JPH07217784A - Device for blocking branch port, and device for attaching thereof - Google Patents

Abstract

PURPOSE:To provide a blocking device for a branch port, which can be used for fluid pipes having different diameters without the necessity of a holder, and which has a less number of components so as to be manufactured at a low cost. CONSTITUTION:A blocking device for a branch port, is composed of a ring-like seal member 18 fitted in an opening 2, a retainer 10 inserted in the seal member 18, a retaining ring 20 provided on the retainer 10 and adapted to make contact with an outward directed end surface of the seal member 18, a moving member 21 for causing the retaining ring 20 and the retainer 10 to compress the seal member 18 which is therefore deformed in a radial direction so that the outer peripheral surface of the seal member 18 is made into close contact with the inner peripheral surface of the opening 2, a locking member 23 which is set at its one end part on the retainer 10 so as to be radially movable, and which is adapted to be engaged with the inner peripheral surface of the pipe 1 by projecting the end part thereof from the retainer 10, and a manipulating member 22 provided in the retainer 10 so as to be movable axially thereof, for pulling the end part of the locking member 23 into the retainer 10 by pressing the locking member at its end part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closing device for closing a branch port formed in a fluid pipe, and a mounting device for mounting the blocking device to the branch port by a waterless construction.

[0002]

2. Description of the Related Art A large number of branch pipes are connected to a fluid pipe such as a main pipe of water supply. Some of these branch pipes may later need to be removed for some reason, and the branch opening must be blocked. FIG. 19 is an axial cross-sectional view showing an example of a closing device for closing the branch opening in such a case, which is disclosed by the applicant in Japanese Patent Application Laid-Open No. 2-120596. The branching port closing device shown in this figure is a pair of half-tube shaped fittings of a main pipe 1 in which a water stopcock 3 is fitted to a branching port 2 of a main pipe 1 from the outside and the water stopcock 3 is covered. Holders 4, 5
It is configured roughly by attaching. In this closing device, the head 3a of the water stopcock 3 is housed in a recess 4a formed on the inner peripheral surface of the holder 4, and the bolt 6 and the nut 7 attached to the holders 4 and 5 are tightened to remove the water stopcock 3 Head 3
The peripheral portion of a is pressed around the branch opening 2 to close it. Reference numeral 8 in the drawing is a plug for ensuring watertightness.

[0003]

However, in the above-mentioned closing device, since the water stopper 3 is pressed against the periphery of the branch port 2 by the holders 4 and 5, not only the size of the branch port 2 but also the size of the branch port 2 is reduced. Holders 4, 5 which also fit the diameter of the tube 1 must be manufactured. For this reason, a large number of holders 4 and 5 having different sizes are required as an inventory, and a large amount of cost is required to manage them. Also, the holder 4,
No. 5 is the largest of the parts and occupies a large proportion of the total price, so that the blocking device has been a factor that makes it expensive.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and does not require a holder as in the prior art. Therefore, the present invention can be applied to fluid pipes of various diameters, and the number of parts is small and the cost is low. An object of the present invention is to provide a simple branching port closing device (hereinafter, simply referred to as a closing device), and a mounting device that attaches such a closing device to the branching port by uninterrupted water work.

[0005]

SUMMARY OF THE INVENTION A branch port closing device according to the present invention includes a ring-shaped seal member which is inserted into an opening provided on the surface of a fluid pipe and an inner peripheral surface of the seal member. And a pressing piece that is inserted so as to come into contact with the end surface that faces inward, a pressing ring that is provided on the pressing piece and that contacts the end surface that faces the outside of the seal member, and this pressing ring is relative to the pressing piece. By moving the sealing member to the radial direction by compressing the seal member with the pressing ring and the pressing piece, and moving means for bringing the outer peripheral surface of the seal member into close contact with the inner peripheral surface of the opening, and the end portion of the pressing piece having a radius. A locking member that is movably provided in the direction, and that engages with the inner peripheral surface of the fluid pipe when the end portion is projected from the pressing piece; and an end portion that is provided inside the pressing piece and is movable in the axial direction. By pressing the locking member It is characterized by comprising an operation member to pull the interior of the frame holding the end of the stop member.

As a preferred specific example which can further simplify the structure, the locking member is a leaf spring, and the operating member is a pin. Then, the operating member is moved by an external force to bend the leaf spring and pull one end of the spring member into the holding piece,
When the force from the outside is removed, the leaf spring returns to its original position by the repulsive force of the leaf spring, causing one end of the locking member to project into the fluid pipe. The spring member is composed of a leaf spring whose total length in the unloaded state exceeds the width of the opening, and both ends of the spring member are supported movably in the radial direction by grooves provided in the pressing piece. On the other hand, the operating member bends by pressing the substantially central portion of the locking member.

As the locking member, a plate material which is movable in the radial direction of the pressing piece may be used instead of the plate spring. In this case, the operating member causes the locking member to move radially outward by pressing the end of the locking member, so that one end of the operating member projects from the pressing piece. Specifically, an inclined surface that is inclined with respect to the moving direction of the operating member is formed at the other end of the locking member, and the end of the operating member is brought into contact with this inclined surface. In addition, an inclined surface parallel to the inclined surface of the locking member is formed at the end of the operation member, and both inclined surfaces are engaged with each other by a dovetail groove parallel to the inclined surface so that both inclined surfaces can be relatively moved. It can also be slidably connected to. further,
It is also possible to form the end portion of the operating member into a substantially spherical shape and press the inclined surface of the locking member.

As the structure for moving the locking member, instead of the structure for moving the operating member in the axial direction as described above,
The operating member can be provided rotatably around the axis of the pressing piece, and the end of the operating member can be provided with a cam for pressing the end of the locking member. The cam in this case has an oval shape, and its outer peripheral surface is brought into contact with the end surface of the locking member.

More specifically, the pressing piece has a disk-shaped piece body and a male screw portion provided coaxially with the piece body, and the moving means is a nut screwed to the male screw portion. Composed. Further, the pressing ring is slidably fitted in the outer peripheral portion of the piece main body in the axial direction and is prevented from rotating relative to the piece main body. Further, the operating member is composed of a shaft inserted into a hole provided coaxially with the pressing piece. And this invention also provides the mounting apparatus which attaches the closure device comprised in this way to a branch opening by uninterrupted water construction.

That is, in the mounting apparatus of the present invention, the frame is provided with the rod assembly in which the tightening rod, the connecting rod and the operating rod are coaxially provided in order from the outside so as to be movable in the axial direction. A socket wrench is provided at the tip, the connecting rod is provided slidably and rotatably with respect to the tightening rod, the rear end projects from the rear end of the tightening rod, and the female screw is provided at the tip. Is provided, the operating rod is provided slidably and rotatably with respect to the connecting rod, and the rear end portion of the operating rod is projected from the rear end portion of the connecting rod, and the front end portion thereof is a locking member of the closing device. It has a shape that can be inserted into the operation hole for driving, and an out frame that supports the tightening rod in the liquid-tight state in a slidable and rotatable manner, and an opening. A flange portion connected to a valve means which is, the flange portion and is bridged to the above-out frame, is characterized in that a tube to shield the periphery of the distal end portion of the rod assembly from the outside in a liquid-tight manner.

[0011]

First, the operating member is moved in the axial direction of the pressing piece to press the locking member, and the end portion of the locking member is pulled into the pressing piece. In this state, the closing device is inserted into the opening of the fluid pipe, and the operating member is returned to its original position. As a result, the end portion of the locking member projects from the pressing piece and engages with the inner peripheral surface of the fluid pipe, and the closing device does not come off from the opening portion. Next, the sealing member is compressed by bringing the pressing piece and the pressing ring close to each other. Then, the seal member is deformed so as to expand radially outward, and the outer peripheral surface of the seal member comes into close contact with the inner peripheral surface of the opening. Thus, in the closure device of the present invention, by deforming the seal member radially outward, the gap between the seal member and the opening is sealed,
Any diameter of the fluid pipe can be applied as long as the size of the sealing member is suitable for the opening.
Further, since the retaining mechanism for projecting the locking member from the pressing piece is configured, the opening can be reliably closed even when the fluid pressure is high.

When the closing device is attached to the opening of the fluid pipe by the attaching device having the above-described structure, first, the female screw portion of the connecting rod is screwed into the male screw portion of the pressing piece. Next, the tightening rod is advanced to fit the socket wrench at the tip of the tightening rod into the nut of the closing device. Next, the tip portion of the operating rod is inserted into the operating hole of the closing device, the shaft inside the pressing piece is moved, and the locking member is pulled inside the pressing piece. Next, the flange portion is attached to valve means such as a water control valve to open the valve means. In this state, the rod assembly is moved toward the opening and the closing device is inserted into the opening of the fluid pipe. Next, the tightening rod is rotated relative to the connecting rod, and the nut is tightened in the male screw portion of the pressing piece. As a result, the pressing ring moves in the axial direction relative to the pressing piece, and the seal member is compressed between the pressing ring and the pressing piece. When using the structure in which the locking member is projected from the bridge body by rotating the shaft inside the pressing piece or moving it in the axial direction, insert the closing device into the opening and then operate the operating rod. , The locking member is projected from the pressing piece.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a horizontal cross-sectional view showing a state in which the closure device A of the embodiment is attached to a branch port 2 of a main pipe 1, and FIG. In the figure, reference numeral 10 is a pressing piece. Presser piece 1
As shown in FIGS. 5 to 7, reference numeral 0 includes a piece main body 11 and a holding portion 12 extending around the lower end of the piece main body 11. The piece main body 11 includes a disc-shaped support portion 13
And a threaded portion 14 projecting from the center of the support portion 13, the threaded portion 14 having a large-diameter threaded portion 14a in the lower half,
It consists of a small diameter screw portion 14b in the upper half. As shown in FIG. 7B, a flat grip portion 14c is formed on the side portion of the large diameter screw portion 14a. Further, in the central portion of the piece main body 11, there is provided a first hole 15 having a circular cross section which is opened at the lower surface thereof.
a, a second hole 15b having a circular cross section smaller than the first hole 15a, and a third hole (operation hole) 15c having a smaller cross section and a rectangular shape than the second hole 15b. There is.

The pressing portion 12 has a ring shape in plan view, and its diameter is set to be slightly smaller than the diameter of the branch port 2. Further, the pressing portion 12 has an arc shape with a predetermined curvature in a side view. The holding portion 12 is formed integrally with the piece body 11 so that the support portion 13 of the piece body 11 fits into the central opening 12a. Also,
A groove 12b extending in the radial direction is formed in the uppermost raised portion of the upper surface of the pressing portion 12. The groove 12b has a rectangular cross section and is continuous with a hole 13a of the same shape and size formed in the support portion 13 of the piece main body 11 to form a guide 16 for accommodating a claw 23b described later.

A seal member 18 is fitted to the pressing piece 10 thus constructed so as to be in close contact with the pressing portion 12 and the supporting portion 13. The seal member 18 is made of rubber, elastically deformable synthetic resin, or the like, and has a ring shape in plan view as shown in FIG. Further, the seal member 18 has an arc shape corresponding to the shape of the pressing portion 12 in a side view. The diameter of the seal member 18 is smaller than the inner diameter of the branch port 2 in the unloaded state,
It is deformed in the radial direction by being compressed by the pressing ring 20 and the pressing portion 12 fitted to each other, and is in watertight contact with the inner peripheral surface of the branch port 2. In FIG. 1, reference numeral 1a is a mortar lining.

As shown in FIG. 8, the presser ring 20 comprises a disc-shaped top plate portion 20a and a pressing plate portion 20b extending perpendicularly to the top plate portion 20a from its edge. The pressing plate portion 20b has the seal member 1 in a side view.
It has an arc shape corresponding to the shape of 8. In addition, a hole 20c having the same shape as the cross-sectional shape of the large-diameter screw portion 14a of the pressing piece 10 and loosely fitted with the large-diameter screw portion 14a is formed in the central portion of the top plate portion 20a. The lower surface of the pressing ring 20 configured as described above has the seal member 1
It is fitted to the support portion 13 of the presser piece 10 in a state of being aligned with the upper surface of 8, and is pressed toward the seal member 18 side by the nut 21 attached to the large diameter screw portion 14a.

Next, the pressing piece 10 is provided with a retaining mechanism having the following structure. As shown in FIG. 1, in the second hole 15b and the third hole 15c of the pressing piece 10,
A shaft (operation member) 22 is slidably inserted in the axial direction. The lower half of the shaft 22 has a circular cross section, and the upper half has a rectangular cross section corresponding to the cross sectional shape of the third hole 15c. On the other hand, a stopper (locking member) 23 is attached to the lower end of the shaft 22 with a bolt 24.

As shown in FIG. 10, the stopper 23 is composed of a leaf spring 23a and claws 23b fixed to both ends of the leaf spring 23a. Incidentally, reference numeral 23c in the drawing
Is a hole through which the bolt 24 penetrates. The stopper 23 configured as described above is attached to the shaft 22 with the claw 23b housed in the guide 16. And
When the leaf spring 23a is not bent, the tip of the claw 23b projects from the guide 16 and engages with the inner peripheral surface of the main pipe 1, as shown in FIG. In FIG. 1, reference numeral 25 is an O-ring.

Next, an embodiment of a mounting device for mounting the closure device A having the above-mentioned configuration on the branch port 2 will be described with reference to FIGS.
Will be described with reference to. In FIG. 11, reference numeral 30 is a frame that is a skeleton of the mounting device.
Is a pair of out frames 31, 31 and two columns 32
It is configured by connecting with. As shown in FIG. 13, the out frame 31 has an inverted triangular shape, and bolts 32a for mounting the columns 32 are located at both ends thereof.
A connection flange (flange portion) 34 is fixed to an out frame (frame) 31 on the tip side (left side in FIG. 1) via a pipe 33. This connection flange 34 is
It is for connecting to a thrust flange 80 described later. In addition, a valve (not shown) for confirming the presence or absence of water leakage of the closing device A is attached to a portion indicated by reference numeral 33a in FIG. Further, in FIG. 11, reference numeral 34a is an O for ensuring watertightness during work.
It's a ring.

Next, the pillar 32 is attached to the center frame 3
5 is supported by bearings 35a so as to be slidable in the front-rear direction. In the center of the lower end of the center frame 35, as shown in FIG.
2, the screw receiver 36 is attached, and the screw receiver 36 is attached.
A feed screw 37 parallel to the support column 32 is inserted through. Both ends of the feed screw 37 are connected to the out frames 31, 3
It is rotatably supported by the bearings 38 and 39 attached to 1. The rear end portion of the feed screw 37 is formed in a rectangular shape in cross section, and a detachable handle or the like is attached thereto and rotated to move the center frame 35 in the front-rear direction.

A rod assembly R, which is roughly composed of a tightening rod 50, a connecting rod 60, and an expansion rod (operation rod) 70, is rotatably mounted on the center frame 35 and the tip-side out frame 31 via bearings 40 and 41. Moreover, it is slidably supported in the axial direction. The tightening rod 50 has a pipe shape, and the pressing piece 1
A socket wrench 51 that fits with the nut 21 of No. 0 is fixed via a coupling 52. A hexagonal nut portion (engagement portion) 53 is fixed to the rear end portion of the tightening rod 50. The connecting rod 60 is inserted into the tightening rod 50 configured as described above so as to be rotatable and axially slidable with respect to the tightening rod 50.

The connecting rod 60 has a pipe shape, and a female screw (female screw portion) 61 attached to the small-diameter screw portion 14b of the pressing piece 10 is fixed to the tip portion of the connecting rod 60. The rear end portion of the connecting rod 60 is projected from the rear end portion of the tightening rod 50 and is supported by the bearing 41. A hexagonal nut portion (engagement portion) 62 having an outer diameter larger than the inner diameter of the bearing 41 is formed at the rear end portion of the connecting rod 60.
A spacer 63 is detachably attached by a screw 63 a between the hexagonal nut portion 62 and the rear end surface of the tightening rod 50. The spacer 63 is a tightening rod 5.
This is for setting the relative position in the axial direction between 0 and the connecting rod 60. Further, a male screw 64 having an outer diameter larger than the inner diameter of the bearing 41 is formed at the end of the connecting rod 60 protruding from the bearing 41. This allows the connecting rod 60 to move relative to the bearing 41 by the length of the cylindrical portion between the male screw 64 and the hexagonal nut portion 62.

A screw cap 65 is attached to the male screw 64 of the connecting rod 60. A flat spanner hook 65a is formed on the side surface of the screw cap 65, and a hole 65b is formed on the end surface thereof. Inside the screw cap 65, an expansion rod retainer 66 having a rear end portion protruding from the hole 65b is rotatably accommodated. Expansion rod retainer 66
Has a substantially cylindrical shape, and a large-diameter portion formed at its end is engaged with the inner surface of the screw cap 65 so as not to come off. A female screw 66 is formed on the inner peripheral surface of the expansion rod retainer 66.
a is formed. Then, by tightening the screw cap 65 on the male screw 64, the expansion rod retainer 66 is fixed. Further, the end portion of the extension rod retainer 66 protruding from the screw cap 65 has a structure shown in FIG.
As shown in, a hexagonal nut portion 66b is formed.
Then, the expansion rod 70 is inserted into the connecting rod 60 configured as described above so as to be rotatable and axially slidable with respect to the connecting rod 60.

The tip portion 71 of the expansion rod 70 is provided with the pressing piece 1.
It has a rectangular cross section so that it can be loosely fitted in the third hole 15c. Further, at the rear end portion of the expansion rod 70, a screw 72 that is screwed with the female screw 66a of the expansion rod retainer 66 is formed. Further, a spanner hook 73 having a rectangular cross section is formed at the end of the extension rod 70 protruding from the extension rod retainer 66. In the figure, reference numerals 75 and 76 are O
It's a ring.

Next, the mounting device configured as described above is mounted on the end surface of the thrust flange 80 as shown in FIG. FIG. 3 is a cross-sectional view showing a state in which the blocking device A of the embodiment is attached to the branch port 2 of the main pipe 1,
In the figure, reference numeral 95 is a split T-shaped tube, and 96 is a water control valve (valve means). The branch pipe is usually the flange 9 of the water control valve 96.
7, the branch pipe is removed and the thrust flange 80 is attached.

The thrust flange 80 is for correcting the misalignment between the center of the branch port 2 and the center of the mounting device, and has the following structure. That is, reference numeral 81 in FIG. 3 is a mounting flange. Mounting flange 8
A movable block 82 is attached to the rear surface of the No. 1. The movable block 82 has a cylindrical center portion, and has four fixed portions 83 radially protruding from the center portion. A hole 84 (see FIG. (A)) is formed in the fixing portion 83, and the pin 8 fixed to the mounting flange 81 is formed in the hole 84.
5 is inserted. The diameter of the pin 85 is sufficiently smaller than the inner diameter of the hole 84, and a screw 85a is formed at its tip. A nut 87 is attached to the screw 85a via a washer 86, and the movable block 82 is pressed and fixed to the attachment flange 81. Also, the mounting flange 81
A support plate 88 facing the fixing portion 83 is fixed to the side surface of the. The support plate 88 has a hole 88a formed therein.

On the other hand, a support plate 88 is provided on the side surface of the fixed portion 83.
A screw 89 penetrating the hole 88a is fixed. The diameter of the screw 89 is set to be sufficiently smaller than the inner diameter of the hole 88a so that the screw 89 can relatively move laterally in the hole 88a. A nut 90 is tightened at the tip of the screw 89 to pull it. Further, the pipe 91 is fixed to the central portion of the movable block 82,
A flange 92 is attached to the end surface of the tube 91.
With such a configuration, in the thrust flange 80, by adjusting the tightening degree of the nut 90,
The position of the movable block 82 can be adjusted, and the center of the mounting device attached to the thrust flange 80 can be aligned with the center of the branch port 2.

Next, the procedure for mounting the closing device A of the embodiment on the branch port 2 using the mounting device having the above-mentioned structure is as follows. 1. The feed screw 37 is rotated to move the center frame 35 forward. 2. The spacer 63 is removed from the connecting rod 60, and the tightening rod 50 is retracted to the nut portion 62 of the connecting rod 60. 3. The expansion rod retainer 66 is rotated and the expansion rod 70 is retracted. 4. The small diameter screw portion 14b of the closing device A is attached to the female screw 61 of the connecting rod 60. 5. The extension rod retainer 66 is rotated to advance the extension rod 70, and the tip portion 71 of the extension rod retainer 66 is moved to the third hole 15 of the retainer piece 10.
Insert in c. At that time, the spanner 7 of the expansion rod 70
By rotating 3 with an appropriate tool, the expansion rod 7
The phase of the tip portion 71 of 0 and the third hole 15c is matched.
Then, the tip end of the expansion rod 70 is inserted into the inner part of the third hole 15c, and the shaft 22 is pressed. Then, the shaft 22 bends the central portion of the leaf spring 23a of the stopper 23, whereby the pawl 23b is housed in the guide 16 and the closing device A can be inserted into the branch port 2. 6. The tightening rod 50 is held by hand and moved forward, and the socket wrench 51 at the tip thereof is fitted into the nut 21 of the closing device A. Next, the spacer 63 is attached to the connecting rod 60 so that the tightening rod 50 does not retract relative to the connecting rod 60. 7. Thrust flange 80 on flange 97 of water control valve 96
Is attached, and the flange 92 of the thrust flange 80 and the center of the branch port 2 are aligned. 8. Attaching device 3 to thrust flange 80
4 is attached and the water control valve 96 is opened. 9. Rotate the feed screw 37 to move the closing device A forward,
Branch port 2 until the pressing ring 20 hits the surface of the main pipe 1.
(See FIG. 4). 10. Rotate the extension rod retainer 66 to rotate the extension rod 70
Retreat. Then, since the shaft 22 becomes free, the leaf spring 23a of the stopper 23 returns to its original straight state by its elastic force, and the claw 23b of the stopper 23 of the closing device A projects from the pressing piece 10. As a result, the claw 23b engages with the inner peripheral surface of the main pipe 1, and the closing device A is prevented from coming off the branch port. 11. Rotate the feed screw 37 to rotate the center frame 35
Only retreat. At this time, hold the rod assembly R by hand so that it will not retract. 12. A ratchet wrench or the like is attached to the hexagonal nut portion 53 of the tightening rod 50, and this is rotated. At that time, the hexagonal nut portion 62 is held with a spanner or the like so that the connecting rod 60 does not rotate. As a result, the nut 21 rotates relative to the pressing piece 10, and the pressing piece 10 is pulled out to the outside along the large-diameter screw portion 14a. As a result, the seal member 18 is compressed by the retainer portion 12 and the retainer ring 20 of the retainer piece 10, and the outer peripheral portion thereof expands in the radial direction and comes into close contact with the branch port 2. Although the connecting rod 60 moves backward together with the presser piece 10, the center frame 3
Since 5 has been retracted beforehand, the connecting rod 60 can slide in the bearing 41. 13. The valve attached to the portion 33a of the pipe 33 is opened to check whether or not there is water leakage. Since the water of the main pipe 1 flows into the pipe 33, the water flows out from the pipe 33 at the beginning when the valve 33a is opened, but when the water stops flowing out, the branch port 2 is closed by the closing device A. I understand. 14. The connecting rod 60 is rotated to remove the female screw 61 from the small diameter screw portion 14b of the pressing piece 10. Further, the tightening rod 50 is retracted to remove the socket wrench 51 from the nut 21. And the center frame 35
Is retracted and the rod assembly R is pulled out from the water control valve 96 and the thrust flange 80. 15. The connecting flange 34 of the mounting device is removed from the thrust flange 80, and the thrust flange 80 is attached to the water control valve 96.
Remove from.

As described above, in the closure device A having the above-described structure, the gap between the seal member 18 and the branch port 2 is sealed by deforming the seal member 18 outward in the radial direction. If the size of 18 is adapted to the branch port 2, any diameter of the main pipe 1 can be used. In addition, since the claw 23b of the stopper 23 is configured to protrude from the pressing piece 10 and engage with the inner peripheral surface of the main pipe 1, even if the fluid pressure is high, the branch port 2
Can be reliably blocked.

In particular, in the above-described embodiment, since the claw 23b is pulled into the pressing piece 10 by pressing and bending the central portion of the leaf spring 23a, the structure is simplified and the manufacturing is inexpensive. be able to. Although the two claws 23b are projected from the pressing piece 10 in the above embodiment, the number of the claws 23b may be one. The leaf spring in this case has a shape in which one side of the leaf spring 24 shown in FIG. 2 is cut off.

Further, in the mounting apparatus having the above construction, the tip end portion for mounting the rod assembly R is arranged in the closed space formed by the connecting flange 34, the out frame 31 and the pipe 33. Even if the water control valve 96 is opened, the water in the main pipe 1 only flows into the pipe 33 and does not flow out to the outside. Therefore, the blockage device A can be installed by the uninterrupted water work.

In particular, in the above embodiment, the tightening rod 5
0 and the outer peripheral portion of the connecting rod 60 are formed with hexagonal nut portions 53 and 62, respectively, so that they can be easily and quickly rotated by using the ratchet wrench, and the installation work time can be shortened. be able to. Further, in the above embodiment, the mounting device is mounted on the water control valve 96 via the thrust flange 80. Therefore, if the center of the flange 92 of the thrust flange 80 is aligned with the center of the branch port 2 in advance, the mounting device is mounted. Since it is not necessary to align the cores after mounting, the mounting work of the closing device A can be performed more quickly.

Next, FIGS. 15 and 16 are views showing another embodiment of the present invention. Closure device B shown in these figures
Is a modification of the retainer piece retaining mechanism, and the same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted. In the figure, reference numeral 100 is a pressing piece. This pressing piece 100 has a screw hole 101 at the upper end of the third hole 15c.
The difference from the pressing piece 10 of the above-mentioned embodiment is that only the point where the above is formed. A shaft 102 having the same sectional shape as that of the second hole 15b and the third hole 15c is slidably inserted in the axial direction.

At the lower end of the shaft 102, a pair of inclined surfaces 102 are formed by obliquely cutting out from the outer peripheral surface to the lower end surface.
a and 102a are formed back to back. On the other hand, the guide 16 of the presser piece 100 has a stopper 103
Is slidably inserted in the radial direction. Stopper 1
Reference numeral 03 denotes a rectangular plate shape, and its inner end portion is formed thicker than the gap of the guide 16. As a result, the tip of the stopper 103 can project from the guide 16 by a predetermined dimension. Further, an inclined surface 103a, which is formed by obliquely cutting out from the upper surface to the end surface, is formed at an inner corner of the stopper 103, and the inclined surface 103a is in sliding contact with the inclined surface 102a of the shaft 102. Reference numeral 104 in the drawing denotes a plug attached to the screw hole 101 for fixing the position of the shaft 102.

The blocking device B having the above-mentioned structure is installed in the branch port 2 of the main pipe 1.
In order to attach the stopper device 103 to the attachment device B, the closing device B is attached to the attachment device, and the stopper 103 is housed in the pressing piece 100 before inserting the closing device B into the branch port 2. In order to prevent the stopper 103 from arbitrarily protruding from the guide 16 due to its own weight or the like before the closing device B is attached to the branch port 2, the stopper 103 is made of resin so as to cross the opening of the guide 16 in the vertical direction. You can attach the tape. However, while this tape is easily cut at its central portion when the stopper 103 is projected, it must be firmly fixed so as not to be separated from the pressing piece 100. Then, when the blocking device B is inserted into the branch port 2, the expansion rod 70 of the mounting device is advanced and the shaft 102 is pushed in.
Then, the stopper 103 projects from the guide 16 of the pressing piece 100 as the inclined surface 102a of the shaft 102 moves,
It engages with the inner peripheral surface of the main pipe 1. Then, the nut 21 is tightened to deform the seal member 18 in the same manner as in the above embodiment,
The inner peripheral surface of the branch port 2 is closely attached. Then, after removing the mounting device from the closing device B, the screw 104 is inserted into the screw hole 101.
Install and complete.

Even in the closing device B having the above-described structure, the same effect as that of the above-described embodiment can be obtained, and the stopper 103 is moved by the cam mechanism constituted by this and the shaft 102. There is an advantage that the closing device B can be prevented from being pulled out by surely projecting. In this embodiment, the stopper 1
03 and the two inclined surfaces 103a and 102a of the shaft 102 constitute a cam mechanism.
It is also possible to form a dovetail groove having a trapezoidal cross section or a T-shaped cross section, and slidably couple each other. With this configuration, the shaft 102 can be moved in the pull-out direction and the stopper 103 can be mechanically pulled into the holding piece 100, so that the stopper 103 does not project arbitrarily. In such a configuration, the expansion rod 70 of the mounting device and the shaft 102 may be connected with a screw. Further, although the inclined surface 102a is formed on the shaft 102, a spherical surface may be formed. Further, in the above embodiment, the shaft 102 is slid in the axial direction to cam-drive the stopper 103, but the shaft may be rotated to cam-drive. 17 and 18 are diagrams showing an example of such a configuration.

As shown in FIGS. 17 and 18, the first piece 1 having a circular cross section is formed in the pressing piece 200 as in the above-described embodiment.
5a and the second hole 15b are formed. However, the third hole 201 is formed to have a circular cross section with an inner diameter smaller than that of the second hole 15b. A shaft 202 having the same cross-sectional shape as those of the second hole 15b and the third hole 201 is rotatably inserted.

On the lower end surface of the shaft 202, an oval cam 203 is attached as shown in FIG. 18 (B). Further, on the bottom surface of the first hole 15a of the pressing piece 200,
A plate 2 for preventing the shaft 202 from coming out downward in the drawing.
04 is attached. On the other hand, a stopper 205 is slidably inserted in the guide 16 of the pressing piece 200 in the radial direction. The stopper 205 has a rectangular plate shape,
Similar to the above embodiment, the inner end portion is formed thicker than the gap of the guide 16.

A plate portion 206 is formed on the upper end of the shaft 201 by flatly cutting out both sides thereof. The plate portion 206 is formed with a hole 206a penetrating in the plate thickness direction. The presser piece 2 is provided in the hole 206a.
A bolt 207 penetrating the small-diameter screw portion 14b of No. 00 is inserted, and a nut 208 is attached to an end portion of the bolt 207. In addition, the blocking device C of this embodiment is provided with the branch port 2
In the mounting device to be attached to the expansion rod 70, the expansion rod 70 is formed with a slit that fits with the plate portion 206.

The occluding device C having the above-described structure is installed in the branch port 2 of the main pipe 1.
In order to install the stopper 205, the closing device C is attached to the mounting device, the phase of the shaft 202 is set at a right angle to the state shown in the figure, and the stopper 205 is housed in the holding piece 200. Even in this case, a resin tape can be attached to the opening of the guide 16 in order to prevent the stopper 205 from jumping out of the guide 16 without permission. Next, in this state, the closing device C is inserted into the branch port 2, the expansion rod 70 of the mounting device is advanced, and the slit at the tip thereof is fitted into the plate portion 206 of the shaft 202. Then, when the extension rod 70 is rotated 90 °, the stopper 2
05 is pushed by the cam 203 to move forward, and the tip end thereof projects from the guide 16 of the pressing piece 200 and engages with the inner peripheral surface of the main pipe 1. Then, the nut 21 is tightened in the same manner as in the above-described embodiment to deform the seal member 18 and bring it into close contact with the inner peripheral surface of the branch port 2. Then, after removing the mounting device from the closing device C, the bolts 207 and the nuts 208 are held by the pressing piece 20.
Attach to 0 to complete.

As described above, also in the closing device C having the above structure, the same effect as that of the above-described embodiment can be obtained.
Further, as the cam mechanism for the shaft 200 and the stopper 205, various other mechanisms such as a link mechanism and a toggle joint mechanism can be used. Further, the present invention is not limited to the above water pipes, but can be applied to a crude oil pipeline, a gas pipe, and the like.

[0042]

As described above, according to the present invention, a ring-shaped seal member to be inserted into an opening provided on the surface of a fluid pipe and an inner peripheral surface and an inner side of the seal member are provided. A pressing piece that is inserted so as to come into contact with the facing end surface, a pressing ring that is provided on the pressing piece and that contacts the end surface that faces the outside of the seal member, and this pressing ring is moved relative to the pressing piece. By this, the sealing member is compressed by the pressing ring and the pressing piece to be deformed in the radial direction so that the outer peripheral surface of the sealing member is brought into close contact with the inner peripheral surface of the opening, and the end portion of the pressing piece moves in the radial direction. Freely provided,
A locking member that engages with the inner peripheral surface of the fluid pipe when the end portion is projected from the pressing piece, and is provided inside the pressing piece so as to be movable in the axial direction, and the end portion presses the locking member. With the operation member for pulling the end portion of the locking member into the holding piece by means of the above, there is no need for a holder as in the prior art, and therefore it can be applied to fluid pipes of various diameters. It can be manufactured at a low cost with a small number of parts.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a branch port closing device according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a closing device according to an embodiment.

FIG. 3A is a sectional view taken along line AA of FIG. 3B showing a state in which the blocking device of the embodiment is attached to the branch port, and FIG. 3B is a view taken along line BB of FIG. Is.

4 is a vertical cross-sectional view of the closure device shown in FIG.

FIG. 5 is a side view showing a pressing piece.

FIG. 6 is a side sectional view showing a pressing piece.

7 (A) is a sectional view taken along line VII-VII of FIG. 6 showing the presser piece, and FIG. 7 (B) is a view in the direction B of FIG. 7 (A).

FIG. 8A is a side sectional view showing the presser ring, and FIG. 8B is a view in the direction of arrow B in FIG. 8A.

9A is a side sectional view showing a seal member, and FIG. 9B is a view in the direction of arrow B in FIG. 9A.

10A is a plan view showing a stopper, and FIG. 10B is a side view.

11 is a plan sectional view showing a mounting device for mounting the blocking device of the present invention at a branch port, and shows a cross section taken along line XI-XI of FIG. 13. FIG.

12 is a side sectional view of the mounting device shown in FIG. 11, showing a sectional view taken along line XII-XII in FIG.

13 is a view of the mounting device shown in FIG. 12, taken along the line XIII-XIII.

14 is a view of the mounting device shown in FIG. 12, taken along the line XIV-XIV.

FIG. 15 is a cross-sectional view showing a closure device according to another embodiment of the present invention.

16 (A) is a vertical cross-sectional view of the closure device shown in FIG.
(B) is a B direction arrow view of (A).

FIG. 17 is a cross-sectional view showing a closure device according to still another embodiment of the present invention.

FIG. 18 (A) is a vertical cross-sectional view of the closure device shown in FIG.
(B) is a B direction arrow view of (A).

FIG. 19 is an axial cross-sectional view showing a conventional branch port closing device.

[Explanation of symbols]

1 ... Main pipe (fluid pipe), 2 ... Branch port, 10 ... Holding piece, 15
c ... Third hole (operation hole), 18 ... Sealing member, 20 ... Pressing ring, 21 ... Nut (moving means), 22 ... Shaft (operating member), 23 ... Stopper (locking member), 31 ... Out frame (Frame), 34 ... Connection flange (flange portion), 33 ... Pipe, 50 ... Tightening rod, 51 ... Socket wrench, 61 ... Female screw (female screw portion), 60 ... Connection rod, 70 ... Expansion rod (operation rod) ), 96 ... Water control valve (valve means), A ... Closure device, R ... Rod assembly.

Claims (14)

[Claims] 1. A ring-shaped seal member that is inserted into an opening provided on the surface of a fluid pipe, and is inserted through the seal member so as to come into contact with the inner peripheral surface and the end surface facing inward. The presser piece, the presser ring provided on the presser piece and in contact with the end surface of the seal member that faces the outside, and the presser ring is moved relative to the presser piece, whereby the seal member is pressed against the presser piece. A moving means for compressing with a ring and a pressing piece to deform it in the radial direction to bring the outer peripheral surface of the sealing member into close contact with the inner peripheral surface of the opening, and an end portion of the pressing piece movably provided in the radial direction. The
A locking member that engages with the inner peripheral surface of the fluid pipe when the end portion is projected from the pressing piece, and is provided inside the pressing piece so as to be movable in the axial direction thereof, and the end portion is the locking piece. An operation member for pulling the end of the locking member into the inside of the pressing piece by pressing the member. 2. The locking member is a leaf spring, and the operating member is moved by an external force to bend the leaf spring so that the one end of the spring member is placed inside the pressing piece. The pin is a pin that is retracted and is returned to the original position by the repulsive force of the leaf spring when the force from the outside is removed to cause the one end to protrude into the fluid pipe. 1. The branch port closing device according to 1. 3. The locking member is a leaf spring whose overall length in the unloaded state exceeds the width of the opening, and both ends of which are supported by a groove provided in the pressing piece so as to be movable in the radial direction. The closing device for a branch opening according to claim 2, wherein the operating member is in contact with a substantially central portion of the spring member. 4. A ring-shaped seal member that is inserted into an opening provided on the surface of the fluid pipe, and is inserted into the seal member so as to come into contact with the inner peripheral surface and the end surface facing inward. The presser piece, the presser ring provided on the presser piece and in contact with the end surface of the seal member that faces the outside, and the presser ring is moved relative to the presser piece, whereby the seal member is pressed against the presser piece. A moving means for compressing with a ring and a pressing piece to deform it in the radial direction to bring the outer peripheral surface of the seal member into close contact with the inner peripheral surface of the opening, and the pressing piece movably provided in the radial direction. And a locking member that engages with the inner peripheral surface of the fluid pipe when the portion is projected from the pressing piece, and is provided inside the pressing piece so as to be movable in the axial direction thereof, and an end portion of the locking member. Pressing the other end And an operating member for moving the locking member outward in the radial direction to project the one end from the pressing piece. 5. An inclined surface that is inclined with respect to the moving direction of the operation member is formed at the other end portion of the locking member, and the end portion of the operation member is brought into contact with the inclined surface. The branching port closing device according to claim 4, which is characterized in that. 6. An inclined surface parallel to the inclined surface of the locking member is formed at an end portion of the operation member, and both inclined surfaces are engaged with each other by a dovetail groove parallel to the inclined surface. The branch port closing device according to claim 5, wherein the inclined surfaces are connected so as to be relatively slidable. 7. The branch port closing device according to claim 5, wherein an end portion of the operation member is formed into a substantially spherical surface. 8. A ring-shaped seal member to be inserted into an opening provided on the surface of a fluid pipe, and the seal member inserted so as to come into contact with the inner peripheral surface and the end surface facing inward. The presser piece, the presser ring provided on the presser piece and in contact with the end surface of the seal member that faces the outside, and the presser ring is moved relative to the presser piece, whereby the seal member is pressed against the presser piece. A moving means for compressing with a ring and a pressing piece to deform it in the radial direction to bring the outer peripheral surface of the seal member into close contact with the inner peripheral surface of the opening, and the pressing piece movably provided in the radial direction. A locking member that engages with the inner peripheral surface of the fluid pipe when the portion is projected from the pressing piece, and an end portion that is rotatably provided inside the pressing piece about its axis and is rotated. The cam installed on the And an operating member configured to move the locking member outward in the radial direction by pressing the other end of the locking member to project one end of the locking member from the pressing piece. A device for closing the branch opening. 9. The branching port closing device according to claim 8, wherein the cam has an oval shape, and an outer peripheral surface of the cam is in contact with an end surface of the locking member. 10. The end portion of the locking member is movable in the axial direction of the fluid pipe.
9. The branch port closing device according to any one of 1 to 9. 11. The branch port closing device according to claim 1, wherein the seal member has a ring shape in a plan view and an arc shape in a side view. 12. The pressing piece has a disk-shaped piece body and a male screw portion provided coaxially with the piece body, and the moving means is a nut screwed to the male screw portion. The pressing ring is slidably fitted in the outer peripheral portion of the piece main body in the axial direction and is prevented from rotating relative to the piece main body, and the operating member is provided on the pressing piece coaxially therewith. The branch port closing device according to any one of claims 1 to 11, wherein the shaft is a shaft inserted in a hole. 13. A mounting device for a closing device, comprising a closing device for closing the opening provided on a surface of a fluid pipe, the closing device including a tightening rod, a connecting rod and an operating rod in order from the outside. Is provided coaxially with the rod assembly so as to be movable in its axial direction,
A socket wrench is provided at the tip of the tightening rod, the connecting rod is provided so as to be slidable and rotatable relative to the tightening rod, and the rear end thereof is the rear end of the tightening rod. From the rear end of the connecting rod, and the operating rod is slidable and rotatable relative to the connecting rod. In addition to projecting, the tip has a shape that can be inserted into an operation hole accommodating a shaft for driving the locking member of the closing device, and further, the tightening rod is slid on the frame in a liquid-tight state. An out frame that is movably and rotatably supported, and a flange portion that is connected to valve means provided in the opening,
A mounting device for a closing device, comprising: a pipe that is provided between the flange portion and the out frame and that liquid-tightly shields the periphery of the tip end portion of the rod assembly from the outside. 14. A further outer frame is connected to the out frame while being spaced apart from each other via a column, and a center frame located in the middle of the out frame is axially slidably supported by the column. Then, by supporting the rear end portion of the connecting rod in the center frame so as to be slidable and rotatably in the axial direction thereof, and screwing a feed screw rotatably attached to the pair of out frames. The closing device according to claim 13, wherein the closing device is configured to be movable in the axial direction, and further provided with an engaging portion that engages with a rotating tool on the outer periphery of the tightening rod, the connecting rod, and the operating rod. Mounting device.