JP2009002402A - Compressively caulked pipe joint and method for compressively caulking pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressively caulked pipe joint which is excellent in visibility even when used for a ceiling pipe or the like although it has a simple structure, which certainly prevents a failure in caulking, and besides, which is excellent in workability. <P>SOLUTION: In this compressively caulked pipe joint, the end of a pipe 15 is inserted between a nozzle portion 14 arranged at one end of the pipe joint and a sleeve 2 arranged to surround the nozzle portion 14, and also the sleeve 2 is caulked and compressed to thereby watertightly sandwiching the pipe 15 between the sleeve 2 and the nozzle portion 14. A visual thin belt member 4 which is different from the peripheral surface 3 of the sleeve 2 in color, torn when caulked, and removed, is previously wound around the sleeve 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a compression caulking pipe joint and a pipe joint compression used for installation work of equipment pipes such as water / hot water pipes and cold / hot water pipes for cooling and heating in multi-layer buildings such as middle- and high-rise apartment buildings and commercial buildings. It relates to the caulking method.

  Conventionally, as compression crimped fittings, there are compression crimped joints that demonstrate watertightness by compression crimping with a dedicated tool, and the structure has been simplified on the premise of using a dedicated tool, especially when used in large quantities. , Cost benefits can be demonstrated.

  At the site of compression caulking type pipe joints, it is often the case that construction work is divided into a pipe laying group and a work group, but if you forget to caulk, a water leakage accident will occur during the water pressure test, so be sure. It is important to make sure that you do not forget to squeeze.

However, it is difficult to see caulking traces in ceiling piping at sites with high ceilings.Also, there are methods to put a confirmation mark or sign with an oil pen to improve visibility after compression, but the work man-hours will increase. Hated.
Therefore, for example, the pressure-sensitive or heat-sensitive colored piece attached to the fitting joint (joint part) of the compression crimped fitting (press-type fitting) is colored by the pressure and heating accompanying the press work, In particular, those in which both or one or both of the developer and the color former are microencapsulated, ruptured by pressurization, and both agents come into contact with each other and develop color by chemical change are known (for example, see Patent Documents 1, 2, and 3). ).

JP 2004-84713 A JP 2004-116554 A JP 2004-138169 A

  However, with regard to the color seal of the conventional compression caulking pipe joint, it is necessary to align and press the color seal on the tightening portion of the dedicated tightening tool, so that workability is poor. Further, if the joint is stored in a place exposed to sunlight, the color development may be deteriorated, and it is difficult to maintain the quality. In addition, mainly due to cost problems, it is difficult to form a large coloring sticker, and it may be difficult to confirm that the ceiling piping has been forgotten to be caulked from the floor.

  Therefore, the present invention has been made in view of the above-described problems, and has a simple structure and is excellent in visibility even when used for a ceiling pipe or the like, and reliably suppress forgetting caulking. Further, it is an object of the present invention to provide a compression staking pipe joint and a method of compressing and staking a pipe joint, which can reduce the number of man-hours on site and have excellent workability.

The compression caulking pipe joint according to the present invention includes a pipe end inserted between a nozzle portion provided at one end of the pipe joint and a sleeve arranged so as to surround the nozzle portion, and the sleeve is caulked. A compression caulking pipe joint in which the pipe is watertightly sandwiched between the sleeve and the nozzle portion by compressing, and the sleeve has a color different from the outer peripheral surface of the sleeve, and when the caulking is done, a tear is formed and removed. A thin ribbon member for visual recognition is wound in advance.
In addition, a perforation composed of a plurality of holes or a plurality of pores is formed in the ribbon member.

  Further, in the method of compressing and caulking a pipe joint according to the present invention, the end of the pipe is inserted between a nozzle part provided at one end of the pipe joint and a sleeve arranged so as to surround the nozzle part, A compression caulking method for a pipe joint in which a pipe is watertightly sandwiched between a sleeve and a nozzle portion by caulking and compressing the sleeve, wherein the sleeve has a color that is different from that of the outer peripheral surface of the sleeve. The band member is pre-wrapped, and by using a caulking tool, the sleeve is caulked from the outside to form a tear in the strip member, and the strip member is removed from the tear and the strip member is removed. This is a method for confirming that the caulking work is completed by looking at the sleeve.

  According to the compression caulking pipe joint of the present invention, if the operator peels off the strip member from the tear after caulking (remove), and sees that the strip member is removed from the sleeve in the subsequent inspection, etc., It can be visually confirmed that the caulking work has been completed. Further, since the ribbon member can be easily peeled off from the sleeve by the tear, the number of man-hours on the site is hardly increased and the workability is very good. Further, since the ribbon member is different from the color of the outer peripheral surface of the sleeve, it is easy to visually recognize it from a place distant from the floor.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show an embodiment of a compression caulking pipe joint of a pipe joint. Reference numeral 1 denotes a compression caulking pipe joint, which has a nozzle portion (an insertion tube portion) 14 provided at one end. Further, a metal sleeve (compression ring) 2 is arranged so as to surround the nozzle portion 14.

  The pipe joint 1 has an end portion of a pipe 15 inserted between the sleeve 2 and the nozzle portion 14, and a part of the peripheral wall of the sleeve 2 is caulked with a caulking tool 20 described later to reduce the diameter. Is compressed and deformed, and the compressed and deformed sleeve 2 compresses and deforms the pipe 15 at that portion. Then, the pipe 15 is sandwiched between the sleeve 2 and the nozzle portion 14 in a watertight manner so that the pipe 15 is prevented from coming off. The pipe 15 is a cross-linked polyethylene pipe used for hot water supply / air-conditioning pipes, a composite pipe of polyethylene and aluminum, or the like.

  Further, the ribbon member 4 is wound around the sleeve 2 in advance at a factory before shipment. The ribbon member 4 has a color with a large contrast (contrast) with respect to the outer peripheral surface 3 of the sleeve 2. For example, if the color of the outer peripheral surface 3 of the sleeve 2 is silver, it is preferable to use a color that has a large contrast with respect to silver and is easy to identify. Moreover, since the visual recognition work is often performed while standing on the floor and directing light toward the ceiling, it is preferable that the material is a material having a fluorescent color or a color that can reflect light.

  Further, the ribbon member 4 is a material having a cut structure that is easily torn in the axial center L direction of the pipe joint 1 and is made of a material with little variation in breaking strength due to moisture absorption or change with time. For example, vinyl tape, film , Paper, metal foil, metal vapor-deposited tape, metal vapor-deposited film, metal vapor-deposited paper and the like.

  The thin strip member 4 is wound without using an adhesive. If it carries out like this, it will become easy to peel off the strip member 4 from a tear. Further, the sleeve 2 has an outer flange portion 9 formed at the tip end (end edge portion on the pipe insertion side), and the wound ribbon member 4 is engaged with the outer flange portion 9 so that the sleeve 2 Dropping out is deterred. The outer flange portion 9 may be inclined instead of a plane orthogonal to the axial direction, and prevents the strip member 4 from falling off. Note that an adhesive may be applied to the back surface (inner peripheral surface) side of the ribbon member 4 and adhered around the sleeve 2. For example, if the adhesive is applied in the form of dots, the ribbon member After 4 is cut by caulking, it is preferable because it is easy to peel off.

  When the ribbon member 4 is torn by caulking by the caulking tool 20 and the operator removes the ribbon member 4 from the sleeve 2 from the slit, the caulking is surely performed when the patrol is performed after the work is finished. It can be easily visually discriminated whether or not. The thin strip member 4 is preferably not easily stretched in the circumferential direction so as to be easily broken.

  Here, the pipe joint 1 will be described. A packing housing groove 17 is formed on the outer peripheral surface of the nozzle portion 14 in a circumferential shape, and a sealing member (packing) for tightly contacting the inner peripheral surface of the inserted pipe 15 and stopping water in the groove 17. The outer ring 18 and the compression ring 19 are held. Further, on the outer peripheral surface of the nozzle portion 14, a concave groove 16 is formed on each of the distal end side and the proximal end side of the packing housing concave groove 17 so that the pipe 15 protrudes to the inner peripheral side by caulking.

  The strip member 4 shown in FIG. 4 has a width dimension D (in the direction of the axis L) shorter than that of FIGS. The width dimension D of the ribbon member 4 needs to have a size that can be identified when the piping on the ceiling is viewed from the floor, and D is set to 5 mm or more. If it is less than 5 mm, there is a possibility that it cannot be seen from a place 5 m away.

  Next, the thin strip member 4 shown in FIG. 5 is different from that shown in FIGS. 1 and 2 in that a plurality of holes 5 are formed in a dotted pattern. The hole 5 has a round shape, for example. By forming the hole 5, when crimped, the tear is continuous with the hole 5, and the strip member 4 can be easily peeled off from the sleeve 2.

  Further, in the thin strip member 4 shown in FIG. 6, a plurality of perforations (cuts) 7 formed by arranging a plurality of pores 6 parallel to the axial center L direction are arranged in parallel in the circumferential direction. In the thin strip member 4 shown in FIG. 7, the perforation 7 is formed in an oblique direction with respect to the direction of the axis L. Moreover, the perforation 7 is formed in circular arc shape in the thin strip member 4 shown in FIG. In any of the arrangements of FIGS. 6 to 8, the crevice formed when caulked and the pores 6 (perforations 7) are connected in a continuous manner, and the strip member 4 can be easily peeled off. The number of perforations 7 and the number of columns can be increased or decreased from those in the illustrated example.

Further, in the thin strip member 4 shown in FIG. 9, the hole 5 is a polygonal slit 8 such as a triangular shape, and the pair of slits 8 and 8 are formed side by side in the axial center L direction, and the circumferential direction A plurality of rows are formed at a predetermined pitch.
Further, in the thin strip member 4 shown in FIG. 10, holes 10 having a plurality of sharp cuts radially are formed at a plurality of points in a scattered manner. 9 and 10, the slit 8 formed when caulked is continuously connected and the strip member 4 can be easily peeled off. The shape, arrangement, and quantity of the slits 8 and the holes 10 can be increased or decreased from those in the illustrated example.

Next, the caulking tool 20 and caulking work will be described with reference to FIGS.
The caulking tool 20 includes two split dies 24 and 25 each having a caulking concave portion 22 having a substantially semi-cylindrical shape at the tip of a tool body 21 and provided with abutting surfaces 23 on both sides of the caulking concave portion 22. A die 26 is provided. Both split dies 24 and 25 are each provided with a substantially semi-circular caulking ridge 27 at a position facing the packing housing groove 17 and the groove 16 (see FIG. 13) of the pipe joint 1. Each caulking ridge 27 is provided so as to be positioned in the same plane as the caulking ridge 27 which is a pair of the other divided die 24 (25) in a state where the abutting surfaces 23 of both the divided dies 24 and 25 are abutted. ing. In each divided die 24 (25), both ends of the caulking ridge 27 are formed with small curved portions 29 continuous to the abutting surface 23 side, and in a state where both the divided dies 24 and 25 are abutted, The sharp bend portions 29 and 29 form sharp void portions 30 and 30 at the corners of the caulking recess portions 22 and 22, respectively.

  Then, one end portion of the pipe 15 is inserted between the nozzle portion 14 and the sleeve 2, the sleeve 2 is disposed at a position facing the caulking concave portion 22 of the two divided dies 24, 25, and then provided on the tool body 21. When the two operating dies 24 and 25 are moved relative to each other until the abutting surfaces 23 abut each other (see FIG. 12), the caulking ridges 27 and 27 cause the sleeve 2 to move the ribbon member 4 Caulking strongly toward the nozzle part 14 from the outside. The pipe 15 is compressed and deformed by a pair of semi-circular linear caulking portions 28 formed by caulking, and the pipe 15 is fixed between the sleeve 2 and the nozzle portion 14 in a watertight manner.

At this time, in the sleeve 2, sharp protrusions 11 and 11 are formed by the above-described pair of sharp gaps 30 and 30 from the distal end side to the proximal end side in the axial center L direction. The sharp protrusions 11 are formed as a pair at opposing positions in the radial direction.
Then, the sharp protrusion 11 cuts the thin strip member 4 in a straight line in the direction of the axis L from the front end to the base end, and a cut portion 4 a is formed in the thin strip member 4. Further, since the caulking ridges 27, 27 of the die 26 cut the thin strip member 4 in the circumferential direction, the thin strip member 4 is formed with an annular cut portion 4b (see FIG. 15). An operator tears and removes the thin strip member 4 by this tear.

As described above, since the ribbon member 4 is formed with the tearing portion 4a and the cutting portion 4b by the caulking operation, the operator can easily peel the ribbon member 4 from the tear after the caulking is completed.
If the strip member 4 is completely peeled off from the sleeve 2 when it is caulked, there is a possibility that the stripped strip member 4 may adhere to the die 26, and the next pipe joint is caulked. It must be removed before work, and there is a risk that it will hinder work. Therefore, it is preferable not to completely peel off, but to remain in the state of being attached to the sleeve 2 in the state of being cut off by the cut portion 4a and the cut portion 4b. That's fine. In this way, the work of peeling off the ribbon member 4 that has been cut after caulking is a work that requires very little labor, and therefore, the number of work steps is hardly increased and the workability is excellent.

In the case of the pipe joint 1 of FIG. 4, since the thin strip member 4 is short in the axial center L direction, it is easily cut by the sharp protrusion 11 of the sleeve 2 formed by caulking work, and can be easily peeled off.
Each of the thin strip members 4 shown in FIGS. 5 to 10 is formed with holes 5, perforations 7 and the like and has a reduced surface area, so that it is easily cut by the sharp protrusion 11 of the sleeve 2 and the workability is improved. improves. 6 to 8, if the above-described tearing portion 4a and cutting portion 4b coincide with or intersect with the perforation 7, it becomes easier to peel off. In addition, as for FIG. 10, if a plurality of sharp cuts become the starting points of the tearing portion 4a and the cutting portion 4b, it becomes easier to peel off and the working efficiency is improved.

  And since it is clear at a glance that the thin strip member 4 has been recovered from the pipe joint 1 by visual observation, it can be confirmed visually that the caulking work has been completed, and forgetting caulking can be prevented. And the danger of a water leak accident can be suppressed reliably. Further, since the thin strip member 4 before performing the caulking operation covers the sleeve 2 over the front circumference, it is easy to visually recognize that it is before caulking.

Further, the thin strip member 4 is made of an inexpensive material as described above, and the cost is low. Moreover, the thin strip member 4 can be set simply by being wound around the sleeve 2, and the manufacturing effort in a factory or the like is small.
In addition, the operator only has to caulk the pipe joint 1 using the caulking tool 20, and there is no need to press the colored seal and the dedicated tightening tool at the same position as in the above-mentioned patent document. Will not fall.

  As described above, the compression caulking pipe joint according to the present invention has the end of the pipe 15 between the nozzle part 14 provided at one end of the pipe joint 1 and the sleeve 2 arranged so as to surround the nozzle part 14. A compression caulking pipe joint in which the pipe 15 is watertightly sandwiched between the sleeve 2 and the nozzle part 14 by inserting and compressing the sleeve 2. Since the color of the surface 3 is different from that of the surface 3, and the visual strip member 4 is wound in advance when caulked and removed, the fissure is formed in the strip member 4 during caulking. The sleeve 2 from which the ribbon member 4 has been removed can be viewed from the floor or the like, and the completion of the caulking operation can be visually confirmed. And since an operator can peel off the thin strip member 4 easily from a rift, the man-hours on the site hardly increase and workability | operativity is very good. And it can be visually recognized from the floor whether or not the caulking work is completed. Moreover, since the ribbon member 4 is different from the color of the outer peripheral surface 3 of the sleeve 2, the ribbon member 4 is very excellent in visibility, can be surely confirmed whether or not the caulking work is completed, and can suppress forgetting caulking. In addition, since the thin strip member 4 can be wound around the sleeve 2 and set, the labor for manufacturing is small and the cost is low.

  Moreover, since the perforation 7 which consists of the several hole 5 (8) (10) or the several fine hole 6 is formed in the thin strip member 4, the crack by caulking is the hole 5, the perforation 7, etc. It spreads in a continuous manner, making it easier to peel off the ribbon member 4 and improving workability.

  In addition, the compression caulking method of the pipe joint according to the present invention is the end part of the pipe 15 between the nozzle part 14 provided at one end of the pipe joint 1 and the sleeve 2 arranged so as to surround the nozzle part 14. , And the sleeve 2 is crimped and compressed so that the pipe 15 is sandwiched between the sleeve 2 and the nozzle portion 14 in a watertight manner. A ribbon member for visual recognition 4 having a color different from that of the outer peripheral surface 3 is wound in advance, and a crimp is formed on the ribbon member 4 by caulking the sleeve 2 from the outside of the ribbon member 4 using a caulking tool 20. Then, the strip member 4 is removed from the tear, and the sleeve 2 from which the strip member 4 has been removed is viewed to confirm that the crimping operation has been completed, so a tear is formed in the strip member 4 during crimping. , Tear the ribbon member 4 Stripped from the eyes from the sleeve 2, a look at the sleeve 2 obtained by removing a thin band member 4 from the floor, or the like can visually recognize the caulking work is completed. And since an operator can peel off the thin strip member 4 easily from a rift, the man-hours on the site hardly increase and workability | operativity is very good. And it can be visually recognized from the floor whether or not the caulking work is completed. Moreover, since the ribbon member 4 is different from the color of the outer peripheral surface 3 of the sleeve 2, the ribbon member 4 is very excellent in visibility, can be surely confirmed whether or not the caulking work is completed, and can suppress forgetting caulking. In addition, since the thin strip member 4 can be wound around the sleeve 2 and set, the labor for manufacturing is small and the cost is low.

It is a perspective view showing one embodiment of a compression caulking pipe joint concerning the present invention. It is a front view. FIG. It is a front view which shows other embodiment of the compression crimping pipe joint which concerns on this invention. It is a front view which shows another embodiment of the compression crimping pipe joint which concerns on this invention. It is a front view which shows another embodiment of the compression crimping pipe joint which concerns on this invention. It is a front view which shows another embodiment of the compression crimping pipe joint which concerns on this invention. It is a front view which shows another embodiment of the compression crimping pipe joint which concerns on this invention. It is a front view which shows another embodiment of the compression crimping pipe joint which concerns on this invention. It is a front view which shows another embodiment of the compression crimping pipe joint which concerns on this invention. It is a front view which shows a crimping tool. It is a principal part expanded sectional front view which shows the state which faced | matched the face of division | segmentation dice. It is a semi-cross-sectional front view for explanation showing a state caulked with a caulking tool. It is AA sectional drawing of FIG. It is a front view which shows the pipe joint after caulking.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe joint 2 Sleeve 3 Outer peripheral surface 4 Thin strip member 5 Hole 6 Pore 7 Perforation 8 Hole (slit)
10 holes
14 Nozzle
15 Piping
20 Caulking tool

Claims (3)

The end portion of the pipe is inserted between the nozzle portion provided at one end of the pipe joint and the sleeve arranged so as to surround the nozzle portion, and the sleeve and the nozzle portion are compressed by caulking and compressing the sleeve. A compression caulking fitting that sandwiches the pipe in a watertight manner,
A compression caulking pipe joint, characterized in that a sleeve member for visual recognition, which is different in color from the outer peripheral surface of the sleeve and is wound in advance when it is caulked, is wound in advance.   The compression crimping pipe joint according to claim 1, wherein the ribbon member is formed with a plurality of holes or a perforation composed of a plurality of pores. The end portion of the pipe is inserted between the nozzle portion provided at one end of the pipe joint and the sleeve arranged so as to surround the nozzle portion, and the sleeve and the nozzle portion are compressed by caulking and compressing the sleeve. A method of compressing and caulking a pipe joint so that the pipe is sandwiched in a watertight manner,
A thin ribbon member for visual recognition having a color different from that of the outer peripheral surface of the sleeve is wound around the sleeve in advance,
Use a caulking tool to caulk the sleeve from the outside of the ribbon member to form a tear in the ribbon member, remove the ribbon member from the tear, look at the sleeve from which the ribbon member has been removed, and caulk A compression caulking method for a pipe joint, characterized by confirming that the work has been completed.

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