JP5000448B2 - Covering material heat sealer for pipe members - Google Patents

Description

  The present invention is, for example, a fluid used for joining two heat insulating materials separated on both sides in the longitudinal direction of an inner pipe in a fluid pipe with a heat insulating material such as an air conditioning pipe whose outer surface is covered with a heat insulating material. The present invention relates to a pipe member covering material heat fusion tool such as a heat insulating material heat fusion tool for pipe.

Conventionally, in an air conditioner, when the refrigerant passing through the pipe changes more rapidly than the ambient temperature during operation, particularly when the temperature drops below the dew point, condensation may occur on the outer surface of the pipe. In order to prevent this dew condensation, a pipe covered with a cylindrical heat insulating material is constructed in accordance with the structure of the building. During the construction, the tubes may be connected to each other, and the heat insulating materials are also joined at the time of the connection. For example, in the following Patent Document 1, a seam sheet is wound around a seam between heat insulating waterproof sheets. In general, in a fluid pipe with a heat insulating material having dew condensation prevention means, as shown in FIG. 5, the outer surface 28a of the inner pipe 28 is covered with a heat insulating material 27 made of foamed polyethylene or the like, An adhesive tape 30 is wound around the outer periphery of the opposite end surfaces 27a at the joint 29 between the end surfaces 27a of the divided heat insulating materials 27.
JP 2001-50481 A

  However, when the heat insulating material 27 contracts due to a construction error or a change with time after the construction, the adhesive tape 30 is peeled off, and a gap is formed in the joint 29 between the two heat insulating materials 27. The surface 28a may be exposed and condensation may occur there. If the condensed water leaked into the building, it caused water leakage.

  In view of this, the present applicant, in an application filed on April 6, 2006 (Japanese Patent Application No. 2006-105376), heats the opposite end surfaces of the two heat insulating materials divided on both sides in the longitudinal direction of the inner pipe by means of a heating member. The present invention provides a heat insulating material heat fusion tool for a fluid pipe that is used when a seam joined by bonding is provided.

  In addition to such a heat insulating material heat fusion tool for fluid pipes, the present invention provides both covering materials divided on both sides in the longitudinal direction of the inner pipe among the covering materials covering the outer surface of the inner pipe of the pipe member other than the fluid pipe For various pipe member sheathing and heat-sealing tools used for joining the pipes, the heating surface of the heating element is protected and improved so that it is difficult to touch the heating surface inadvertently. The purpose is to improve the usability of the coating material heat fusion tool.

The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 to 4) of the embodiments described later.
The covering material heat-sealing tool for pipe members such as the heat insulating material heat-sealing tool for fluid pipes according to the invention of claim 1 is configured as follows.

  Heating members 5 and 8 having a pair of heating bodies 6 and 9 that are supported by the mounting portion 1a so as to be relatively rotatable and are opened and closed with each other. In the closed state Q in which both the heating bodies 6 and 9 are closed, the split edge 11 between the both heating bodies 6 and 9 facing each other in the rotation direction R around the rotation center line 4a in the mounting portion 1a. Forms a split hole 12 and an insertion hole 20 in the split hole 12. In both the heating bodies 6 and 9 in the closed state Q, at least one side surface 21 of both side surfaces 21 formed on the outer periphery of the insertion hole 20 on both sides in the center line direction Y of the insertion hole 20 is heated by the heating means 22. A heating surface for generating heat is provided. A stopper 24 projecting from the outer peripheral surface 25 side connecting the both end portions 11a, 11b of the split edge portion 11 of both the heating bodies 6, 9 to the heating surface side of the side surface 21 is provided, and the side surface 21 is provided inside the stopper 24. A heating surface is provided.

  According to the first aspect of the present invention, when the covering members 27 divided by the covering member pipes M1 and M2 in which the outer surface 28a of the inner tube 28 is covered with the covering member 27 are joined together, the heating members 5 and 8 are closed. In the state Q, the inner tube 28 is fitted into the insertion holes 20 of the heating bodies 6 and 9, and the side surfaces 21 of the heating bodies 6 and 9 are applied to the end surface 27a of the covering material 27 as the heating surface to melt the end surface 27a. Can do.

  In particular, even when an object is brought close to the side surface 21 of the heating elements 6 and 9, the object abuts against the stopper 24 and is less likely to contact the side surface 21, so that the heating surface of the side surface 21 can be protected. It becomes difficult to touch carelessly. In that case, since the heating surface of the side surface 21 is disposed inside the stopper 24, the end surface 27 a of the covering material 27 can be easily applied to the heating surface of the side surface 21.

  In both the heating members 5 and 8 according to the invention of the second aspect based on the invention of the first aspect, one of the pair of arms 2, 3, 7, and 10 supported by the mounting portion 1a so as to be relatively rotatable. One heating body 6 is supported by the arms 2 and 7, and the other heating body 9 is supported by the other arms 3 and 10. The stopper 24 extends from the arms 7 and 10, and the heating bodies 6 and 6 are supported. 9 along the outer peripheral surface 25. In the invention of claim 2, the stopper 24 can be easily formed by using the arms 7 and 10 for supporting the heating bodies 6 and 9.

  In the invention of claim 3 based on the invention of claim 1 or claim 2, the stopper 24 is provided over the entire outer peripheral surface 25 between both end portions 11a, 11b of the split edge portion 11 by both heating bodies 6, 9. It has been. In the invention of claim 3, the function as the stopper 24 that protects the heating surface of the side surface 21 and makes it difficult to carelessly touch the side surface 21 can be performed over the entire outer peripheral surface 25 of the heating bodies 6 and 9.

  In the invention of claim 4 based on the invention of claim 3, the stopper 24 continuously forms a ring in the closed state Q of both the heating elements 6, 9 and surrounds the heating surfaces of the side faces 21. In the invention of claim 4, the heating surface of the side surface 21 can be surrounded and protected inside the annular stopper 24.

  In the invention of claim 5 premised on the invention of any one of claims 1 to 4, the stopper 24 has a heating surface 21 located inside the stopper 24 from the outside of the stopper 24. It has a visual recognition means (for example, visual recognition hole 26a) which can be visually recognized through the stopper 24. In the invention of claim 5, the end surface 27 a of the covering material 27 can be easily applied to the heating surface 21 while visually recognizing the heating surface 21 of the heating bodies 6 and 9 from the outside of the stopper 24.

  In the invention of claim 6 premised on the invention of claim 2, the mounting portion 1a is provided in the holder 1, and the holder 1 has an opening / closing operation means 13 for opening and closing the arms 2, 3, 7, and 10 with each other. Is provided. According to the sixth aspect of the present invention, when the holder 1 is gripped and the opening / closing operation means 13 is operated, both the heating elements 6 and 9 can be opened and closed with each other, and the fusing operation is facilitated.

  The present invention provides a tubular member covering material heat fusion tool for easily melting the end surface 27a of the covering material 27 in order to manufacture the tube members M1 and M2 in which the gap 29 between the covering materials 27 is less likely to cause a gap. In addition to being able to do this, the function of the stopper 24 makes it difficult for objects to come into contact with the side surface 21 and protects the heating surface of the side surface 21 and makes it difficult to touch the side surface 21 carelessly. The usability of the coating material heat fusion tool can be improved.

Hereinafter, a heat insulating material heat fusion tool for fluid pipes according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the fixed support arm 2 is attached and positioned in the head 1 a (attachment portion) of the holder 1, and the movable support arm 3 is located above the fixed support arm 2. Is supported by the support shaft 4 so as to be rotatable in the vertical direction Z. In the lower heating member 5 shown in FIGS. 1 and 2, a fixed heating body 6 is supported by a fixed connection arm 7, and the fixed connection arm 7 is detachably connected to the fixed support arm 2. In the upper heating member 8 shown in FIGS. 1 and 2, a movable heating body 9 is supported by a movable connecting arm 10, and the movable connecting arm 10 is detachably connected to the movable supporting arm 3.

  Outside the front-rear direction X with respect to the head 1a (mounting portion) of the holder 1, the lower heating member 5 is disposed on the extending direction (downward) side of the gripping portion 1b that is bent from the head 1a and extends downward. The fixed heating body 6 is provided, and the upper heating member 8 is provided with the movable heating body 9 disposed on the opposite side (upward direction) to the extending direction. Each of the fixed heating body 6 and the movable heating body 9 has a plate shape having a semicircular outer peripheral edge. A semicircular split hole 12 is formed in the split edge portion 11 of the fixed heater 6 and the movable heater 9 facing each other in the rotation direction R around the rotation center line 4 a of the support shaft 4.

  In the opening / closing operation means 13 (link mechanism) assembled in the holder 1, an operation lever 14 adjacent to the gripping portion 1b on the outside thereof is supported so as to be rotatable around a support shaft 15, and the movable support arm. 3, the interlocking link 17 is rotatably supported by the interlocking shaft 16 supported on both sides in the left-right direction Y, and the interlocking lever 18 that rotates integrally with the operation lever 14 and the interlocking link 17 include The interlocking shafts 19 are connected to each other so as to be rotatable. Therefore, when the operating lever 14 is pushed toward the gripping portion 1b against the elastic force of the spring 15a, the movable support arm 3 moves the rotation center line 4a of the support shaft 4 via the interlocking lever 18 and the interlocking link 17. The movable heating body 9 is rotated upward with respect to the center, and the movable heating body 9 is rotated upward with respect to the fixed heating body 6 so that the upper and lower heating members 8 and 5 are opened to each other. When the operating lever 14 is released, the operating lever 14 is restored by the elastic force of the spring 15 a, and the movable support arm 3 moves along the rotation center line 4 a of the support shaft 4 via the interlocking lever 18 and the interlocking link 17. The movable heater 9 is rotated downward about the center, the movable heater 9 is rotated downward with respect to the fixed heater 6, and the upper and lower heating members 8, 5 are closed to each other.

  In the closed state Q of the upper and lower heating members 8, 5, the fixed heating body 6 and the movable heating body 9 are superposed on each other at the split edge portion 11 to form a disk shape, and the fixed heating body 6 and the movable heating body 9 An annular (circular) insertion hole 20 is formed by the split hole 12 of the split edge portion 11 at the central portion therebetween. In the fixed heating body 6 and the movable heating body 9, the semicircular side surface 21 is formed of a metal that is easy to heat on the entire outer periphery of the insertion hole 20 on both sides in the center line direction (left-right direction Y) of the insertion hole 20. ing. As shown in FIG. 1C, a sheet 21a coated with a resin having good separability with respect to the surface to be heated, such as a fluororesin or a silicone resin, is attached to both side surfaces 21. Further, the both side surfaces 21 may be coated with a resin having good separability with respect to the heated surface, such as a fluororesin or a silicone resin. A heater 22 as a heating means is fitted in the fixed heating body 6 and the movable heating body 9, and both side surfaces 21 generate heat by the heater 22 and function as heating surfaces. In addition, a switch 23a is attached to the grip 1b of the holder 1 on the side opposite to the operation lever 14, and when the grip 1b is gripped and the switch 23a is pushed with a finger, the heater 22 is turned on, and the grip 1b is turned on. When released together with the switch 23a, the switch 23a is turned off and the heater 22 and the like are turned off.

  In the open state P of the upper and lower heating members 8, 5, the split edge portions 11 of the fixed heater 6 and the movable heater 9 are separated from each other, and the split holes 12 that form the insertion holes 20 in the closed state Q are also mutually connected. It is possible to form an insertion / removal-permitted space S between the split edge portions 11 at a distance.

  In the upper and lower heating members 8 and 5, the stopper 24 formed integrally from the fixed connecting arm 7 and the movable connecting arm 10 is provided between the both ends 11 a and 11 b of the split edge portion 11 by the fixed heating body 6 and the movable heating body 9. The belt 26 has a band 26 extending along the outer peripheral surface 25 linking the outer peripheral surface 25 and projecting from the outer peripheral surface 25 side to the both side surfaces 21, and the fixed heating body 6 and the movable heating body 9 are closed. Q forms a continuous annular shape and surrounds both side surfaces 21.

Next, a fluid pipe with a heat insulating material joined by using the heat insulating material heat fusion tool for fluid pipe according to the present embodiment and a joining procedure thereof will be described with reference to FIGS.
As shown in FIG. 3 (a), a tube member in which an outer surface 28a of an inner tube 28 made of resin, copper or the like is covered with a heat insulating material 27 as a cylindrical covering material made of a heat insulating material such as polyethylene foam. The fluid pipes M1 and M2 are divided on both sides of the inner pipe 28 in the longitudinal direction. By opening a gap G between the outer surface 28a of the inner tube 28 and the inner peripheral surface of the heat insulating material 27, the inner tube 28 can be easily inserted into the heat insulating material 27 at the expanded portion or the bent portion. When these fluid pipes M1 and M2 are connected to each other, first, as shown in FIG. 3 (b), the heat insulating material 27 is moved in the longitudinal direction with respect to the inner tube 28 so that the two heat insulating materials 27 face each other. While separating the end surfaces 27a from each other, the inner pipes 28 exposed between the heat insulating materials 27 are connected to each other. Next, as shown in FIGS. 2 (a) and 2 (b), the upper and lower heating members 8, 5 of the heat-sealing tool are in the open state P, and between the split edges 11 of the fixed heater 6 and the movable heater 9. After the inner tube 28 is inserted into the insertion / removal space S, when the upper and lower heating members 8 and 5 are brought into the closed state Q as shown in FIGS. 1 (a) and 1 (b), the inner tube 28 is fitted into the insertion hole 20. It is. Thereafter, as shown in FIG. 3C, both the heat insulating materials 27 are moved to the inside of the left and right belt bodies 26 that form an annular shape by the upper and lower stoppers 24, and both side surfaces 21 of the fixed heating body 6 and the movable heating body 9. When the end surfaces 27a of the two heat insulating materials 27 are pressed against the (heating surface), the end surfaces 27a are simultaneously heated and melted. Next, when the upper and lower heating members 8 and 5 are opened P, and the inner tube 28 is removed from the insertion / removal allowable space S between the split edge portions 11 of the fixed heating body 6 and the movable heating body 9, FIG. ), The end surfaces 27a of the two heat insulating materials 27 in the molten state oppose each other in the longitudinal direction. When the end surfaces 27a of the two heat insulating materials 27 in the molten state are pressed against each other immediately after the upper and lower heating members 8 and 5 of the heat fusion tool are removed from the end surfaces 27a of the two heat insulating materials 27 in this way, FIG. As shown in FIG. 2, the both end surfaces 27a are heat-sealed and joined to each other, and a seam 29 is formed on the entire outer periphery of the inner tube 28 by heat-sealing. A pair of switches 23b that can be pushed by the hand when operating the operating lever 14 are juxtaposed in the left-right direction Y on the side adjacent to the operating lever 14 in the gripping portion 1b of the holder 1 so that the fusion work is started. When one of the switches 23b is pressed according to the thickness of the heat insulating material 27, one of the two types of fusion work time (for example, 5 seconds when the thickness is small or 10 seconds when the thickness is large) is fused. After finishing the counting of the wearing work time, the process is finished, and after confirming that, the fusion work is finished.

  In another example of the present embodiment shown in FIG. 1D, a large number of viewing holes 26a are arranged vertically and horizontally as viewing means in the entire left and right belt bodies 26 of the stopper 24 so as to penetrate between the inside and outside of the stopper 24. Has been. The heating surface 21 inside the stopper 24 can be visually recognized from the outside of the stopper 24 through each viewing hole 26a.

  A pouch 31 shown in FIGS. 6 and 7 is used for storing the heat insulating material heat fusion tool for fluid pipes, and includes a case main body 32 and a cover 33 formed of a flexible material. The cover 33 can open and close an entrance / exit 32 a formed at the upper end of the case body 32. In the case main body 32, both the heating members 5 and 8 of the fluid pipe heat insulating material heat fusion tool and the head 1a of the holder 1 are housed in a heat-resistant bag 34 attached to the peripheral edge of the entrance / exit 32a. The gripping portion 1b of the holder 1 is exposed from the bag 34, and an inner case 35 is accommodated below the gripping portion 1b, and the spare heating members 5 and 8 separated from the holder 1 are accommodated in the inner case 35. The The case body 32 is provided with a front pocket 36, and an electric wire cord 37 drawn to the outside of the case body 32 from the grip 1 b of the holder 1 of the heat-sealing tool accommodated in the case body 32 is provided in the front pocket 36. Be contained. A cushion portion 38 is provided on the rear side of the case main body 32. When the shoulder belt 39 attached to the case main body 32 is hooked on the shoulder, the cushion portion 38 hits the outer side of the thigh. Band-shaped hook-and-loop fasteners 40 are attached to both sides of the cover 33, and the pouch 31 can be supported by winding the hook-and-loop fastener 40 around a rod 41 at the work site. A hook ring 42 is detachably attached to both sides of the upper portion of the cushion portion 38 and can be hooked on the waist belt 43 to support the pouch 31.

This embodiment has the following effects.
* When an object is brought close to the side surface 21 of the heating elements 6 and 9, the object abuts against the stopper 24 and is less likely to contact the side surface 21, and the heating surface of the side surface 21 can be protected.

* When a hand is brought close to the side surface 21 of the heating elements 6, 9, the hand comes into contact with the stopper 24 and is less likely to come into contact with the side surface 21, making it difficult to touch the side surface 21 carelessly.
* The end surface 27a of the heat insulating material 27 can be easily applied to the heating surface 21 while visually recognizing the heating surface 21 of the heating elements 6 and 9 from the outside of the stopper 24 through the visual recognition holes 26a.

  * If the above heat fusion tool is used, the end surfaces 27a of the two heat insulating materials 27 are thermally fused and joined to each other, so that the end surfaces 27a are difficult to separate from each other, and the seam 29 between the two heat insulating materials 27 is formed. A gap is less likely to occur. Therefore, condensation is unlikely to occur on the outer surface 28a of the inner tube 28, and the occurrence of water leakage can be prevented. At the seam 29, the end surfaces 27a of the heat insulating materials 27 are heat-sealed over the entire outer periphery of the inner tube 28, so that a gap is less likely to occur.

  * Since the inner tube 28 is fitted into the insertion hole 20 in the closed state Q of the fixed heater 6 and the movable heater 9, the fixed heater 6 and the movable heater 9 are stably held with respect to the inner tube 28. The fixed heating body 6 and the movable heating body 9 can be applied to the end surfaces 27a of the two heat insulating materials 27 to melt the end surfaces 27a, thereby facilitating the fusion work.

  * When the holder 1 is gripped and the opening / closing operation means 13 is operated, the fixed heating body 6 and the movable heating body 9 can be opened and closed with respect to each other without directly touching the fixed heating body 6 and the movable heating body 9. It becomes easy to do.

For example, the following embodiment may be configured as follows.
A stopper is directly projected from the outer peripheral surface 25 of the fixed heating body 6 and the movable heating body 9.
A stopper 24 is formed along a part of the entire outer peripheral surface 25 of the fixed heating body 6 and the movable heating body 9. For example, instead of the belt body 26 of the stopper 24, the stopper 24 is formed in a tooth shape, and each tooth portion of the stopper 24 is arranged along the outer peripheral surface 25.

As a visual recognition means that can see the inner space from the outside of the stopper 24, the stopper 24 is made transparent instead of the visual recognition hole 26a.
The visual recognition hole 26a of the stopper 24 is not limited to an annular hole, and may be a notch recess.

  -In the said embodiment, the holder 1 is provided with the head 1a which has the attaching part which supported the heating members 5 and 8, and the holding part 1b which bends and extends from the head 1a, and a heating body is the head. The fixed heating body 6 is supported by the mounting portion 1a so as not to be rotatable, and the movable heating body 9 is supported so as to be rotatable so as to open and close the fixed heating body 6. Is disposed on the extending direction side of the grip portion 1b, and the movable heating body 9 is disposed on the opposite side to the extending direction. Instead of this configuration, the heating body 9 of the upper heating member 8 may be fixed and the heating body 6 of the lower heating member 5 may be rotated, or the heating bodies 6 and 9 may be rotated together. .

As the opening / closing operation means 13 for the heating members 5, 8, a finger pad that can open and close the heating bodies 6, 9 is provided instead of the link mechanism described above.
In the embodiment, the heating bodies 6 and 9 of the heating members 5 and 8 have a circumferential angle of 180 degrees, but the heating bodies 6 and 9 may be formed at a circumferential angle of 90 degrees, for example. In that case, the insertion hole 20 formed between the heating bodies 6 and 9 in the closed state Q becomes a space opened to the outside, and the inner tube 28 inserted in the space is sandwiched between the heating bodies 6 and 9. The heating members 5 and 8 are rotated in a state where the heating surface 21 of the heating bodies 6 and 9 is applied to the end surface 27a of the heat insulating material 27 to melt the end surface 27a.

  As the heating means in the heating members 5 and 8, any heating means can be used as long as it can heat the heating surface 21 of the heating bodies 6 and 9 instead of the heater 22 by the heat ray. Hot air by gas can be ejected from many small holes, or the power source of the heater 22 can be a battery. Further, a paste made of tungsten or molybdenum powder and printed almost uniformly on the entire surface of alumina is adopted as a resistor in place of the heat ray.

  As shown in FIG. 3A, the fluid pipes M1 and M2 in which the outer surface 28a of the inner pipe 28 is covered with a cylindrical heat insulating material 27 are divided on both sides in the longitudinal direction of the inner pipe 28. The tube 28 may be connected in series in the longitudinal direction, and only the heat insulating material 27 may be divided on both sides in the longitudinal direction.

(A) is the right view which shows the closed state of both the upper and lower heating members in the heat insulating material heat fusion tool for fluid pipes according to this embodiment, and (b) is a partially cutaway right view of (a). (C) is a fragmentary sectional view which shows only an up-and-down both heating member seeing (a) from the front side, (d) is a fragmentary perspective view which shows another example of an up-and-down both heating member. (A) is a right view which shows the open state of both the upper and lower heating members in the heat insulating material heat fusion tool for fluid pipes concerning this embodiment, (b) is a partially cutaway right view of (a). . (A), (b), (c), and (d) show the process of joining the separated fluid pipes with a heat insulating material together from the front side by using the heat insulating material heat sealing material for fluid pipes of this embodiment. It is a partial longitudinal cross-sectional view. It is a longitudinal cross-sectional view which shows a part of fluid pipe | tube with a heat insulating material concerning this embodiment. It is a longitudinal cross-sectional view which shows a part of conventional fluid pipe | tube with a heat insulating material. (A) is a front view in the pouch which stores the said heat insulation material heat insulation material for fluid pipes, (b) is a back view similarly, (c) is a left view similarly. (A) is sectional drawing which looked at the above-mentioned porch from the front side, (b) is a use state figure which hooked the above-mentioned porch on the shoulder, and (c) hooked the above-mentioned porch on the rod of the work site It is a use state figure, (d) is a use state figure which hooked the above-mentioned pouch on a waist belt.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Holder, 1a ... Head as attachment part of holder, 2 ... Fixed support arm, 3 ... Movable support arm, 4a ... Rotation center line of upper side heating member, 5 ... Lower side heating member, 6 ... Fixed heating body , 7 ... fixed connecting arm, 8 ... upper heating member, 9 ... movable heating element, 10 ... movable connecting arm, 11 ... split edge part, 11a, 11b ... both ends of the split edge part, 12 ... split hole, 13 ... opening and closing Operation means, 20 ... insertion hole, 21 ... side surface (heating surface) of heating body, 22 ... heater as heating means, 24 ... stopper, 25 ... outer peripheral surface, 26a ... viewing hole as visualizing means, P ... both heating bodies Open state, Q: closed state of both heating elements, Y: center line direction of the insertion hole, R: rotation direction of the upper heating member.

Claims (6)

A heating member having a pair of heating bodies that are supported by the mounting portion so as to be relatively rotatable and that can be opened and closed with each other, and in the closed state in which both the heating bodies are closed to each other, rotation about the rotation center line in the mounting portion. A split hole is formed in the split edge portion between the two heating elements facing each other in the direction, and an insertion hole is formed in the split hole. In both heating elements in the closed state, both sides of the insertion hole in the center line direction At least one of the two side surfaces formed on the outer periphery of the insertion hole is provided with a heating surface that generates heat by the heating means, and the side surface from the outer peripheral surface connecting both ends of the split edge portions of the two heating bodies is provided. A pipe member covering material heat-sealing tool, wherein a stopper projecting toward the heating surface is provided, and the heating surface of the side surface is disposed inside the stopper. One heating body is supported by one arm of the pair of arms supported by the mounting portion so as to be relatively rotatable in the heating member, and the other heating body is supported by the other arm. The pipe member covering material heat-sealing tool according to claim 1, wherein the pipe member covering material heat-sealing tool extends from an arm and extends along an outer peripheral surface of the heating body. The said member is provided over the whole outer peripheral surface between the both ends of a split edge part by both heating bodies, The coating | covering material heat fusion tool for pipe members of Claim 1 or Claim 2 characterized by the above-mentioned. The pipe member covering material heat-sealing tool according to claim 3, wherein the stopper is continuously annular with each other in a closed state of both heating bodies, and surrounds the heating surfaces on both sides. The said stopper has a visual recognition means which can visually recognize the heating surface inside the stopper through the stopper from the outer side of the stopper, The any one of Claims 1-4 characterized by the above-mentioned. The covering material heat-sealing tool for pipe members according to claim. The tube member covering material heat-sealing device according to claim 2, wherein the attachment portion is provided in a holder, and the holder is provided with an opening / closing operation means for moving the arms to open and close each other.

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