rotates according to the rotation of the rotation operation part 63a formed in the above, so that the fluid control 11 can move up and down following the screw top 67 screwed along the screw part 63b.

  As shown in FIGS. 5 and 6, the fluid control 11 has an insertion hole 68 into which the screw portion 63 b of the rotating screw 63 is inserted. In addition, overhanging portions 11a and 11a along the vertical direction can be slidably contacted along the groove portion 60a provided on the inner surface of the valve lid 60 or the first branch port 3g on the outer surface of the upstream and downstream sides of the fluid control 11. It extends in the vertical direction. The overhanging portions 11a, 11a configured as described above come into contact with the groove portion 60a, so that the rotation of the fluid control 11 accompanying the rotation of the rotating screw 63 can be regulated.

  By pressing the valve lid 60 to which the fluid control 11 is attached in this manner toward the first branch port 3g by the pressing means attached in advance to the outer cover after the work valve 36 is opened, in an indefinite water state. The valve lid 60 is assembled in a sealed manner to the upper flange 3i of the first branch port 3g while suppressing the drag received by the valve lid 60 from the water flowing in the fluid pipe 1 and the fixing bolt 62 is screwed into the valve lid 60. To do. Further, the on-off valve of the communication member is closed, and the upper case 35 and the outer cover 70 are removed from the upper flange 3i. Finally, a ring-shaped flange 56 is inserted into the valve lid 60, and the flange 56 and the first branch port 3g are fastened with bolts and nuts 57.

  Thereafter, as shown in FIGS. 5 and 6, the fluid control 11 moves downward due to the rotation of the rotation operation portion 63 a by a handle (not shown), thereby abuts in a watertight manner while elastically deforming the inner peripheral surface of the fluid pipe 1. Thus, the conduit of the fluid pipe 1 can be opened by blocking the conduit of the fluid pipe 1 and moving upward by the rotation of the rotation operation portion 63a by the handle.

  After the perforating device 53 at the second branch port 3h is pulled up and disposed in the upper case 37, the work valve 38 is operated to stop the water at the second branch port 3h, and the perforating device 53 is moved to the upper case. Remove from the top of 37.

  As shown in FIG. 7, the pipe joint 2 in which the control fluid 11 is attached to the fluid pipe 1 is attached to the upstream side and the downstream side of the fluid pipe 1 so that the side on which the control fluid 11 is attached is opposed. . Next, the second branch ports 3 h of both pipe joints 2 and 2 are connected via the branch pipe 12.

  By doing in this way, when performing installation work of a branch pipe etc. in the predetermined part between both pipe joints 2 in fluid pipe 1, flow control between both pipe joints 2 and 2 by fluid control 11 and 11 Can be closed. Since the clean water flowing in the fluid pipe 1 can bypass the pipe joints 2 and 2 via the branch pipe 12 by opening the work valves 38 and 38, the fluid pipe 1 can be connected. In general households, it is possible to use clean water without water interruption.

  Next, the pipe joint according to the second embodiment will be described with reference to FIGS. In addition, the same structure as the said Example is abbreviate | omitted.

  As shown in FIGS. 8, 9, and 10, in the pipe joint 2 in the present embodiment, the fluid pipe 1 of the housing 5 is interposed between the flange 3 c of the branch portion 3 and the flange 4 c of the cover body 4. A pair of first seal bodies 80 and 80 are attached so as to cover substantially the entire length in the tube axis direction of the tube 5. A pair of second seal bodies 81, 81 that cover the space between the branch section 3 and the cover body 4 and the fluid pipe 1 are attached. The first seal body 80 and the second seal body 81 are made of a heat-sealable resin material such as high-density polyethylene, like the branch portion 3 and the cover body 4.

  Of these, the first seal body 80 includes a long side portion 80a having substantially the same size as the width direction in the pipe axis direction of the fluid pipe 1 of the pipe joint 2, and both end portions in the pipe axis direction of the fluid pipe 1 of the long side portion 80a. The short side portions 80b and 80b facing the inner diameter direction of the fluid pipe 1 are formed.

  In the first seal body 80, a heating wire 80c that generates heat when current flows is continuously extended over the entire length of the first seal body 80, and each end of the heating wire 80c is connected to the outside of the first sealing body 80. It is connected to a connecting portion 82 provided on the outer surface of the first seal body 80 so that it can be electrically connected to the power source.

  Further, the second seal body 81 is formed in an arc shape along the outer peripheral surface 1 a of the fluid pipe 1, and the branch portion 3 is formed on the side surface of the fluid pipe 1 facing the housing 5 in the tube axis direction. A plurality of protrusions 81a that can be locked to locking holes 84 formed at both ends of the fluid pipe 1 of the cover body 4 in the tube axis direction are formed.

  Further, in the second seal body 81, similarly to the first seal body 80, a heating wire e that generates heat when a current flows is continuously extended over the entire length of the second seal body 81, Each end portion of the heating wire 81b is connected to a connection portion 83 provided on the outer surface of the second seal body 81 so as to be electrically connected to an external power source.

  In order to attach the first seal body 80 and the second seal body 81 configured as described above to the housing 5, first, the protrusion 81 a of each second seal body 81 is locked in the locking hole 84. The second seal body 81 is brought into contact with both ends in the pipe axis direction of the fluid pipe 1 of the branching section 3 forming the upper part of the casing 5, and the pipe axis direction of the fluid pipe 1 of the cover body 4 forming the lower part of the casing 5. The second seal body 81 is also brought into contact with both end portions of. Each second seal body 81 contacts the branch portion 3 or the cover body 4 and also contacts the outer peripheral surface 1a of the fluid pipe 1 at the same time. A gap 85 into which the short side portion 80b of the first seal body 80 can be inserted is formed between the upper and lower second seal bodies 81, 81 at each end.

  Next, the first seal body 80 is attached to the housing 5 by inserting both short side portions 80 b into gaps 85, 85 formed at both ends in the tube axis direction of the fluid pipe 1 of the housing 5. At this time, the long side portion 80a of the first seal body 80 is in contact with the outer diameter direction side end portion of the fluid pipe 1 of the flanges 3c and 4d over substantially the entire length of the fluid pipe 1 in the tube axis direction.

  Thus, after the 1st seal body 80 and the 2nd seal body 81 are attached to the housing | casing 5, the power cable connected to the external power supply which is not shown in figure is connected to each connection part 82 and 83, and the heating wire 80c, By heating 81b, the first seal body 80 and the flanges 3c and 4d are melted, and between the second seal body 81 and the branch portion 3 and between the outer peripheral surface 1a of the fluid pipe 1, the second seal body 81 and the cover. The body 4 and the outer peripheral surface 1a of the fluid pipe 1 are melted.

  Then, by stopping the heat generation by the heating wires 80c and 81b, between the first seal body 80 and the flanges 3c and 4d, between the second seal body 81 and the branch portion 3, and between the outer peripheral surface 1a of the fluid pipe 1, and the second seal body. 81 and the cover body 4 and between the outer peripheral surface 1a of the fluid pipe 1 are formed in a heat-sealed region (not shown) solidified. For this reason, the pipe joint 2 and the fluid pipe 1 are completely sealed by heat fusion by the first seal body 80 and the second seal body 81.

  As described above, in the pipe joint 2 of the present invention, the branching portion 3 and the cover body 4 are formed with the locking claws 3f and 4e that are locked to the fluid pipe 1 by being fastened to each other. When the branch part 3 and the cover body 4 are tightened, the locking claw 3f formed on the branch part 3 and the locking claw 4e formed on the cover body 4 are locked to the fluid pipe 1 so that the casing is 5 can be temporarily fixed to the fluid pipe 1, so that the heating wires 3b and 4b are heated while the locking claws 3f and 4e are locked to the fluid pipe 1, so that the locking claws 3f and 4e The housing 5 and the fluid tube 1 can be heat-sealed while maintaining the mounting position of the housing 5 with respect to the fluid tube.

  Further, the branch part 3 and the cover body 4 are formed with flanges 3c and 4d for tightening the branch part 3 and the cover body 4, and the locking claws 3f and 4e are formed in the branch part 3 and the cover body 4, respectively. Since it is formed in the vicinity of the flanges 3c and 4d, the locking claw 3f formed on the branch portion 3 and the flange 4c formed on the cover body 4 are fastened by tightening the flange 3c formed on the branch portion 3 and the flange 4c formed on the cover body 4. Due to the biting action of the locking claws 4e formed on the cover body 4 into the fluid pipe 1, the opposing surfaces of the flange 3c formed on the branch portion 3 and the flange 4c formed on the cover body 4 can easily be brought into uniform contact with each other. can do.

  Further, a gap 9 that gradually increases in the outer diameter direction of the fluid pipe 1 is formed between the flange 3 c formed on the branch portion 3 and the flange 4 c formed on the cover body 4. By tightening the flange 3c formed on the cover body 4 and the flange 4c formed on the cover body 4, both opposing surfaces of the flange 3c formed on the branch portion 3 and the flange 4c formed on the cover body 4 are made uniform. Since the taper surface 3e and the horizontal surface 4d can be secured as a wide contact surface by abutting, between the flange 3c formed on the branch portion 3 and the flange 4c formed on the cover body 4, A uniform fusion part fused by heat fusion can be formed.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the said Example, since the latching claws 3f and 4e are integrally formed in the branch part 3 and the cover body 4, they are comprised with the resin material same as the branch part 3 and the cover body 4, The locking claws may be configured separately from a hard resin material or metal material, and the locking claws may be provided intermittently along the tube axis direction of the fluid pipe 1 at the contact portions 3a and 4a. .

  Moreover, in the said Example, the lower end part of the flange 3c is formed in the taper surface 3e which inclines upwards toward the outer-diameter direction of the fluid pipe | tube 1, and the upper end part of the flange 4c is formed in the horizontal surface 4d. The gap 9 is formed between the flanges 3c and 4c so that the vertical width dimension gradually increases in the outer diameter direction of the fluid pipe 1 between the flanges 3c and 4c. If the gap 9 is formed, for example, the lower end portion of the flange 3c may be formed in a horizontal plane, and the upper end portion of the flange 4c may be formed in a tapered surface inclined downward toward the outer diameter direction of the fluid pipe 1. In addition, for example, the lower end of the flange 3c is formed in a tapered surface that is inclined upward toward the outer diameter direction of the fluid pipe 1, and the upper end of the flange 4c is directed downward toward the outer diameter direction of the fluid pipe 1. Formed on an inclined taper surface It may be so that.

DESCRIPTION OF SYMBOLS 1 Fluid pipe 1a Outer peripheral surface 2 Pipe joint 3 Branch part 3a Contact part 3b Heating wire (heating part)
3c Flange 3d Heating wire 3f Locking claw 3g First branch port 3h Second branch port 4 Cover body 4a Contact portion 4b Heating wire (heating portion)
4c Flange 4e Locking claw 5 Housing 9 Gap 11 Fluid control 12 Branch pipe 50 Punching device 53 Punching device 53 First sealing body 80c Heating wire 81 Second sealing body 81b Heating wire Q1, Q2 Drilling W Thermal fusion region

Claims (4)

A branch part formed with a branch port communicating with the perforation formed in the fluid pipe, and a cover body that tightly covers the outer peripheral surface of the fluid pipe together with the branch part, the branch part and the cover A body having a heating unit disposed on the body, and by heating the portion that comes into contact by covering the fluid pipe closely with the branching unit and the cover body by the heating unit, A pipe joint for heat-sealing a housing and the fluid pipe,
The branch joint and the cover body are each formed with a locking claw that locks against the fluid pipe by being fastened to each other.   A flange for tightening the branch portion and the cover body is formed in the branch portion and the cover body, and the locking claw is formed in the vicinity of the flange in the branch portion and the cover body. The pipe joint according to claim 1, wherein   The clearance gap which becomes gradually wide is formed in the outer-diameter direction of the said fluid pipe | tube between the flange formed in the said branch part, and the flange formed in the said cover body. Pipe fittings. A branch part formed with a branch port communicating with the perforation formed in the fluid pipe, and a cover body that tightly covers the outer peripheral surface of the fluid pipe together with the branch part, the branch part and the cover A body having a heating part disposed on the body, and heating the contact portion between the branch part and the cover body and the fluid pipe by the heating part, thereby A method of mounting a pipe joint for heat fusion,
The branch portion and the cover body are formed with a locking claw that is locked to the fluid pipe by being fastened to each other, and the locking portion is fastened by tightening the branch portion and the cover body. A fitting method for a pipe joint, wherein after the claw is locked to the fluid pipe, the contact portion between the branch part and the cover body and the fluid pipe is heated by the heating part.

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