JP2023045345A - Seal member position measuring machine - Google Patents

Abstract

To provide a seal member position measuring instrument that can easily exchange an insertion body.SOLUTION: A measuring instrument 1 for measuring a position of a seal member provided in a pipe fitting, has, being provided in a measuring instrument main body 2,: an insertion body 3; and a freely retractable detection rod 4. The insertion body 3 is inserted to a gap between a socket and a spigot, and is capable of abutting with a seal member. The measuring instrument main body 2 has an insertion body attachment unit 8 that is capable of attaching the insertion body 3. A first fitting part 9 is provided in the insertion body attachment unit 8, and a second fitting part 11 is provided in the insertion body 3. The second fitting part 11 fits into the first fitting part 9, and thereby, the insertion body 3 is attached to the insertion body attachment unit 8, and the second fitting part 11 is disengaged from the first fitting part 9, thereby the insertion body 3 is detached from the insertion body attachment unit 8.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a seal member position measuring instrument for measuring the position of a seal member provided in a pipe joint.

Conventionally, as a type of pipe joint, as shown in FIG. A pipe joint 106 is known in which an annular seal member 105 is compressed between the outer peripheral surface of the insertion port 102 and the inner peripheral surface of the socket 104 .

A seal member accommodation groove 109 and a lock ring accommodation groove 110 are formed in order from the open end side of the socket 104 on the inner periphery thereof. The sealing member accommodating groove 109 has a heel portion accommodating portion 111 having a deep groove structure and a valve portion accommodating portion 112 formed shallower than the heel portion accommodating portion 111 .

The seal member 105 is made of rubber and accommodated in the seal member accommodation groove 109 . As shown in FIG. 19, this sealing member 105 is formed by integrally forming a hard heel portion 113 and a soft valve portion 114 . The sealing member 105 is positioned in the tube axis direction 117 by housing the heel portion 113 in the housing portion 111 , and the valve portion 114 is housed in the housing portion 112 to form the inner peripheral surface of the receptacle 104 . By being compressed between the bottom surface of the accommodating portion 112 and the outer surface of the insertion opening 102, a required sealing function can be exhibited.

The lock ring accommodating groove 110 accommodates an annular lock ring 115 that is divided into one piece in the circumferential direction. A tapered annular protrusion 116 is integrally formed on the outer periphery of the tip of the insertion port 102 .

In such a configuration, when one tube 101 is joined to the other tube 103, the lock ring 115 and the sealing member 105 are previously accommodated inside the socket 104, and the socket 104 in that state is filled with the lock ring 115 and the seal member 105. Insert the receptacle 102 . Then, the annular projection 116 of the insertion port 102 elastically expands the seal member 105 to pass through the position of the seal member 105, and elastically expands the lock ring 115 to open the lock ring 115. pass through the position.

FIG. 18 shows the subsequent bonding completion state. In this state, the receptacle 104 and the receptacle 102 can be expanded and contracted in a range from the position where the tip of the receptacle 102 hits the innermost end 104b of the receptacle 104 to the position where the annular projection 116 contacts the lock ring 115. be. Also, the annular protrusion 116 abuts against the lock ring 115 , thereby preventing the insertion port 102 from being detached from the receptacle 104 .

After the joining work is completed, it is checked whether the seal member 105 has entered too deeply into the socket 104 from the specified position. For this purpose, a seal member position confirming device 131 as shown in FIG. 19 is used.

The seal member position confirming device 131 will be described below.

The sealing member position confirming device 131 has a device main body 132 , an insert 133 , a protruding rod 134 and a light emitting diode 135 . Here, the insert 133 is attached to the front end portion of the device main body 132 and can be inserted into the gap 136 (see FIG. 18) between the socket 104 and the insertion opening 102 from the outside of the socket 104 . It is a member that can come into contact with the seal member 105 when inserted.

Further, the protruding rod 134 protrudes from the front end portion of the device main body 132 and contacts the socket 104 when the insert 133 is inserted into the gap 136 , thereby extending the device by a dimension corresponding to the insertion dimension of the insert 133 . It is a member that can be inserted into the body portion 132 .

Furthermore, the light-emitting diode 135 emits light of two colors, blue and red, depending on the size of the projecting rod 134 inserted into the device main body 132 .

In general, the insert 133 is attached to the device main body 132 with a plurality of screws or the like.

According to this, the operator holds the apparatus main body 132 of the sealing member position confirming apparatus 131 and inserts the insertion body 133 into the gap 136 between the socket 104 and the insertion opening 102 . Then, the tip of the protruding rod 134 abuts against the end face 104 a of the socket 104 , and when the insertion body 133 is further inserted into the gap 136 , the protruding rod 134 enters the main body 132 . After that, when the tip of the insert 133 hits the seal member 105, the insert 133 cannot be inserted any more. The protruding rod 134 enters into the device main body 132 by a dimension corresponding to the insertion dimension of the insert 133 at this time, and the light emitting diode 135 emits blue or red light according to the penetration dimension of the protruding rod 134 .

In other words, when the sealing member 105 is in the normal position, the projection rod 134 enters into the specified dimension, and the light emitting diode 135 emits blue light. Also, when the sealing member 105 is in an abnormal position where the sealing member 105 is inserted too far to the inner side than the normal position, the insertion dimension of the protruding rod 134 becomes larger than the prescribed dimension, and the light emitting diode 135 emits red light. Thereby, the position of the seal member 105 can be confirmed using the seal member position confirming device 131 .

Incidentally, the sealing member position confirming device 131 as described above is described in Patent Document 1 below, for example.

In addition, regarding the work to confirm the position of the seal member 105 as described above, the following is described in the "GX type ductile iron pipe joining procedure (applicable nominal diameter 75 to 450)" issued by the Japan Ductile Iron Pipe Association. There are such provisions.

First, check the position of the sealing member 105 using a check gauge (insert 133) with a thickness of 2 mm. The position of 105 is checked, and if it is within the acceptable range, it is judged to be normal. If the check gauge (insert 133) with a thickness of 2 mm or 4 mm is used, if it is out of the acceptable range, it is determined to be abnormal, and the pipe joint 106 is dismantled and inspected. page).

When the position confirmation work of the seal member 105 is performed according to such regulations, first, the position of the seal member 105 is confirmed using the seal member position confirmation device 131 in which the insert 133 having a thickness of 2 mm is attached to the main body 132 of the device. If it is out of the acceptable range, the insert 133 with a thickness of 2 mm is removed from the apparatus main body 132, the insert 133 with a thickness of 4 mm is attached to the apparatus main body 132, and the insert 133 with a thickness of 4 mm is attached. It is necessary to confirm the position of the seal member 105 using the seal member position confirming device 131 .

Japanese Patent No. 5312297

However, in the above-described conventional type, the insert 133 is generally attached to the apparatus main body 132 with a plurality of screws or the like. It is necessary to use a tool to turn a plurality of screws to attach and detach, and there is a problem that it takes time and effort to replace the insert 133 with a different thickness.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a seal member position measuring machine that allows easy replacement of an insert.

In order to achieve the above object, the first invention is such that a receptacle formed at the end of one tube is inserted into a receptacle formed at the end of the other tube,
A seal member position measuring instrument for measuring the position of a seal member in a pipe joint configured such that an annular seal member is compressed between an outer peripheral surface of a spigot and an inner peripheral surface of a socket,
having a measuring instrument main body, an insertion body provided in the measuring instrument main body, and a retractable detection rod,
The insert is inserted from the outside of the socket into the gap between the socket and the insertion opening and can abut against the sealing member,
The detection rod is biased in the direction of projection from the main body of the measuring instrument, and by contacting the end face of the socket when the insert is inserted into the gap, only the dimension corresponding to the insertion dimension of the insert is measured. It is possible to enter the machine body,
The main body of the measuring instrument has an insert attachment part to which the insert can be attached,
A first fitting portion is provided in the insert mounting portion,
The insert is provided with a second fitting portion,
The insert is attached to the insert mounting portion by fitting the second fitting portion to the first fitting portion,
The insert body is removed from the insert mounting part by the second fitting part being separated from the first fitting part.

According to this, the insert can be removed from the insert mounting portion by disengaging the second fitting portion from the first fitting portion, so that the insert can be easily removed from the main body of the measuring device. Further, by fitting the second fitting portion to the first fitting portion, the insert body is attached to the insert body mounting portion, so that the insert body can be easily mounted to the measuring instrument main body. Thereby, the insert can be easily replaced.

In the seal member position measuring machine in the second invention, the first fitting portion is a notch portion,
the second fitting portion is a protrusion,
The notch has an open portion that is open in the direction in which the insert is inserted into the gap, and a narrow portion that is narrower than the protrusion,
The projecting portion can be freely fitted into and removed from the notch portion through the narrow portion from the open portion,
The narrow portion is pushed by the protrusion and expands in the width direction while the protrusion is being fitted into the notch,
In a state in which the projection passes through the narrow portion and fits into the notch, the narrow portion is contracted from the state expanded in the width direction.

According to this, when fitting the projection into the notch, the projection is fitted into the notch from the open portion of the notch through the narrow width portion. This makes it possible to easily attach the insert to the main body of the measuring instrument. Further, when the protrusion is fitted in the notch, the narrow width portion is contracted from the expanded state in the width direction, so that the protrusion can be prevented from inadvertently detaching from the notch.

In the seal member position measuring instrument according to the third aspect of the present invention, the measuring instrument main body has a lateral vibration preventing portion for preventing lateral vibration of the insert body in the direction of rotation about the projection.

According to this, it is possible to prevent lateral vibration of the insert attached to the main body of the measuring instrument.

In the seal member position measuring machine according to the fourth invention, the measuring machine body has a main body,
The insert mounting portion is a mounting plate attached to the main body,
A notch is formed in the mounting plate,
One end of the notch communicates with the notch.

According to this, when the protrusion is fitted into or removed from the notch, the narrow width portion of the notch is pushed by the protrusion and expands in the width direction. Since the portion is also expanded, the protrusion can be smoothly put in and taken out of the cutout portion, thereby making it possible to easily attach and detach the insert to and from the measuring instrument main body.

In the seal member position measuring machine according to the fifth invention, the other end of the notch communicates with the hole formed in the mounting plate,
The hole is wider than the notch and narrower than the notch.

According to this, when the narrow width portion of the cutout portion is pushed by the protrusion and expands in the width direction, the cutout portion is easily expanded. In addition, since the stress acting on the other end of the notch is dispersed by the hole, stress concentration at the other end of the notch is alleviated, and damage to the other end of the notch can be prevented.

In the sealing member position measuring machine according to the sixth invention, the mounting plate is attached to the main body by a plurality of fastening members,
The cut portion is positioned between a pair of fastening members facing each other in the width direction of the cut portion,
When the narrow width portion is pushed by the projection and expands in the width direction while the projection is being fitted into the notch, the notch expands in the width direction together with the narrow width portion.

According to this, when the narrow portion of the notch is pushed by the projection and expands in the width direction, the notch expands easily, and part of the load generated when the notch expands is absorbed by the pair of fastening members. I can receive it. As a result, it is possible to prevent the notch from expanding excessively, and the stress applied to the hole is reduced.

In the seal member position measuring machine according to the seventh invention, the insert has a different thickness at one end and a thickness at the other end,
The insert body can be replaced between a first mounting posture in which one end is inserted into the gap between the socket and the receptacle, and a second mounting posture in which the other end is inserted into the gap between the socket and the receptacle. It is what is.

According to this, the position of the seal member can be measured by inserting one end of the insert into the gap between the receptacle and the receptacle by attaching the insert to the measuring instrument main body in the first attachment posture. Further, by attaching the insert to the main body of the measuring instrument in the second attachment posture, the position of the seal member can be measured by inserting the other end of the insert into the gap between the socket and the receptacle.

As a result, for example, first, the thinner end of the insert is inserted into the gap between the socket and the insertion port to measure the position of the seal member. The thicker end of the insert can be inserted into the gap between the receptacle and receptacle and the position of the seal member can be measured again.

As described above, according to the present invention, the insert body of the seal member position measuring machine can be easily replaced with the main body of the measuring machine.

FIG. 2 is a perspective view of the seal member position measuring machine according to the first embodiment of the present invention, showing a first mounting posture in which one end of the insert body can be inserted into the gap between the insertion opening and the socket; It is an exploded perspective view of the seal member position measuring machine of the same. FIG. 2 is a view taken along line XX in FIG. 1; It is a partially notched side view of a seal member position measuring machine same. It is a partial notch front view of the seal member position measuring machine of the same, showing an enlarged configuration in which the protrusion of the insert is fitted into the notch of the mounting plate. It is a figure of the mounting plate of a seal member position measuring machine same. It is a perspective view of the insert of a seal member position measuring machine equally. FIG. 8 is a view taken along line XX in FIG. 7; It is a figure of a seal member position measuring machine same, and shows the state where the insert was removed from the main body of a measuring machine. It is an enlarged view showing a state immediately before inserting the projection of the insert of the seal member position measuring machine into the notch of the mounting plate. It is an enlarged view showing a state in the middle of inserting the protrusion of the insert of the seal member position measuring machine into the notch of the mounting plate. It is an enlarged view which shows a mode that the projection part of the insertion body of the seal member position measuring machine was engage|inserted in the notch part of a mounting plate equally. FIG. 3 is a block diagram of a control system provided in the main body of the seal member position measuring machine; It is sectional drawing of the pipe joint part which showed a mode when measuring the position of a sealing member using a sealing member position measuring machine similarly. It is a perspective view of the same seal member position measuring machine, and shows the 2nd attachment attitude|position which made the other end part of an insertion body insertable in the clearance gap between an insertion port and a receiving port. FIG. 10 is a diagram of a thin insert attached to the measuring machine body of the seal member position measuring machine according to the second embodiment of the present invention; It is a figure of the thick insert attached to the measuring machine main body of a seal member position measuring machine similarly. It is a sectional view of a pipe joint. FIG. 10 is a cross-sectional view of a pipe joint portion showing a state in which the position of a seal member is measured using a conventional seal member position confirming device;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same members as those of the conventional one described above, and detailed description thereof will be omitted.

(First embodiment)
In the first embodiment, as shown in FIGS. 1 to 5, 1 is a seal member position measuring machine for measuring the position of the seal member 105 of the pipe joint 106. FIG. A seal member position measuring machine 1 has a measuring machine main body 2, an insert 3 provided in the measuring machine main body 2, and a detection rod 4 which can be retracted.

The measuring instrument main body 2 has a main body portion 7 made of a square box-shaped case and a mounting plate 8 (an example of an insert mounting portion) attached to the main body portion 7 .

The insert 3 is an elongated plate-like member, and can be inserted from the outside of the socket 104 into the gap 136 (see FIG. 14) between the socket 104 and the insertion slot 102 to abut against the seal member 105, It is detachably attached to the mounting plate 8 .

As shown in FIGS. 2 and 6, the mounting plate 8 is a rectangular flat plate, and has a notch portion 9 (an example of a first fitting portion) formed therein. Further, as shown in FIGS. 7 and 8, a protrusion 11 (an example of a second fitting portion) is provided at the central portion of the insert 3 in the longitudinal direction. The insert 3 is attached to the mounting plate 8 by fitting the protrusion 11 into the notch 9 , and the insert 3 is removed from the mounting plate 8 by separating the protrusion 11 from the notch 9 .

The protrusion 11 has a protrusion main body 13 having a circular cross section and a flange 14 provided at the tip of the protrusion main body 13 . The flange 14 has a diameter larger than that of the projection main body 13 .
As shown in FIG. 6, the notch 9 includes an open portion 18 opened on one side 17 on the insertion direction 16 side when inserting the insert 3 into the gap 136 (see FIG. 14), and a projection 11. It has a narrow width portion 21 having an interval 20 narrower than the diameter 19 of the projection main body 13 (see FIGS. 8 and 10), and a deep stop portion 22 having the same diameter as the diameter 19 of the projection main body 13 .

The narrow portion 21 is located between the open portion 18 and the back stop portion 22, and the open portion 18 has a pair of inclined portions 24 that taper from the narrow portion 21 toward one side 17 of the mounting plate 8. there is Incidentally, the flange portion 14 of the protrusion 11 has a diameter larger than that of the inner stop portion 22 .

A notch 27 (slit) is formed in the mounting plate 8 in a straight line. One end of the notch portion 27 communicates with the back stop portion 22 of the notch portion 9 . The other end of the notch 27 communicates with a circular hole 28 formed in the mounting plate 8 . The notches 27 and the holes 28 penetrate both the front and back surfaces of the mounting plate 8 in the thickness direction of the mounting plate 8 . The inner diameter B of the hole portion 28 is larger than the width W1 of the notch portion 27 and smaller than the width W2 of the back stop portion 22 of the notch portion 9 .

As shown in FIGS. 2 and 9, a mounting recess 38 is formed in the body portion 7 of the measuring instrument body 2 . The mounting plate 8 is fitted into the mounting concave portion 38 of the main body portion 7 and is mounted on the main body portion 7 by two (an example of a plurality of) screw members 30 (an example of a fastening member). As shown in FIGS. 2 and 10, the mounting recess 38 has a pair of side wall surfaces 39 facing each other in the width direction of the measuring instrument main body 2, and a predetermined gap is provided between the side wall surfaces 39 and the mounting plate 8. 40 are formed.

The notch 27 is positioned between both screw members 30 facing each other in the width direction 29 of the notch 27 (see FIG. 11).

As shown in FIG. 2, two through holes 31 are formed in the mounting plate 8, and two screw holes 32 are formed in the main body 7 of the measuring instrument main body 2. As shown in FIG. The screw member 30 is inserted through the through hole 31 and screwed into the screw hole 32 .
As shown in FIG. 11, the narrow width portion 21 moves from the projection main body 13 of the projection 11 through the narrow width portion 21 and into the inner stop portion 22 from the open portion 18 of the notch portion 9 . 13 and slightly expands in the width direction 34. At this time, the mounting plate 8 is slightly deformed in the width direction 34 of the narrow width portion 21, and the cut portion 27 is also slightly expanded in the width direction 29.例文帳に追加

Further, as shown in FIG. 12, in a state where the projection body 13 of the projection 11 passes through the narrow width portion 21 and is fitted into the back stop portion 22, the narrow width portion 21 expands in the width direction 34 and then contracts. At this time, the mounting plate 8 returns to its original shape from the deformed state, and the cut portion 27 also shrinks from the expanded state in the width direction 29 and returns to its original width. In this way, the mounting plate 8 is slightly elastically deformable in the width directions 29 and 34, and is made of resin or the like having elasticity. The presence of the gap 40 allows deformation in the width direction 29,34.

As shown in FIG. 7, the insert 3 has a thickness ta at one end 3a and a thickness tb at the other end 3b. That is, the insert 3 has a projection 3c on the other end 3b, and thereby the thickness tb of the other end 3b of the insert 3 is set thicker than the thickness ta of the one end 3a of the insert 3. (thickness ta<thickness tb), for example, the thickness ta is set to 2 mm and the thickness tb is set to 4 mm. 1, 4, and 14, one end portion 3a is inserted into the gap 136 between the insertion port 102 and the socket 104, and the other end portion 3a, as shown in FIG. It can be replaced with a second mounting posture in which the portion 3b is inserted into the gap 136 (see FIG. 14).

As shown in FIGS. 2, 3, and 9, the main body 7 of the measuring instrument main body 2 has lateral vibration prevention grooves for preventing lateral vibration of the insert 3 in the rotational direction 42 about the projection 11. As shown in FIGS. 43 (an example of a lateral vibration prevention portion). The lateral vibration prevention groove 43 communicates with the mounting recess 38 . The insert 3 can be freely fitted into and removed from the groove 43 for preventing lateral vibration, and as shown in FIG. As shown, the insert 3 is fitted into the anti-vibration groove 43 . As shown in FIG. 4, the depth C of the lateral vibration prevention groove 43 is set to be greater than the thickness tb (see FIG. 7) of the other end portion 3b of the insert 3 (thickness tb≦depth C ).

Also, as shown in FIG. 8, the length between the protrusion 11 of the insert 3 and the protrusion 3c of the other end 3b is E1, and as shown in FIG. The length E1 is set longer than the length E2 (length E1>length E2).

As shown in FIG. 1, the detection rod 4 is biased in a projecting direction 45 projecting from the measuring instrument body 2 by a spring (not shown) incorporated in the measuring instrument body 2. As shown in FIG. By abutting the end face 104a of the socket 104 when the insert 3 is inserted into the gap 136, the insert 3 can be retracted into the measuring instrument main body 2 by a dimension corresponding to the insertion dimension.

As shown in FIG. 13, inside the body portion 7 of the measuring instrument body 2, a retraction dimension L (retraction distance) when the detection rod 4 retracts into the measuring instrument body 2 from the maximum projecting position P1 is provided. A retraction dimension detection unit 46 for detection, a calculation unit 47, a communication unit 48, a storage unit 49, and a control unit 50 are provided.

The retraction dimension detector 46 detects the retraction dimension L based on the number of rotations and the rotation angle of the gear 52 meshing with the detection rod 4 when the detection rod 4 moves in the longitudinal direction.

The calculation unit 47 calculates the distance D (see FIG. 14) from the end face 104a of the socket 104 to the seal member 105 based on the retraction dimension L detected by the retraction dimension detector 46. FIG.

The communication unit 48 has a function of transmitting the distance D calculated by the calculation unit 47 to an external mobile terminal, server, or the like.

The storage unit 49 stores the retraction dimension L detected by the retraction dimension detection unit 46, the distance D obtained by the calculation unit 47, and the like.

A method of measuring the position of the seal member 105 of the pipe joint 106 using the seal member position measuring device 1 will be described below.

As shown in FIGS. 1 and 14, first, in a state where the insert 3 is switched to the first mounting position, one end 3a of the insert 3 having a smaller thickness ta is inserted from the outside of the receptacle 104 into the insertion opening 102. and the socket 104, the tip of the detection rod 4 comes into contact with the end face 104a of the socket 104. Further, when the insert 3 is inserted into the gap 136, the detection rod 4 is pushed into the gap 136 of the spring. It retreats into the measuring instrument main body 2 against the urging force.

When one end 3a of the insert 3 hits the seal member 105, the insert 3 cannot be inserted any further, and the detection rod 4 is moved by a distance corresponding to the insertion dimension of the insert 3 at this time. The detection rod 4 is retracted into the main body 2 , and the retraction dimension L of the detection rod 4 at this time is detected by the retraction dimension detector 46 . A distance D to the seal member 105 is calculated.

The distance D thus measured is transmitted from the communication unit 48 to an external mobile terminal, server, or the like, and displayed on a display screen or the like of the mobile terminal or server. At this time, if the displayed value of the distance D is within the acceptable range, it is determined that the seal member 105 is in a normal position.

Further, if the displayed value of the distance D is out of the acceptable range, the insert 3 is switched from the first mounting posture to the second mounting posture as shown in FIG. The other end 3b, which is thicker, is inserted into the gap 136 (see FIG. 14) between the insertion port 102 and the socket 104 from the outside of the socket 104, and in the same manner as described above, the seal member Measure the distance D to 105 again.

Then, if the value of the distance D displayed on the display screen of the mobile terminal or server is within the acceptable range, it is determined that the seal member 105 is in the normal position. Conversely, if the value of the distance D displayed on the display screen of the mobile terminal or server is outside the acceptable range, it is determined that the seal member 105 is in an abnormal position, and the pipe joint 106 is dismantled and inspected.

In the method for measuring the position of the seal member 105 as described above, the insertion body 3 is switched from the first mounting posture (see FIG. 1) to the second mounting posture (see FIG. 15) as follows.

First, the protrusion 11 of the insert 3 in the first mounting posture is removed from the notch 9 of the mounting plate 8 . As a result, the insert 3 is removed from the mounting plate 8, so that the insert 3 can be easily removed from the main body 2 of the measuring instrument.

Next, the direction of the insert 3 is changed by 180° from the first mounting position to the second mounting position in the detached state. After that, the protrusion 11 of the insert 3 is fitted into the notch 9 of the mounting plate 8 . As a result, as shown in FIG. 15, the insert 3 can be attached to the mounting plate 8 in a state in which it has been switched to the second attachment posture, so that the insert 3 can be easily attached to the measuring instrument main body 2 . At this time, the one end portion 3a side of the insert 3 is fitted into the lateral anti-vibration groove 43 .

Similarly, when the insert 3 is switched from the second mounting posture (see FIG. 15) to the first mounting posture (see FIG. 1), the protrusion 11 of the insert 3 in the second mounting posture is attached to the mounting plate 8. The insertion body 3 is detached from the notch 9, and the direction is changed by 180° from the second mounting posture to the first mounting posture in the detached state. After that, by fitting the protrusion 11 of the insert 3 into the notch 9 of the mounting plate 8, as shown in FIG. be done. At this time, the other end portion 3 b side of the insert 3 is fitted into the lateral anti-vibration groove 43 .

When the protrusion 11 of the insert 3 is fitted into the notch 9 of the mounting plate 8 as described above, the protrusion main body 13 of the protrusion 11 is inserted into the opening of the notch 9 as shown in FIGS. From 18 , it passes through the narrow width portion 21 and is fitted into the inner stop portion 22 . Conversely, when the protrusion 11 of the insert 3 is removed from the notch 9 of the mounting plate 8, the protrusion main body 13 of the protrusion 11 passes through the narrow portion 21 from the inner stop 22 of the notch 9 and is released. It leaves to the outside through the part 18 .

As shown in FIG. 11, when the protrusion 11 is fitted into or removed from the notch 9, the narrow portion 21 of the notch 9 is pushed by the protrusion main body 13 and becomes wide. Since the projection 11 is slightly expanded in the direction 34 and the cut portion 27 is slightly expanded in the width direction 29 together with the narrow portion 21 , the projecting portion 11 can be smoothly put in and taken out of the notch portion 9 . As a result, the insert 3 can be easily attached to and detached from the main body 2 of the measuring instrument.

In addition, when the cut portion 27 expands in the width direction 29 together with the narrow portion 21 as described above, the stress acting on the other end of the cut portion 27 is dispersed by the hole portion 28, so that the other end of the cut portion 27 The stress concentration in the portion is relaxed, and damage to the other end of the cut portion 27 can be prevented.

In addition, since part of the load generated when the notch 27 expands in the width direction 29 as described above is supported by the double screw member 30, excessive expansion of the notch 27 can be prevented. Thereby, the stress applied to the hole 28 is reduced.

Also, as shown in FIG. 12, when the protrusion 11 is fitted into the notch 9 and the insert 3 is attached to the measuring instrument main body 2, the protrusion main body 13 of the protrusion 11 is positioned at the back of the notch 9. 22, and the narrow width part 21 shrinks from the state expanded in the width direction 34 and returns to the original space 20, so that the projection main body 13 inadvertently separates from the back stop part 22 of the notch part 9. can be prevented. At this time, as shown in FIG. 5, the mounting plate 8 is sandwiched between the flange 14 of the projection 11 and the insert 3, so that the insert 3 can be prevented from accidentally falling off from the mounting plate 8. can be prevented.

1, 12, and 15, when the projection 11 is fitted into the notch 9 and the insert 3 is attached to the main body 2 of the measuring instrument, the insert 3 is positioned in the groove 43 for preventing lateral vibration. 3, it is possible to prevent lateral swinging of the insert 3 in a rotational direction 42 about the protrusion 11. As shown in FIG.

The length E1 (see FIG. 8) between the protrusion 11 of the insert 3 and the protrusion 3c of the other end 3b is the length E2 (see FIG. 6) between the side 17 and the other side 36 of the mounting plate 8. ), when attaching the insert 3 to the measuring instrument main body 2 in the state of switching to the first attachment posture, as shown in FIG. In this state, the projection 11 of the insert 3 can be fitted into the notch 9 of the mounting plate 8 by sliding the insert 3 . As a result, it is possible to prevent the projection 3c of the insert 3 from contacting the mounting plate 8 and hindering the fitting, and the projection 11 of the insert 3 can be easily fitted into the notch 9 of the mounting plate 8. be able to.

(Second embodiment)
In the first embodiment described above, as shown in FIG. 7, the thickness ta of the one end 3a of the insert 3 is different from the thickness tb of the other end 3b, and the insert 3 is oriented 180 degrees. By changing the angle, the insert 3 can be replaced between the first mounting posture (see FIG. 1) and the second mounting posture (see FIG. 15). Thus, two inserts 61 and 62 are prepared, one insert 61 having a thickness ta and the other insert 62 having a thickness tb (thickness ta<thickness tb).

According to this, first, one insert 61 having a thinner thickness ta is attached to the measuring instrument main body 2 and the position of the seal member 105 is measured. The position of the seal member 105 is measured by removing it from the machine main body 2 and attaching the other insert 62 having a thickness tb larger than the thickness ta to the measuring machine main body 2 .

Although two types of inserts 61 and 62 with different thicknesses are prepared in the second embodiment, three or more types of inserts with different thicknesses may be prepared.

In the first and second embodiments, as shown in FIG. 2, the notch 9 is provided in the mounting plate 8 and the projection 11 is provided in the insert 3. It may be provided on the body 3 and the protrusion 11 may be provided on the mounting plate 8 . Also, the notch 9 is given as an example of the first fitting portion, and the protrusion 11 is given as an example of the second fitting portion. It is not limited.

In the above-described first and second embodiments, as an example of the lateral vibration preventing portion, as shown in FIG. For example, the body portion 7 is provided with a pair of lateral vibration preventing protrusion members, the insert 3 is freely fittable between the pair of lateral vibration preventing protrusion members, and the protrusion of the protrusion 11 The insert 3 may be fitted between the pair of anti-vibration projection members in a state in which the main body 13 is fitted in the inner stop portion 22 of the notch portion 9 .

In the first and second embodiments described above, as shown in FIG. A plurality of screw members 30 may be used.

In the first and second embodiments, as shown in FIG. 2, the main body 7 of the measuring instrument main body 2 and the mounting plate 8 are separate structures, and the mounting plate 8 is detachably attached to the main body 7. However, the mounting plate 8 and the body portion 7 may be integrally constructed.

In the first and second embodiments, the thickness ta of the insert 3 is set to 2 mm, and the thickness tb is set to 4 mm, but the values are not limited to these values.

1 seal member position measuring device 2 measuring device main body 3 insert 4 detection rod 7 main body 8 mounting plate (insert mounting portion)
9 notch (first mating part)
11 protrusion (second mating part)
16 Insertion direction 18 Open portion 21 Narrow width portion 27 Cut portion 28 Hole portions 29, 34 Width direction 30 Screw member (fastening member)
42 Rotation direction 43 Lateral vibration prevention groove (lateral vibration prevention portion)
45 Projection direction 101 One pipe 102 Insertion port 103 Other pipe 104 Receptacle 104a End surface 105 Sealing member 106 Pipe joint 136 Gap ta Thickness of one end of insert tb Thickness of other end of insert

Claims (7)

a spigot formed at one end of the tube is inserted into a socket formed at the end of the other tube;
A seal member position measuring instrument for measuring the position of a seal member in a pipe joint configured such that an annular seal member is compressed between an outer peripheral surface of a spigot and an inner peripheral surface of a socket,
having a measuring instrument main body, an insertion body provided in the measuring instrument main body, and a retractable detection rod,
The insert is inserted from the outside of the socket into the gap between the socket and the insertion opening and can abut against the sealing member,
The detection rod is biased in the direction of projection from the main body of the measuring instrument, and by contacting the end face of the socket when the insert is inserted into the gap, only the dimension corresponding to the insertion dimension of the insert is measured. It is possible to enter the machine body,
The main body of the measuring instrument has an insert attachment part to which the insert can be attached,
A first fitting portion is provided in the insert mounting portion,
The insert is provided with a second fitting portion,
The insert is attached to the insert mounting portion by fitting the second fitting portion to the first fitting portion,
A seal member position measuring machine, wherein the insert body is removed from the insert mounting part by disengaging the second fitting part from the first fitting part. The first fitting portion is a notch,
the second fitting portion is a protrusion,
The notch has an open portion that is open in the direction in which the insert is inserted into the gap, and a narrow portion that is narrower than the protrusion,
The projecting portion can be freely fitted into and removed from the notch portion through the narrow portion from the open portion,
The narrow portion is pushed by the protrusion and expands in the width direction while the protrusion is being fitted into the notch,
2. The seal member position measuring machine according to claim 1, wherein the narrow portion is contracted from a state expanded in the width direction in a state in which the projection passes through the narrow portion and fits into the notch. 3. The seal member position measuring machine according to claim 2, wherein the measuring machine main body has a lateral vibration preventing portion for preventing lateral vibration of the insert body in a rotational direction about the protrusion. The measuring instrument main body has a main body,
The insert mounting portion is a mounting plate attached to the main body,
A notch is formed in the mounting plate,
4. The seal member position measuring machine according to claim 2, wherein one end of the notch communicates with the notch. The other end of the notch communicates with a hole formed in the mounting plate,
5. The seal member position measuring machine according to claim 4, wherein the hole is wider than the notch and narrower than the notch. The mounting plate is attached to the main body by a plurality of fastening members,
The cut portion is positioned between a pair of fastening members facing each other in the width direction of the cut portion,
When the narrow width portion is pushed by the projection and expands in the width direction while the protrusion is being fitted into the notch, the notch expands in the width direction together with the narrow width portion. The seal member position measuring machine according to claim 5. the insert has a different thickness at one end and a thickness at the other end,
The insert body can be replaced between a first mounting posture in which one end is inserted into the gap between the socket and the receptacle, and a second mounting posture in which the other end is inserted into the gap between the socket and the receptacle. The sealing member position measuring machine according to any one of claims 1 to 6, characterized in that:

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