JP5312297B2 - Apparatus and method for confirming rubber ring position of pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate check work on whether or not a rubber ring is placed in the stipulated position of a pipe joint which is structured so that a spigot formed on an end of one pipe is inserted within a socket formed in an end of the other pipe and the rubber ring for sealing is compressed between an inner circumferential surface of the socket and an outer circumferential surface of the spigot. <P>SOLUTION: This checking device includes: a body 22; an insertion piece 23 being mounted on the body 22 while being insertable into a gap 16 between the socket 2 and the spigot 4 from outside the socket 2 and being allowed to strike the rubber ring 10 at the time of insertion; a projecting rod 24 projecting from the body 22 while being allowed to get into the body 22 by an amount corresponding to the insertion amount of the insertion piece 23 by striking the socket 2 when the insertion piece 23 is inserted into the gap 16; and a signal generation means 54 generating a signal corresponding to the getting-in amount of the projecting rod 24 into the body 22. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a confirmation device and a confirmation method for a rubber ring position of a pipe joint.

  As a kind of pipe joint, the insertion port formed at the end of the other tube is inserted into the reception port formed at the end of one tube, and the inner peripheral surface of the reception port and the outer peripheral surface of the insertion port There is known a pipe joint configured such that a rubber ring for sealing is compressed therebetween. In such a pipe joint, it is customary that both the one and the other pipes are ductile cast iron pipes.

  Among such pipe joints, there is one called a slip-on pipe joint (Patent Document 1). Slip-on fittings are designed to compress the rubber rings between the receiving openings by inserting the inserting openings into the receiving openings in which the rubber rings have been accommodated in advance. It is.

  In joining the pipes, a lubricant is applied to the rubber ring and the insertion opening in order to reduce the frictional resistance generated between the rubber ring and the insertion opening when the insertion opening is inserted. If the frictional resistance is too large, the rubber ring will disengage from the predetermined position to the back side of the receiving port when the insertion port is inserted, so that the desired sealing performance cannot be exhibited, so the lubricant application process is an important process. is there.

  However, at the piping construction site, it is not impossible to forget to apply the lubricant. Also, when it rains, the lubricant may flow due to rain water. Furthermore, pipes such as water pipes are usually installed underground in the excavation groove, but if water accumulates in the excavation groove, lubricant may flow due to the water. .

  In order to prevent the occurrence of such a problem, it is performed to check whether or not the rubber ring is not detached from the normal position. A known confirmation method for this purpose will be described.

  FIG. 8 is a diagram showing a known confirmation method. Here, a receiving port 2 is formed at the end of one ductile cast iron pipe 1 to be joined to each other, and the other end of the ductile cast iron tube 3 is inserted into the receiving port 2. An insertion slot 4 is formed. A seal material accommodation groove 5, a lock ring accommodation groove 6, and an inner circumferential surface 7 are formed on the inner circumference of the receiving port 2 in this order from the opening end side. The seal material accommodation groove 5 includes a heel portion accommodating portion 8 having a deep groove structure and a valve portion accommodating portion 9 formed shallower than that.

  An annular rubber ring 10 is accommodated in the sealing material accommodation groove 5. The rubber ring 10 is formed by integrally forming a hard heel portion 11 and a soft valve portion 12. The rubber ring 10 is positioned in the tube axis direction by accommodating the heel portion 11 in the accommodating portion 8, and the valve portion 12 is accommodated in the accommodating portion 9, and the bottom surface of the accommodating portion 9 and the outer surface of the insertion opening 4. The required sealing function can be exhibited by being compressed between.

  In the lock ring housing groove 6, an annular circumferentially divided lock ring 13 is housed. A tapered annular protrusion 14 is integrally formed on the outer periphery of the distal end of the insertion opening 4.

  In such a configuration, when the tubes 1 and 3 are joined together, the lock ring 13 and the rubber ring 10 are accommodated in the interior of the receiving port 2 in advance, and the insertion port is inserted into the interior of the receiving port 2 in that state. 4 is inserted. Then, the tapered annular protrusion 14 formed in the insertion opening 4 passes through the position of the rubber ring 10 by elastically expanding the rubber ring 10 and elastically expands the lock ring 13. Passes through the position of the lock ring 13.

  FIG. 8 shows the subsequent joining completion state. In this state, the receiving port 2 and the insertion port 4 can be expanded and contracted in a range from the position where the tip of the insertion port 4 contacts the back end of the reception port 2 to the position where the annular protrusion 14 contacts the lock ring 13. . Further, when the annular protrusion 14 hits the lock ring 13, the insertion opening 4 is prevented from being detached from the receiving opening 2.

  When the joining work is completed, it is confirmed whether or not the rubber ring 10 has entered too deeply into the back side of the receiving port 2 from the specified position. For this purpose, a gauge 15 on a thin plate as shown in the figure is inserted into the gap 16 between the receiving port 2 and the insertion port 4 from the outside of the receiving port 2, and the tip is applied to the rubber ring 10. And it confirms by the length measurement operation | work that the penetration amount of the gauge 15 at that time is below a maximum permissible value. Record the measurement results as necessary. The same confirmation operation is performed at a plurality of positions along the circumferential direction of the tubes 1 and 3.

JP 2002-188773 A

  However, in such a method, it is necessary to confirm the amount of the gauge 15 entering, which is troublesome. Further, in general, the pipe line is often installed at the bottom of an excavation groove formed from the ground surface, and the above-described dimension checking operation is performed in a narrow space between the ground 17 and the insertion slot 4 at the bottom side portion of the pipe. It is necessary and difficult.

  Therefore, the present invention solves such a problem, and an insertion port formed at the end of the other tube is inserted into the reception port formed at the end of one tube, Easily check whether the rubber ring is installed at the specified position in a pipe joint that is configured to compress the rubber ring for sealing between the inner peripheral surface and the outer peripheral surface of the insertion slot. The purpose is to be able to.

  In order to achieve this object, the rubber ring position confirmation device for a pipe joint according to the present invention has an insertion port formed at the end of the other pipe inserted into the receiving port formed at the end of one of the pipes. Is a device for confirming the position of the rubber ring in a pipe joint configured such that a rubber ring for sealing is compressed between the inner peripheral surface of the receiving port and the outer peripheral surface of the insertion port, A main body part, an insertion piece that is attached to the main body part, can be inserted into the gap between the receiving port and the insertion port from the outside of the receiving port, and can hit a rubber ring at the time of insertion; and A protruding rod that protrudes from the main body and can enter the main body by an amount corresponding to the amount of insertion of the inserted piece by hitting the receiving port when the insertion piece is inserted into the gap, and a protruding rod to the main body Signal generating means for generating a signal corresponding to the amount of intrusion The features.

  According to the apparatus for confirming the position of the rubber ring of the pipe joint of the present invention, the signal generating means can generate a normal confirmation signal when the insertion piece is inserted within a specified amount when it hits the rubber ring, It is preferable that an abnormality confirmation signal can be generated when a larger amount than the prescribed amount is inserted when the inserted piece hits the rubber ring.

  According to the apparatus for confirming the position of the rubber ring of the pipe joint of the present invention, one end of the bendable body is attached to the main body, and the signal generating means is provided at the other end of the bendable body. Is preferred.

  According to the rubber joint position confirmation device of the present invention, the signal generating means has the light emitting means, and the light emitting means can emit light of different colors for the normal confirmation signal and the abnormality confirmation signal. It is preferred that it be possible. Alternatively, it is preferable that the light emitting means can generate a light emission signal as one of the normal confirmation signal and the abnormality confirmation signal and can generate a non-light emission signal as the other of the normal confirmation signal and the abnormality confirmation signal. .

  The method for confirming the position of the rubber ring of the pipe joint according to the present invention is characterized in that the confirmation apparatus for the position of the rubber ring of the pipe joint is used.

  According to the present invention, a signal corresponding to the installation position of the rubber ring can be generated simply by inserting the insertion piece into the gap between the receiving port and the inserting port from the outside of the receiving port, so only the signal is recognized. Thus, it is possible to confirm whether or not the rubber ring is installed at the normal position without measuring the gauge entry size.

It is a figure which shows the use condition of the confirmation apparatus of the rubber ring position of the pipe joint of embodiment of this invention. It is sectional drawing of the confirmation apparatus of the rubber ring position of the pipe joint of FIG. It is a circuit diagram of the confirmation apparatus of the rubber ring position of the pipe joint. It is a figure which shows operation | movement of the confirmation apparatus of the rubber ring position of the pipe joint. It is a figure which shows schematic structure of the confirmation apparatus of the rubber ring position of the pipe joint of other embodiment of this invention. It is a figure which shows the use condition of the confirmation apparatus of the rubber ring position of the pipe joint of FIG. It is a figure which shows the circuit structure of the confirmation apparatus of the rubber ring position of the pipe joint of further another embodiment of this invention. It is a figure which shows the confirmation method of the rubber ring position of the conventional pipe joint.

  About the confirmation apparatus and confirmation method of the rubber ring position of the pipe joint according to the embodiment of the present invention, the same members as those shown in FIG. This will be described in detail.

  In FIG. 1, reference numeral 21 denotes a rubber ring position confirmation device for a pipe joint according to an embodiment of the present invention. The confirmation device 21 includes a cylindrical main body portion 22, a thin plate-like insertion piece 23 attached to the main body portion 22 in a cantilever state, and a protruding rod that protrudes from the main body portion 22 in the same direction as the insertion piece 23. 24. The main body 22 is formed with a size that is easy for an operator to grip with the hand 25.

  As shown in FIG. 2, the main body 22 includes a center tube portion 26, a rear cap 27 screwed to the rear side of the center tube portion 26, and a bottomed short tube screwed to the front side of the center tube portion 26. A portion 28 and a front cap 29 screwed to the front side of the short tube portion 28 are provided. Reference numeral 30 denotes a bottom portion of the short cylinder portion 28. The main body 22 constituted by these members is preferably formed of a material such as metal or plastic.

  A base member 31 is provided inside the rear portion of the central cylinder portion 26. The base member 31 is fixed to the central cylinder portion 26 with screws 32. A columnar space 33 is formed inside the central tube portion 26 and the short tube portion 28 between the base member 31 and the bottom portion 30 of the short tube portion 28, and a cylindrical slider 34 is formed in this space 33. Is housed. The length of the slider 34 along the length direction of the main body 22 is formed to be shorter than the length of the space 33, so that the slider 34 can slide in the length direction of the main body 22 in the space 33. A bush 35 is press-fitted inside the front side of the central cylindrical portion 26, and the slider 34 is slidably supported by the bush 35. An annular seal packing 36 is provided in a compressed state between the inner periphery of the center tube portion 26 and the outer periphery of the slider 34 at the front end of the center tube portion 26.

  A groove 37 in the length direction is formed on the outer surface of the slider 34. Reference numeral 43 denotes a headless screw, one end of which is screwed into the central cylindrical portion 26 and the other end is fitted into the groove portion 37. As a result, the slider 34 is prevented from rotating. A compression coil spring 38 is provided between the rear portion of the slider 34 and the base member 31. The compression coil spring 38 can press the slider 34 toward the front side of the main body portion 22, that is, toward the bottom portion 30 of the short cylindrical portion 28. Reference numeral 39 denotes a support, and one end of the support 39 is attached to the base member 31 in a state of being fitted to the compression coil spring 38, whereby the compression coil spring 38 can be positioned at the center of the main body 22.

  The front cap 29 is screwed to the front end of the short cylinder portion 28 in a state of covering the front end of the short cylinder portion 28. Through holes 40 and 41 are formed in the center portion of the bottom portion 30 of the short cylinder portion 28 and the center portion of the front cap 29. The protruding rod 24 is fixed to the slider 34 at the base end, and protrudes to the outside of the main body 22 through the through holes 40 and 41. A hemispherical contact 42 is integrally formed at the tip of the protruding rod 24.

  The insertion piece 23 has a proximal end 45 fixed to the front cap 29. Reference numeral 46 denotes an insertion portion between the receiving opening in the insertion piece 23. The insertion portion 46 is provided in an inclined state with respect to the axis of the main body 22 so that the distal end side approaches the axis of the main body 22.

  An O-ring 47 is provided at the screwed portion between the rear cap 27 and the central cylindrical portion 26, and seals between the two. An electronic circuit unit 48 is provided inside the rear cap 27. In the electronic circuit portion 48, 49 is a circuit board, and the front end thereof is attached to the base member 31. A pair of microswitches 50 and 51 are attached to the circuit board 49 at a predetermined distance in the axial direction of the main body. The circuit board 49 is provided with a battery case 52, and a dry battery 53 is accommodated in the battery case 52.

  A light emitting diode 54 is provided at the rear end of the circuit board 49. A transparent window 55 is provided at the bottom of the rear cap 27, and the light of the light emitting diode 54 can be emitted to the outside of the rear cap 27, that is, the outside of the confirmation device 21 through the transparent window 55. ing.

  A proximal end portion of the operating rod 57 is fixed to the rear end of the slider 34 by a screw 58. The operating rod 57 penetrates through the base member 31 and the tip thereof reaches the electronic circuit portion 48. The distal end of the actuating rod 57 is formed in a bent shape in the electronic circuit portion 48, thereby constituting a kick-up portion 59 for actuating the microswitches 50 and 51.

  That is, when the contact 42 at the tip end of the projecting rod 24 is pushed from the state shown in FIG. 2 and the projecting rod 24 enters the main body 22, the slider 34 resists the force of the compression coil spring 38 thereby. The actuating rod 57 is also moved toward the rear side of the electronic circuit section 48 in conjunction with the movement. Then, as the movement amount increases, the kicking portion 59 of the operating rod 57 first kicks up and operates the front micro switch 50. Next, while the kick-up state of the micro switch 50 on the front side is maintained by the operating rod 57, the upper part 59 kicks up and operates the micro switch 51 on the rear side. Thereafter, the movement amount of the operating rod 57 can be further increased while maintaining the kick-up state of both the front micro switch 50 and the rear micro switch 51.

  The circuit configuration of the electronic circuit unit 48 is shown in FIG. Each of the microswitches 50 and 51 has a normally closed terminal 61, a normally open terminal 62, and a common terminal 63. The light emitting diode 54 includes a ground terminal 64, a blue light emitting input terminal 65, and a red light emitting input terminal 66. Then, the common terminal 63 of the front microswitch 50 is grounded, and the normally closed terminal 61 of the front microswitch 50 is in an unconnected open state. The normally open terminal 62 of the front microswitch 50 is connected to the common terminal 63 of the rear microswitch 51 through a dry battery 53 and a booster circuit 67 for causing the light emitting diode 54 to emit light using the dry battery as a power source. Yes. The booster circuit 67 includes current limiting means for setting the current to the light emitting diode 54 to a certain value or less. The normally closed terminal 61 of the rear microswitch 51 is connected to the blue light emitting input terminal 65 of the light emitting diode 54, and the normally open terminal 62 of the rear microswitch 51 is connected to the red light emitting input terminal 66 of the light emitting diode 54. Connected.

  In such a configuration, as shown in the drawing, in the state in which the kick upper portion 59 of the actuating rod 57 does not kick any of the micro switches 50 and 51, the front micro switch 50 opens the space between the dry battery 53 and the ground. Therefore, the circuit does not operate and the diode 54 does not emit light.

  When the kicking portion 59 of the actuating rod 57 kicks up the front microswitch 50, the normally open contact is closed, and the normally open terminal 62, that is, the dry battery 53 is connected to the ground. Then, current is supplied to the blue light emitting input terminal 65 of the diode 54 via the normally closed terminal 61 of the rear microswitch 51, and the diode 54 emits blue light.

  In this state, the operating rod 57 continues to move, and when the upper portion 59 stops moving before kicking up the rear micro switch 51, the front micro switch 50 is kicked up by the operating rod 57. Therefore, the diode 54 continues to emit blue light.

  When the actuating rod 57 moves until the upper part 59 kicks up the rear micro switch 51, the normally open contact is kept closed by kicking up the front micro switch 50, while the rear micro switch 51 is closed. The open / close state is changed. That is, when the rear micro switch 51 is kicked up, the normally open contact is closed and the normally closed contact is opened. Then, in the micro switch 51 on the rear side, a current flows to the normally open terminal 62 instead of the normally closed terminal 61 so that the diode 54 emits red light instead of the previous blue.

  When the actuating rod 57 further moves, the kick-up state of both the microswitches 50 and 51 is maintained, and the diode 54 continues to emit red light until the actuating rod 57 reaches its movement limit.

  When the operating rod 57 returns to the original position, the diode 54 changes its light emission state from red to blue, and then stops emitting light.

  When the position of the rubber ring 10 is confirmed after the joint operation of the pipe joint shown in FIG. 1 is completed, the operator holds the confirmation device 21 in the hand 25 as shown in FIG. It is inserted into the gap 16 between the receiving port 2 and the insertion port 4 from the outside of the receiving port 2. Then, the contact 42 of the protruding rod 24 comes into contact with the end face of the receiving port 2. In FIG. 4, A indicates the position of the contact 42 before hitting the end face of the receiving port 2, and a indicates the position of the upper portion 59 at that time.

  When the insertion piece 23 is further inserted after the contact 42 of the projecting rod 24 hits the end face of the receiving port 2, the projecting rod 24 enters the main body portion 22, and the operating rod 57 moves in conjunction therewith. The upper part 59 kicks up the micro switch 50 on the front side. In FIG. 4, b is the position of the upper part 59 at that time, and B is the position of the contactor 42 at that time. That is, when the insertion piece 23 is inserted into the gap 16 between the receiving port 2 and the insertion port 4, the initial stage of the insertion, that is, the tip of the insertion portion 46 of the insertion piece 23 is brought into contact with the rubber ring 10 shown in FIG. Before reaching, the diode 54 emits blue light.

  When the insertion piece 23 is further inserted thereafter, the insertion piece 23 eventually hits the rubber ring 10 as shown in FIG. Then, no further insertion is possible.

  The position C of the contact 42 in FIG. 4 is set corresponding to the position exceeding the allowable insertion limit of the insertion piece 23. When the contact 42 reaches this position C, the kicking portion 59 of the operating rod 57 reaches the position c and kicks up the rear micro switch 51. As a result, the light emitting state of the diode 54 changes from blue to red.

  That is, if the insertion piece 23 hits the rubber ring 10 before the contact 42 reaches the position C, the position of the rubber ring 10 is normal, and it does not enter the back side of the receiving port 2 beyond the allowable range. There is no situation. At this time, the diode 54 remains emitting light in blue, thereby confirming that the rubber ring 10 is present at the normal position.

  On the contrary, when the rubber ring 10 has entered too deeply into the back side of the receiving port 2 from the specified position, the insertion piece 23 enters into the back side of the gap 16 correspondingly, and thereby the contact 42 The projecting rod 24 enters the main body 22 until the position C reaches or exceeds the position C. As a result, since the light emission state of the diode 54 changes from blue to red, it is confirmed that the position of the rubber ring 10 is abnormal.

  The position D of the contact 42 in FIG. 4 indicates the limit of the protrusion rod 24 from entering the main body 22. d is the position of the upper part 59 at that time.

  Such a confirmation operation of the position of the rubber ring 10 is performed at a plurality of positions along the circumferential direction of the pipe. When the check operation at each position is completed, the protruding piece 24 is moved out of the contact by the action of the compression coil spring 38 shown in FIG. 42 is returned to return to position A in FIG. At this time, the diode 54 stops emitting light.

  In this way, the operator simply holds the confirmation device 21 in the hand 25, inserts the insertion piece 23 into the gap 16 between the receiving port 2 and the insertion port 4, and observes the light emission state of the light emitting diode 54. The quality of the position of the rubber ring 10 can be easily confirmed over the entire circumference. For example, the light emission state of the diode 54 of the confirmation device 21 that is being confirmed at the bottom of the tube can be confirmed at other positions. In addition, it is possible to perform the confirmation operation of the position of the rubber wheel 10 without performing the length measurement work or the work of recording the measurement result as in the case of using a conventional gauge.

  In addition, if a wide-angle lens is used as the transparent window portion 55, the confirmation work by observing the light emission state can be performed from a wide angle. For example, the light emission state of the diode 54 of the confirmation device 21 during the confirmation work at the tube bottom can be confirmed at the tube top.

  It should be noted that another confirmation signal such as a sound may be employed instead of or in addition to the above confirmation signal by light.

  The confirmation device 21 having the above configuration has an advantage that the battery 53 is not consumed due to forgetting to turn off the power because the power is automatically turned on during the confirmation work and automatically turned off when not in use. If the screwing between the central tube portion 26 and the rear cap 27 is loosened and the rear cap 27 is opened, the dry battery 53 can be replaced as shown by the phantom line in FIG.

  Since the space between the rear cap 27 and the central cylindrical portion 26 is sealed by an O-ring 47 and the space between the central cylindrical portion 26 and the slider 34 is sealed by a seal packing 36, the confirmation device 21 can be used for rainwater and others. Even when it is used at the site of laying a pipe line that is easily affected by accumulated water, it is possible to reliably prevent water from entering the electronic circuit section 48.

  FIG. 5 shows a schematic configuration of a confirmation apparatus for a rubber ring position of a pipe joint according to another embodiment of the present invention. In the confirmation device 21 </ b> A, a metal bendable body 71 is connected to the rear side of the main body 22. As the bendable body 71, for example, a member generally called “stand tube” and having watertightness can be suitably used. "Stand tube" is a tube formed by winding a wire with a special shape in a spiral shape, and can be bent into an arbitrary curved shape as shown in the figure, while maintaining its bent state. Is possible. The stand tube having water tightness is used for a hot water supply pipe of an instantaneous water heater, for example. By having water-tightness, it is possible to reliably prevent water from entering the electronic circuit portion 48 while having a flexible structure.

  The bendable body 71 is configured in a tube shape as described above, and one end portion, that is, the base end portion thereof is attached to the main body portion 22. The light emitting diode 54 and the transparent window 55 are provided at the other end of the bendable body 71, that is, at the tip. A lead wire to the light emitting diode 54 is passed through the bendable body 71. In addition, if the outer periphery of the metal bendable body 71 is covered with a resin flexible tube or the like, the bendable body 71 can be prevented from being scratched or rusted.

  With such a configuration, the position of the rubber ring of the pipe joint can be confirmed with the light emitting diode 54 directed in an arbitrary direction. For example, when a pipe line is laid on the ground 17 at the bottom of an excavation groove excavated from the ground surface as shown in FIG. 6, when checking the rubber ring position of the pipe joint at the bottom of the pipes 1 and 3, As shown in the figure, the light emitting diode 54 can emit light upward by setting the tip of the bendable body 71 upward. For this reason, the rubber ring position of the pipe joint at the bottom of the pipes 1 and 3 can be confirmed at a wide position above the bottom of the pipes 1 and 3 without entering the narrow space near the bottom of the pipes 1 and 3 or the ground 17. It can be performed.

  FIG. 7 shows another example of the electronic circuit unit and the actuating rod. In the electronic circuit portion 48A of FIG. 7, only one micro switch 50 is used. The light emitting diode 54A is a single color. The common terminal 63 of the microswitch 50 is grounded, and the normally open terminal 62 is led to the light emitting diode 54 </ b> A via the dry battery 53 and the booster circuit 67.

  The actuating rod 57A has a kick-up portion 59 at the tip, and a concave kick-up release portion 72 is formed on the base end side. A kick-up state maintaining part 73 following the kick-up part 59 is formed between the kick-up part 59 and the kick-up releasing part 72.

  In such a configuration, before the operating rod 57A is moved, the microswitch 50 opens the space between the dry battery 53 and the ground, so that the circuit does not operate and the diode 54A does not emit light. When the actuating rod moves and the upper part 59 kicks up the microswitch 50, the normally open contact is closed and the dry battery 53 is connected to the ground, whereby the diode 54A emits light. This point is the same as the operation of the electronic circuit unit 48 shown in FIG. After that, when the operating rod 57A continues to move and the movement is stopped before the kick-up releasing unit 72 reaches the micro switch 50, the micro switch 50 is maintained in the kicked-up state by the kick-up state maintaining unit 73. Therefore, the diode 54A is maintained in the light emitting state.

  When the actuating rod 57A moves until the kick release portion 72 reaches the micro switch 50, the lift state of the micro switch 30 is thereby released, and the diode 54A stops emitting light.

  That is, in the electronic circuit portion 48A of FIG. 7, the inserting piece 23 of the confirmation device is inserted into the gap between the receiving port 2 and the inserting port 4 as in the case shown in FIG. When hitting the end face of the receiving port 2, the actuating rod 57A starts to move and the diode 54A emits light. And if the position of the rubber ring 10 is appropriate, the diode 54A maintains the light emission state correspondingly.

  When the rubber ring 10 has entered too deeply into the back side of the receiving port 2 from the specified position, the actuating rod 57A moves correspondingly. As a result, the kick-up release portion 72 reaches the position of the microswitch 50, and the diode 54A stops emitting light.

  That is, according to the electronic circuit section 48A of FIG. 7, when the rubber ring 10 is in an appropriate position, the diode 54A emits light, and when the position of the rubber ring 10 is abnormal, the diode 54A that has once emitted light thereafter Since the light emission is stopped, the abnormality can be confirmed.

  Alternatively, instead of the above, it may be configured such that the light emitting diode 54A does not emit light when it is normal and emits light only when it is abnormal.

DESCRIPTION OF SYMBOLS 1 Tube 2 Receiving port 3 Tube 4 Insertion 10 Rubber ring 16 Crevice 21 Confirmation device 22 Main body part 23 Insertion piece 24 Projection rod 54 Light emitting diode 54A Light emitting diode

Claims (6)

The insertion port formed at the end of the other tube is inserted into the interior of the reception port formed at the end of one tube, and sealing is performed between the inner peripheral surface of the reception port and the outer peripheral surface of the insertion port. An apparatus for confirming the position of the rubber ring in a pipe joint configured such that the rubber ring is compressed,
The main body,
An insertion piece that is attached to the main body portion and can be inserted into the gap between the receiving port and the insertion port from the outside of the receiving port, and can hit the rubber ring at the time of insertion,
A projecting rod that protrudes from the main body part and can enter the main body part by an amount corresponding to the insertion amount of the insertion piece by hitting the receiving port when the insertion piece is inserted into the gap,
Signal generating means for generating a signal corresponding to the amount of protrusion of the protruding rod into the main body,
An apparatus for confirming the position of a rubber ring of a pipe joint, comprising:   The signal generation means can generate a normal confirmation signal when the inserted piece hits the rubber ring within the specified amount, and inserts more than the specified amount when the inserted piece hits the rubber ring. 2. An apparatus for confirming the position of a rubber ring of a pipe joint according to claim 1, wherein an abnormality confirmation signal can be generated in the case of being performed.   The rubber ring position of the pipe joint according to claim 1 or 2, wherein one end of the bendable body is attached to the main body, and the signal generating means is provided at the other end of the bendable body. Confirmation device.   4. The pipe joint according to claim 2, wherein the signal generating means includes a light emitting means, and the light emitting means can emit light of different colors depending on a normal confirmation signal and an abnormality confirmation signal. For checking the position of the rubber ring.   The signal generating means has a light emitting means, which can generate a light emitting signal as one of a normal confirmation signal and an abnormality confirmation signal, and a non-light emitting signal as the other of the normal confirmation signal and the abnormality confirmation signal. The apparatus for confirming the position of a rubber ring of a pipe joint according to claim 2 or 3, characterized in that it can be generated.   A method for confirming the position of a rubber ring of a pipe joint, wherein the apparatus for confirming the position of a rubber ring of a pipe joint according to any one of claims 1 to 5 is used.

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