JP2012107723A - Pipe connecting device - Google Patents

Pipe connecting device Download PDF

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Publication number
JP2012107723A
JP2012107723A JP2010258173A JP2010258173A JP2012107723A JP 2012107723 A JP2012107723 A JP 2012107723A JP 2010258173 A JP2010258173 A JP 2010258173A JP 2010258173 A JP2010258173 A JP 2010258173A JP 2012107723 A JP2012107723 A JP 2012107723A
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Prior art keywords
connection
pipe
cylindrical
water stop
water
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JP2010258173A
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JP5714307B2 (en
Inventor
Hiroyuki Machida
浩之 町田
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Cosmo Koki Co Ltd
コスモ工機株式会社
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Priority to JP2010258173A priority Critical patent/JP5714307B2/en
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Abstract

The present invention provides a pipe connecting device in which an engaging part engages with a branch pipe without causing trouble due to entry of chips, and the branch pipe can be connected to the connecting part in a watertight manner.
A cylindrical body 17 includes an annular pressing portion 17a that presses a water stop member 23 toward the inside of a connecting portion 15 when the cylindrical body 17 is interposed between a punching machine 16 and an engaging portion 22. The connecting portion 15 includes an annular tapered portion 15g having an inclination that gradually decreases in diameter from the outer end 15c of the connecting portion 15 inward, and the tubular body 17 is stopped by being pressed by the pressing portion 17a. The water member 23 is further pressed toward the tube axis of the connection portion 15 by the taper portion 15g, so that the water member 23 is disposed on the substantially same tube axis as the connection portion 15.
[Selection] Figure 1

Description

  The present invention includes a covering section and a casing that cover a fluid pipe, and the casing is connected to the covering section and communicates with a branch port formed in the fluid pipe, and a punching machine that drills the branch port Alternatively, it is composed of a connection part that can be connected to the branch pipe in a watertight manner, and an on-off valve part that can communicate the communication part with the connection part, and is provided on the inner peripheral surface of the connection part and branches when the branch pipe is connected. An engagement portion that engages with the pipe, and is interposed between the perforator and the engagement portion when connected to the connection portion of the perforator, and the tip peripheral surface is closer to the on-off valve portion side than the engagement portion of the connection portion A cylindrical body that prevents entry of chips into the engaging portion by contacting the housing, and the cylindrical body is elastically deformed by being interposed between the drilling machine and the engaging portion. And an annular water stop member that is in watertight contact with the tubular body.
  A conventional pipe connection device includes a connection portion provided on an inner peripheral surface for engaging with a branch pipe when the branch pipe is connected, and a perforator is connected to the connection portion to provide a branch port for the fluid pipe. Perforated (see, for example, Patent Document 1).
Japanese Patent No. 4162063 (page 5, FIG. 5)
  However, in Patent Document 1, chips generated when a branching hole is drilled in a fluid pipe by a punching machine enters an engaging part that engages with a branching pipe provided in a connecting part. There is a problem that the chips remaining in the engaging portion are interposed between the branch pipe and the watertightness cannot be maintained.
  The present invention has been made paying attention to such a problem, and the engaging portion engages with the branch pipe without causing trouble due to the ingress of chips, and the pipe that can connect the branch pipe to the connecting portion in a watertight manner. An object is to provide a connection device.
In order to solve the above-mentioned problem, the pipe connection device of the present invention includes:
A casing having a covering portion and a casing covering the fluid pipe, the casing being connected to the covering portion and communicating with a branch port formed in the fluid pipe, and a punching machine for punching the branch port Or it is comprised from the connection part which can be connected watertightly to a branch pipe, and the on-off valve part which can connect the said communication part and the said connection part, It is provided in the internal peripheral surface of the said connection part, The said branch pipe An engaging portion that engages with the branch pipe when connected to the connecting portion, and is interposed between the punching device and the engaging portion when connected to the connecting portion of the drilling machine, and a tip peripheral surface of the connecting portion A cylindrical body that prevents the chips from entering the engagement portion by contacting the casing on the opening / closing valve portion side of the engagement portion, and the cylindrical body is engaged with the punching machine. An annular water stop member that is elastically deformed by being interposed between the connecting portion and the tubular body and that is in watertight contact with the connecting portion and the cylindrical body, An example was a tube connecting device,
The cylindrical body includes an annular pressing portion that presses the water stop member toward the inside of the connection portion when interposed between the drilling machine and the engagement portion, and the connection portion Is provided with an annular tapered portion having an inclination that gradually decreases in diameter from the outer end of the connecting portion inward, and the cylindrical body further includes a water-stop member pressed by the pressing portion by the tapered portion. By being pressed toward the tube axis of the connection portion, the tube is disposed on the tube axis substantially the same as the connection portion.
According to this feature, the water blocking member pressed by the pressing portion presses the cylindrical body further toward the tube axis of the connecting portion by interposing the cylindrical body between the drilling machine and the connecting portion. Therefore, the cylindrical body is automatically arranged on the substantially same tube axis as the connection portion, so that the tip peripheral surface of the cylindrical body does not need to be positioned closer to the on-off valve portion side than the engagement portion of the connection portion. It is possible to prevent chips from entering the engaging part when making a branching port with a drilling machine, and after the branching port is made, the engaging part does not cause a problem due to the entry of the cutting powder. Engage with the branch pipe and connect the branch pipe to the connecting portion while maintaining watertightness.
The pipe connecting device of the present invention is
An adhesion member is provided on a peripheral surface of the tip of the cylindrical body that contacts the casing.
According to this feature, just by pushing the cylindrical body toward the opening / closing valve portion side of the connecting portion, the contact member provided on the peripheral surface of the tip closely contacts the opening / closing valve portion side with respect to the engaging portion, and the chips enter. Can be easily prevented.
The pipe connecting device of the present invention is
A water stop lid that is an accessory of the drilling machine is attached to the outer end of the connection portion, and a communication path that can communicate with the outside of the connection portion is formed in the water stop lid. .
According to this feature, when the branch port is drilled by the punching machine, the generated chips can be discharged to the outside of the connecting portion through the communication path by opening the communication path formed in the water blocking lid. .
The pipe connecting device of the present invention is
The drilling machine is configured integrally with the water stop lid, and includes a plurality of vibration preventing members that prevent vibration of the drilling machine by connecting the water stop lid from the outside to the connection portion. It is characterized by.
According to this feature, the perforator can be attached at the same time by attaching a water stop lid to the outer end of the connection portion, and the vibration preventing member prevents vibration of the perforator, so a branch port is provided. In doing so, it is possible to eliminate the possibility that the diverging port is not formed by being displaced and the inside of the connecting portion is damaged.
The pipe connecting device of the present invention is
The water stop member includes a soft portion pressed in the tube axis direction of the connection portion by the tapered portion, a hard portion configured to be harder than the soft portion, and pressed toward the fluid pipe by the press portion, It is characterized by comprising.
According to this feature, when the cylindrical body is interposed between the drilling machine and the connecting portion, the soft portion that elastically deforms between the connecting portion and the cylindrical body is placed outside the connecting portion by the hard portion. Since it can be pressed so as not to bulge, not only can the water tightly stop between the connecting part and the cylindrical body, but also the hard part can be pressed without being relatively elastically deformed. Since the soft part can be elastically deformed flexibly between the connection part and the cylindrical body while being pressed by the part, it is possible to increase the accuracy with which the cylindrical body is disposed on the substantially same tube axis as the connection part. .
It is a sectional side view which shows the pipe connection apparatus in Example 1. FIG. It is a sectional side view which shows the state which has pierced the fluid pipe | tube. It is a sectional side view which shows the state which removes a cylindrical body from a connection part. (A) is a partial sectional side view of a cylindrical body, (b) is a rear view of a cylindrical body. It is a sectional side view which shows the state which connected the branch pipe to the connection part. It is a sectional side view which shows the pipe connection apparatus in Example 2. It is AA sectional drawing of the drilling machine in FIG. It is a sectional side view which shows the pipe connection apparatus in Example 3.
  EMBODIMENT OF THE INVENTION The form for implementing the pipe | tube connection apparatus which concerns on this invention is demonstrated below based on an Example.
  The pipe connection device according to the first embodiment will be described with reference to FIGS. 1 to 3 and 5 will be described as the front (front) side of the pipe connecting device. As shown in FIG. 1, a predetermined limit amount with the fluid pipe 1 in a state where the pipe connecting device 10 maintains water tightness on the outer peripheral surface of the existing fluid pipe 1 made of ductile cast iron or the like buried in the ground. It is mounted in a state that allows relative movement. The pipe connection device 10 includes a casing 12 that can be divided into two in the radial direction and a separate covering portion 11. The pipe connection device 10 is not limited to two divisions, and may be divided into a plurality of divisions such as three divisions. In the present embodiment, the fluid in the fluid pipe is clean water, but the fluid flowing in the fluid pipe 1 is not necessarily limited to clean water, and may be, for example, industrial water, or a gas or gas-liquid mixed state. It may be a fluid pipe through which the fluid flows.
  The casing 12 is formed by integrally connecting a communication portion 13, an on-off valve portion 14, and a connection portion 15 in order from the fluid tube 1 side, facing outward at substantially right angles to the tube axis. Note that at least one of the communication unit 13, the on-off valve unit 14, and the connection unit 15 may be provided separately from the others. The communication part 13 and the connection part 15 can communicate with each other by the on-off valve part 14 and have an internal structure that extends in the axial direction of the branch port 1 a formed in the fluid pipe 1. The communication part 13 has an opening edge 13a that opens toward the covering part 11 side, and the opening area of the opening edge 13a is continuous with the opening area on the on-off valve part 14 side. The casing 12 constituting the communication part 13, the on-off valve part 14, and the connection part 15, and the covering part 11 are connected to each other by bolts and nuts 30 through water-stop members 31 and 32 disposed between the opposing surfaces. The fluid pipes 1 are assembled with each other.
  As described above, the casing 12 and the covering portion that constitute the communication portion 13 in a state where the opening edge 13a of the communication portion 13 and the opening edge of the branch port formed in the fluid pipe 1 as described later are easily aligned. 11 can be connected to the fluid pipe simply by assembling.
  The on-off valve portion 14 can be opened and closed between the communication portion 13 and the connection portion 15 by a valve body 14a that moves up and down by a turning operation of the valve shaft 14b.
  On the inner peripheral surface of the connecting portion 15, an annular groove 15a is formed in which the lock ring 22 as the engaging portion of the present invention that engages with the branch pipe 40 (see FIG. 5) connected to the connecting portion 15 is installed. Has been. Further, the taper according to the present invention is formed on the inner diameter side of the outer end 15c that is the inner peripheral surface of the connection portion 15 so as to gradually decrease in diameter toward the fluid pipe 1 that is the inner side of the connection portion 15 from the outer end 15c. A tapered surface 15g as a part is formed. Furthermore, a parallel surface 15h that is substantially parallel to the tube axis of the connection portion 15 is formed inwardly of the tapered surface 15g to the rear portion of the connection portion 15 rather than the annular groove 15a. Further, the outer end 15c, which is the rear end portion of the connection portion 15, is formed on an orthogonal surface substantially orthogonal to the tube axis of the connection portion 15, and the outer end 15c is directed toward the outer diameter direction of the connection portion 15. A bulging flange 20 is formed.
  Next, drilling of the branch port 1a in the fluid pipe 1 using the pipe connecting device 10 will be described.
  As shown in FIGS. 1 and 2, first, the structure when the branch port 1 a is drilled will be described. A substantially cylindrical tubular body 17 is inserted into the connection portion 15. As shown in FIGS. 4 (a) and 4 (b), the cylindrical body 17 is provided with a close contact member 26 made of an elastic material such as rubber on the front peripheral surface of a body cylinder made of a metal material such as ductile cast iron. In addition, a flange portion 17a protruding in the outer diameter direction is formed at the rear end. This collar part 17a comprises the press part in this invention. On the inner diameter side of the front surface of the flange portion 17a, a recess portion 17f into which a rear end portion of a water stop packing 23 described later is inserted is formed. The recessed portion 17f includes an inner wall 17g on the outer diameter side of the flange portion 17a for holding the rear end portion of the water blocking packing 23 so as not to bulge outside the connecting portion. The above-described main body cylinder of the cylindrical body 17 includes a reduced diameter cylindrical portion 17d on the distal end peripheral surface side and an enlarged diameter cylindrical portion 17e on the flange portion 17a side. It has an outer diameter slightly smaller than that of the tube. Further, the inner bottom surface of the concave portion 17 f and the end surface 17 h that is on the outer diameter side of the concave portion 17 f are formed on orthogonal surfaces that are substantially orthogonal to the tube axis of the cylindrical body 17.
  In the course of being fitted into the connecting portion 15, an annular water-stop packing 23 as a water-stop member in the present invention is inserted into the cylindrical body 17. The cylindrical body 17 is disposed such that the water-stopping packing 23 abuts on the outer peripheral surface of the diameter-expanded cylindrical portion 17e, and the rear end portion of the water-stopping packing 23 is inserted into a recess 17f formed in front of the flange portion 17a. By fitting in the connection part 15 in a state, the water stop packing 23 is pressed toward the fluid pipe 1 which is the inner side of the connection part 15 by the flange part 17a. The water-stop packing 23 pressed by the flange portion 17a is pressed toward the tube axis of the connection portion 15 by the tapered surface 15g and elastically deforms, and the connection portion 15 and the cylindrical body 17 are sealed in a watertight manner. Water. A part of the water-stop packing 23 that is elastically deformed is further elastically deformed between the parallel surface 15 h and the cylindrical body 17 by fitting the cylindrical body 17 into the connecting portion 15.
  At this time, the cylindrical body 17 is disposed on substantially the same tube axis as the connecting portion 15 by applying a uniform force to the cylindrical body 17 from the elastically deformed water-stopping packing 23 to the entire circumference of the outer peripheral surface. The In other words, the cylindrical body 17 is automatically fitted to the connection portion 15 by fitting the cylindrical body 17 to the connection portion 15. More specifically, an end surface 17h which is a plane orthogonal to the tube axis of the cylindrical body 17 is in contact with the outer end 15c which is a plane orthogonal to the tube axis of the connecting portion 15 by metal touch, and By applying a uniform force from the elastically deformed water-stopping packing 23 to the entire circumference, the cylindrical body 17 is in a state of being arranged on the tube axis substantially the same as the connecting portion 15. The fitting to the connection part 15 is completed.
  In addition, although the water stop packing 23 is pressed by the taper surface 15g, the rear end portion of the water stop packing 23 is subjected to elastic deformation toward the outside of the connection portion, but the rear end portion of the water stop packing 23 is By abutting against the inner wall 17g, elastic deformation of the rear end portion of the water blocking packing 23 is prevented. For this reason, the outer end 15c and the end surface 17h can be brought into contact with each other without the rear end portion of the water-stopping packing 23 that is elastically deformed interposed between the outer end 15c and the end surface 17h.
  The cylindrical body 17 fitted in the connecting portion 15 has the contact member 26 abuts on the reduced diameter inner surface 15f of the connecting portion 15 near the on-off valve portion 14 and the flange portion 17a contacts the outer end 15c of the connecting portion 15. By being in contact with each other, an annular groove 15a as a part of the engaging portion is interposed between a punching machine 16 described later.
  As shown in FIG. 1, the cylindrical body 17 includes the connection portion 15 in a state in which the lock ring 22 and the water stop packing 23 used for connection to the branch pipe are assembled in advance on the inner peripheral surface of the connection portion 15. Is inserted. Further, according to the cylindrical body 17 having the above-described shape, the inside of the connecting portion 15 is easily inserted by the reduced diameter cylindrical portion 17d, and the outer peripheral surface of the enlarged diameter cylindrical portion 17e is easily brought into watertight contact with the water blocking packing 23. .
  In addition, a borer head 18 as a water stop lid, which is an accessory part of the drilling machine 16, is integrated with the drilling machine 16 on the back side of the flange portion 17 a of the cylindrical body 17. The borer head 18 is connected to the flange portion 17a of the cylindrical body 17 and the flange 20 of the connection portion 15 by a long bolt / nut 25, and is connected by pressing and holding a packing 27 disposed on the back surface of the flange portion 17a. The inside of the part 15 is kept watertight.
  The borer head 18 is formed with a communication passage 18a that extends in the outer diameter direction and communicates the inside and outside of the borer head 18, and is further provided with a discharge valve 19 that opens and closes the communication passage 18a.
  As shown in FIG. 2, the step of drilling the branch port 1 a will be described. The valve body 14 a of the on-off valve portion 14 is opened, the discharge valve 19 is opened, and the substantially cylindrical shape constituting the drilling machine 16 is formed. The cutter 21 is sent out to the fluid pipe 1 side to perform perforation. Since the cylindrical body 17 that prevents entry of chips into the annular groove 15a is interposed between the drilling machine 16 and the annular groove 15a, the tubular body 17 is separated from the tube wall along with the fluid flowing out from the fluid pipe 1. The generated chips can flow through the cylindrical body 17 without entering the annular groove 15a, and can be discharged to the outside of the connecting portion 15 through the communication path 18a. By this perforation, a substantially circular branch port 1a is formed in a direction orthogonal to the tube axis. Further, as described above, the cylindrical body 17 is arranged on the substantially same tube axis as that of the connecting portion 15, so that the cylindrical body 17 can be moved all around from the inner peripheral surface of the connecting portion 15 and the lock ring 22. Since the fluid pipes 1 are uniformly spaced apart from each other without any deviation, it is possible to avoid the possibility that the cylindrical body 17 contacts the inner peripheral surface of the connecting portion 15 or the lock ring 22 even when the fluid pipe 1 is perforated by the perforator 16.
  Further, just by pushing the cylindrical body 17 toward the opening / closing valve portion 14 side of the connection portion 15, the contact member 26 provided on the peripheral surface of the distal end causes the compression of the opening / closing valve portion 14 side relative to the annular groove 15 a as the engaging portion. It can be in close contact with the inner diameter surface 15f and easily prevent chips from entering. In addition, the cylindrical body does not necessarily need to be equipped with the contact | adherence member 26 in the front-end | tip peripheral surface, and may consist only of a single cylinder member. Furthermore, the cylindrical body is not necessarily limited to the one having water-tightness, and may be formed of a mesh body having such a fineness as to prevent, for example, entry of chips.
  After drilling the branch port 1a, the cutter 21 of the punching machine 16 is pulled back to the connection part 15 side, the valve body 14a of the on-off valve part 14 is closed, and the borer head 18 and the punching machine 16 are removed from the connection part 15.
  As shown in FIG. 3, just by screwing the screw 28 toward the outer end 15c side of the connecting portion 15 into the female screw hole 17b formed in the flange portion 17a, the outer end 15c is used as a reaction force. The cylindrical body 17 can be removed from the connecting portion 15.
  As shown in FIG. 5, after removing the cylindrical body 17, the branch pipe 40 having a bulging portion 40 a having a bulging tip in the outer diameter direction is inserted into the inside of the connection portion 15. The branch pipe 40 inserted into the connecting portion 15 is prevented from being pulled out when the bulging portion 40 a is engaged with the lock ring 22, and the watertightness is maintained because the outer peripheral surface abuts against the water blocking packing 23. . Similarly to the cylindrical body 17, a uniform force acts on the branch pipe 40 from the elastically deformed water-stopping packing 23 to the entire outer peripheral surface, so that the cylindrical body 17 is substantially the same as the connecting portion 15. The branch pipe 40 is automatically aligned with the connecting portion 15 arranged on the tube axis. In addition, when inserting the branch pipe 40, it is not necessarily limited to using the same water-stopping packing 23 interposed between the cylindrical body 17 and the connection portion 15. For example, the cylindrical pipe before the branch pipe 40 is inserted. You may make it remove the water stop packing 23 interposed in the body 17 and the connection part 15, and insert in the branch pipe 40 and the connection part 15 using the new water stop packing prepared separately. Next, by opening the valve body 14a again, the fluid pipe 1 and the branch pipe 40 communicate with each other through the branch port 1a.
  In this way, by the cylindrical body 17 interposed between the drilling machine 16 and the annular groove 15a as the engaging part, chips when the branching hole 1a is drilled by the drilling machine 16 enter the engaging part. Therefore, after the opening of the branch port 1a, the annular groove 15a is engaged with the branch pipe 40 without causing trouble due to the ingress of chips, and the branch pipe 40 is kept watertight at the connecting portion 15. Can be connected in a state. Further, the cylindrical body 17 can be fitted and inserted into the connection portion 15 with the lock ring 22 used for connection with the branch pipe 40 being assembled in advance on the inner peripheral surface of the connection portion 15. The branch pipe 40 can be inserted immediately after removing the state body 17 without requiring a separate assembling step.
  As described above, in the pipe connection device 1 according to the present embodiment, when the cylindrical body 17 is interposed between the drilling machine 16 and the annular groove 15a, the water stop packing 23 is placed inward of the connection portion 15. The connecting portion 15 includes an annular tapered surface 15g that gradually decreases in diameter from the outer end 15c of the connecting portion 15 inward, and includes a cylindrical body 17. Since the water-stopping packing 23 pressed by the flange portion 17a is further pressed toward the tube axis of the connection portion 15 by the tapered surface 15g, it is disposed on the tube axis substantially the same as the connection portion 15. By providing the tubular body 17 between the drilling machine 16 and the connecting portion 15, the water-stop packing 23 pressed by the flange portion 17 a further presses the tubular body 17 toward the tube axis of the connecting portion 15. Therefore, the cylindrical body is automatically placed on the same tube axis as the connection part. Therefore, the end peripheral surface of the cylindrical body is brought into contact with the opening / closing valve portion 14 side of the connection portion without being necessary to be aligned with respect to the opening / closing valve portion 14 so as to cut the branch port 1a with the punching machine 16. The powder can be prevented from entering the annular groove 15a, and after the branch port 1a is drilled, the annular groove 15a is engaged with the branch pipe 40 without causing any trouble due to the entry of the chips, and the branch pipe 40 is connected to the connecting portion. 15 can be connected in a state of maintaining watertightness.
  Moreover, since the cylindrical body 17 is provided with a close contact member 26 on the distal end peripheral surface that is in contact with the opening / closing valve portion 14 side of the connection portion 15, the cylindrical body 17 is connected to the opening / closing valve portion 14 side of the connection portion 15. Only by pushing in toward the opening, the contact member 26 provided on the peripheral surface of the tip makes a close contact with the on-off valve portion 14 side with respect to the annular groove 15a, and can easily prevent chips from entering.
  In addition, a borer head 18 that is an accessory part of the drilling machine 16 is attached to the outer end 15c of the connection part 15, and the communication path 18a that can communicate with the outside of the connection part 15 is formed in the borer head 18. When drilling the branch port 1a with the punching machine 16, the generated chips can be discharged to the outside of the connecting portion 15 through the communication path 18a by opening the communication path 18a formed in the borer head 18.
  Next, the pipe connecting device 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. 6 and 7, a plurality (four in this embodiment) of vibration preventing members 18b are formed at equal intervals on the outer peripheral surface of the borer head 18 in the second embodiment. These vibration preventing members 18b are configured to come into contact with the outer peripheral surfaces of the flange portion 17a and the flange 20 by attaching the borer head 18 to the rear surface side of the flange portion 17a.
  By fixing the borer head 18, the flange portion 17 a, and the flange 20 with the long bolts / nuts 25 with the vibration preventing members 18 b in contact with the outer peripheral surfaces of the flange portion 17 a and the flange 20 in this way, The vibration generated in the drilling machine 16 when the fluid pipe 1 is drilled can be prevented by the vibration preventing members 18b coming into contact with the flange portion 17a and the flange 20, and the branch port 1a can be drilled accurately by the cutter 21. It becomes possible.
  As described above, in the pipe connecting device 1 according to the present embodiment, the drilling machine 16 is configured integrally with the borer head 18 and prevents vibration of the drilling machine 16 by connecting to the connecting portion 15 from the outside. Since a plurality of vibration preventing members 18b are provided, the drilling machine 16 can be attached at the same time by attaching the borer head 18 to the outer end 15c of the connecting portion 15, and the vibration preventing member 18b causes vibration of the drilling machine 16 to occur. Therefore, when the branch port 1a is drilled, the branch port 1a is not shifted and drilled, and the possibility of damaging the inside of the connecting portion 15 can be solved.
  Next, a pipe connecting device according to a third embodiment will be described with reference to FIG. It should be noted that the same components as those shown in the above-described embodiment are denoted by the same reference numerals and redundant description is omitted.
  As shown in FIG. 8, the water stop packing 23 ′ in the third embodiment includes a soft portion 23a made of soft rubber and a hard portion 23b made of rubber harder than the soft rubber constituting the soft portion 23a. It is composed of an integrated structure. In addition, the soft part and hard part which comprise a water stop packing may be shape | molded as a separate body, respectively, and may be bonded together. Of these, the soft portion 23a is pressed by the tapered surface 15g when the tubular body 17 is fitted to the connection portion 15, and the tubular body 17 is substantially the same tube as the connection portion 15 as described in the first embodiment. It is arranged on the axis.
  On the other hand, the hard portion 23b is inserted and disposed in the recess 17f when the cylindrical body 17 is fitted to the connection portion 15, thereby causing a force directed toward the fluid pipe 1 of the flange portion 17a with almost no elastic deformation. It transmits to the soft part 23a. For this reason, the pipe connecting device 1 of the present embodiment is substantially the same as the connecting portion 15 with a small loss of force required to interpose the cylindrical body 17 between the annular groove 15a and the punching machine 16. Can be used to place on the same tube axis.
  As described above, in the pipe connection device 1 according to the present embodiment, the water blocking packing 23 ′ is configured to be harder than the soft part 23a and the soft part 23a pressed in the pipe axis direction of the connection part 15 by the tapered surface 15g. In addition, the cylindrical body 17 is provided between the soft portion 23a and the flange portion 17a and is pressed against the fluid pipe 1 by the flange portion 17a. When interposed between the connecting portion 15, the soft portion 23 a that is elastically deformed between the connecting portion 15 and the cylindrical body 17 is pressed against the outside of the connecting portion 15 by the hard portion 23 b. Therefore, not only can the water tightly stop between the connecting portion 15 and the cylindrical body 17 but also the hard portion 23b is pressed against the flange portion 17a while maintaining its shape without being relatively elastically deformed. And soft Since 23a can be flexibly elastic deformation between the connecting part 15 and the cylindrical body 17, it is possible to increase the accuracy with which the tubular member 17 is disposed substantially on the same tube axis and connecting portion 15.
  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 first embodiment, the cylindrical body 17 includes the contact member 26 made of an elastic material on the front end peripheral surface of the main body cylinder. For example, the cylindrical body is entirely made of an elastic material or a plastic material. It may be made of a resin material such as Further, the cylindrical body 17 of the above embodiment is configured to be removed from the connection portion 15 by screwing a screw 28 provided on the flange portion 17a. For example, the cylindrical body is separately provided. The cylindrical body of the above-described embodiment may be removed by a provided unillustrated removing means or the like, or the cylindrical body of the above-described embodiment is in contact with the tapered surface 15g where the water stop packing 23 expands toward the outer end 15c of the connecting portion 15. Since it is relatively easy to remove, the user may remove it by hand without using the removing means.
  Further, for example, in the first embodiment, by opening the communication path 18a of the borer head 18 attached to the outer end 15c of the connection portion 15, the chips are discharged to the outside of the connection portion 15 through the communication path 18a. Although the branch port 1a is drilled while being made, for example, a communication path for discharging the chips to the outside may be formed in the cylindrical body, or for temporarily collecting the chips when drilling An accumulation location may be provided separately.
DESCRIPTION OF SYMBOLS 1 Fluid pipe 1a Branch port 10 Pipe connection apparatus 11 Covering part 12 Housing | casing 13 Opening part 14 On-off valve part 15 Connection part 15a Annular groove (engagement part)
15g Tapered surface (tapered part)
16 punching machine 17 cylindrical body 17a collar part (pressing part)
18 Borer head (waterproof lid)
18a Communication path 18b Vibration prevention member 19 Discharge valve 20 Flange 22 Lock ring 23, 23 'Water-stop packing (water-stop member)
23a Soft part 23b Hard part 40 Branch pipe

Claims (5)

  1. A casing having a covering portion and a casing covering the fluid pipe, the casing being connected to the covering portion and communicating with a branch port formed in the fluid pipe, and a punching machine for punching the branch port Or it is comprised from the connection part which can be connected watertightly to a branch pipe, and the on-off valve part which can connect the said communication part and the said connection part, It is provided in the internal peripheral surface of the said connection part, The said branch pipe An engaging portion that engages with the branch pipe when connected to the connecting portion, and is interposed between the punching device and the engaging portion when connected to the connecting portion of the drilling machine, and a tip peripheral surface of the connecting portion A cylindrical body that prevents the chips from entering the engagement portion by contacting the casing on the opening / closing valve portion side of the engagement portion, and the cylindrical body is engaged with the punching machine. An annular water stop member that is elastically deformed by being interposed between the connecting portion and the tubular body and that is in watertight contact with the connecting portion and the cylindrical body, An example was a tube connecting device,
    The cylindrical body includes an annular pressing portion that presses the water stop member toward the inside of the connection portion when interposed between the drilling machine and the engagement portion, and the connection portion Is provided with an annular tapered portion having an inclination that gradually decreases in diameter from the outer end of the connecting portion inward, and the cylindrical body further includes a water-stop member pressed by the pressing portion by the tapered portion. The pipe connecting device, wherein the pipe connecting device is arranged on a pipe axis substantially the same as the connecting part by being pressed toward the pipe axis of the connecting part.
  2.   The pipe connection device according to claim 1, further comprising: a close contact member provided on a distal end peripheral surface of the cylindrical body that contacts the casing.
  3.   A water stop lid, which is an accessory part of the drilling machine, is attached to the outer end of the connection portion, and a communication path that can communicate with the outside of the connection portion is formed in the water stop lid. The pipe connecting device according to claim 1 or 2.
  4.   The drilling machine is configured integrally with the water stop lid, and includes a plurality of vibration preventing members that prevent vibration of the drilling machine by connecting the water stop lid from the outside to the connection portion. The pipe connection device according to claim 3.
  5.   The water stop member includes a soft portion pressed in the tube axis direction of the connection portion by the tapered portion, a hard portion configured to be harder than the soft portion, and pressed toward the fluid pipe by the press portion, The pipe connection device according to claim 1, wherein the pipe connection device is configured as described above.
JP2010258173A 2010-11-18 2010-11-18 Pipe connection device Active JP5714307B2 (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57145892U (en) * 1981-03-11 1982-09-13
JPH03118391U (en) * 1990-03-19 1991-12-06
JP2004308774A (en) * 2003-04-07 2004-11-04 Toda Constr Co Ltd Uninterrupted-water branch joint and branching method of copper pipe
JP2005106082A (en) * 2003-09-26 2005-04-21 Cosmo Koki Co Ltd Installation method of gate valve in continuous water construction method
JP2005315384A (en) * 2004-04-30 2005-11-10 Waterworks Technology Development Organization Co Ltd Pipe connection structure and setting method of work machine in piping to insertion pipe part
JP2008089095A (en) * 2006-10-03 2008-04-17 Kubota Corp Pipe joint and backup ring used for the same
JP4162063B2 (en) * 1998-07-13 2008-10-08 コスモ工機株式会社 Pipe connection device
JP2009008125A (en) * 2007-06-26 2009-01-15 Cosmo Koki Co Ltd Pipe joint
JP2009197847A (en) * 2008-02-20 2009-09-03 Maezawa Kyuso Industries Co Ltd Mechanism protecting method for forming diversion hole of empty pipe snap tap, and cylindrical plate

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57145892U (en) * 1981-03-11 1982-09-13
JPH03118391U (en) * 1990-03-19 1991-12-06
JP4162063B2 (en) * 1998-07-13 2008-10-08 コスモ工機株式会社 Pipe connection device
JP2004308774A (en) * 2003-04-07 2004-11-04 Toda Constr Co Ltd Uninterrupted-water branch joint and branching method of copper pipe
JP2005106082A (en) * 2003-09-26 2005-04-21 Cosmo Koki Co Ltd Installation method of gate valve in continuous water construction method
JP2005315384A (en) * 2004-04-30 2005-11-10 Waterworks Technology Development Organization Co Ltd Pipe connection structure and setting method of work machine in piping to insertion pipe part
JP2008089095A (en) * 2006-10-03 2008-04-17 Kubota Corp Pipe joint and backup ring used for the same
JP2009008125A (en) * 2007-06-26 2009-01-15 Cosmo Koki Co Ltd Pipe joint
JP2009197847A (en) * 2008-02-20 2009-09-03 Maezawa Kyuso Industries Co Ltd Mechanism protecting method for forming diversion hole of empty pipe snap tap, and cylindrical plate

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