JPS643913Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a plug fitting machine, and more specifically, for example, when an outlet pipe is connected to a synthetic resin main pipe through an attachment hole, the outlet hole is airtightly sealed with a plug. Relating to a plug installation machine for occluding.

PRIOR ART When repairing a main pipe buried underground for transporting a fluid such as city gas, such a plug installation machine is used to install plugs on both sides of the repaired area in order to continue transporting the fluid. This is necessary when installing an outlet pipe on the main pipe to form a side passage, performing repair work, and then removing the outlet pipe. When removing the extraction pipe,
The outlet hole must be closed to prevent fluid from leaking to the outside.

In the prior art shown in FIG.
is connected, and in order to remove this take-out pipe 102, it is squeezed by a pair of rollers 103 to close the take-out pipe 102, and in this state, the take-out pipe 10 is removed.
At the end 104 of the cap 1 shown in FIG.
05 airtightly. After that, the roller 103 is removed.

Problems to be Solved by the Invention In such prior art, while the take-out pipe 102 is being pinched by the rollers 103, the take-out pipe 102 is
For example, the spacing between the saddle 101 and the roller 103 and the spacing between the roller 103 and the cap 105 are adjusted so that the saddle 101 and the cap 105 are airtightly connected. It is required to be approximately five times or more the diameter of the pipe 102, and therefore the length l1 of the extraction pipe 102 must be increased. Such an extraction pipe 10
Since the length l1 of 2 is long, there is a problem in that it is easily damaged by other construction work. This length l1
is, for example, about 45 cm. The state in which the cap 105 is attached to the extraction pipe 102 and closed is shown in FIG. In this way, the length of the extraction pipe 102
Since l1 is relatively long, as mentioned above, the extraction pipe 102 is easily damaged by other construction work, which poses a problem in maintenance and management.

The purpose of this invention is to use a plug that can be used to block a branch route to an outlet pipe, for example, without having the outlet pipe branched and attached to the main pipe protrude long from the main pipe. It is to provide a mounting machine.

Means for Solving the Problems The present invention consists of a clamp member that holds the free end of the take-out pipe whose base end communicates with the take-out hole in a manner that allows it to be opened and closed; a base body that is freely displaceable along the axis of the take-out pipe within the take-out pipe, a drive rod that is rotatable about the axis and passes through the base in an airtight manner, and one end of the drive rod that is connected to the clamp member by a screw. a plug that can be fitted and attached to the ejection hole; a drive means for moving the drive rod in parallel along its axis; and means for connecting the clamp member and the base body in a direction in which they approach each other. This plug installation machine is characterized by:

In a preferred embodiment, a socket joint is fixed to the free end of the take-out pipe, the clamp member is disposed on the proximal side of the socket joint of the take-out pipe, and the base body is fitted into the socket joint. shall be.

Function When using the plug installation machine of the present invention to close the route of the outlet pipe connected to the main pipe, etc., first, the intermediate position of the outlet pipe is pinched and closed using a roller or the like. The plug is screwed to the drive rod. Therefore, the fitting portion of the base body is airtightly attached to the free end of the extraction pipe. After that, remove the rollers pinching the take-out pipe, and insert the plug into the take-out pipe.
The connecting means connects the clamp member and the base body in a direction in which they approach each other, thereby making it possible to reliably fit the base body into the free end of the extraction tube. The drive rod is pushed toward the ejection hole by the driving means, and the plug is fitted into the ejection hole. In this way, the extraction hole is hermetically closed by the plug. Thereafter, the drive rod is rotated so that the plug threadedly connected to the drive rod is disengaged from the drive rod.

After fitting the plug into the ejection hole and removing the drive rod from the plug, the fitting portion of the base body is removed from the free end of the ejection pipe, and the clamp member is removed from the ejection pipe.
Next, cut off near the proximal end of the extraction tube. Thereafter, a clamp is attached to the free end of the extraction pipe to seal it airtight.
In this way, it becomes possible to cut the extraction tube extremely short from the source tube. Therefore, there is no risk that the extraction pipe will be damaged during subsequent construction work. Note that the cap may not be used.

Embodiment An embodiment of the present invention will be described with reference to FIG. In order to repair the main pipe 1 made of synthetic resin, such as polyethylene, buried underground, a vertical hole 150 is excavated and rollers 151, 152 are installed.
Repair is carried out at the cut-off repair location 153 using the following. The main pipe 1 is used to transport fluid such as city gas. During the construction of this repair area 153, in order to maintain the fluid supply,
A take-out pipe 3 is connected to one end of the main pipe 1 via a saddle 2, and a short pipe 54 is connected to this take-out pipe 3 via a socket joint 5. A take-out pipe 56 is also connected to the other side of the main pipe 1 via a saddle 55, and a short pipe 58 is connected via a socket joint 57.
are concatenated. Short pipes 54, 58 are joints 59, 60
They are interconnected by a connecting pipe 61 via the connecting pipe 61. The saddles 2, 55, the outlet pipes 3, 56, the socket joints 5, 57, and the short pipes 54, 58 are made of synthetic resin. After the repair of repair point 153 is completed,
To remove the extraction pipes 3, 56 without leaking the fluid inside the main pipe 1 to the outside.

To remove the take-out pipe 3, as shown in FIG. 2, a tool having rollers 62 and 63 is used to pinch the middle of the take-out pipe 3 in the length direction, and the take-out pipe 3 is airtightly closed. do. The other extraction pipe 56 is similarly closed. The short tube 54 is then cut at the position indicated by reference numeral 64 in FIG. This cutting point is also shown for reference in FIG. Therefore, another socket joint 65 is heat-sealed to the remaining short pipe 54 connected to the socket joint 5 to connect it airtightly, and a plug attaching machine 66 is airtightly attached to this socket joint 65.

FIG. 3 shows the plug installation machine 66 connected to the socket joint 6.
5 is a sectional view showing a state in which the outlet hole 11 formed in the main tube 1 is closed by a plug 67 when the plug 67 is attached to the main tube 1. FIG. This plug fitting machine 66 includes a clamp member 4 that holds the free end of the outlet pipe 3 openably and closably on the side of the main pipe 1 from the socket joint 5, a base body 6 that is hermetically fitted into the socket joint 65, and the base body 6. A drive rod 7 that has the same axis as the axis of the extraction pipe 3 and is displaceably and airtightly fitted therein, a plug 67 that is removably fixed to one end of the drive rod 7 near the main pipe 1, and a drive rod. 7
It includes a driving means 9 provided at the other end, and a tightening means 10 that tightens and connects the clamp member 4 and the base body 6 in a direction in which they approach each other.

FIG. 4 is a plan view of the clamp member 4. The clamp member 4 includes a pair of half pieces 12 and 13 that contact the outer periphery of the extraction tube 3 approximately half a circumference at a time. One end portions of the half pieces 12 and 13 are mutually pivotally supported by a pin 14 parallel to the axis of the extraction tube 3. Half piece 12
A locking protrusion 15 is protruded from the other end, and a support protrusion 16 is protruded from the other end of the half piece 13. A lever 18 is pivotally supported on the support projection 16 by a pin 17 parallel to the pin 14.
A connecting ring 19 is provided in the middle of the ring 8. Connecting ring 1
When the lever 18 is rotated to the position shown in FIG. 4 with the lever 18 hooked on the locking protrusion 15,
The support protrusions 16 are tightened in the direction in which the half pieces 12, 13 approach each other, that is, in the direction in which the other ends of the half pieces 12, 13 approach each other.
The extraction tube 3 is fixedly held by the handles. When the lever 18 is rotated around the pin 17 as shown by the imaginary line, the connecting ring 19 is released from the locking protrusion 15.
The two halves 12, 13 can thereby be released around the pin 14.

FIG. 5 is an enlarged sectional view of the vicinity of the base 6, and
The figure is a sectional view taken along the cutting plane line - in FIG. 3, and FIG. 7 is a right side view of FIG. 3. A fitting portion 20 extending downward is provided in a protruding manner at the lower portion of the base body 6 . This fitting part 20 has a large diameter part 21 in order from the top.
and a small diameter portion 22, the diameter of the small diameter portion 22 having a value that allows it to fit into the socket joint 65 in an airtight manner. The large diameter portion 21 is used when fitting into a socket joint having a larger diameter than the socket joint 65. O-rings 23 and 24 are provided on the outer peripheries of the large-diameter portion 21 and the small-diameter portion 22, respectively.

The base body 6 has a through hole 25 that is concentric with the axis of the extraction tube 3.
is formed. This through hole 25 has an O ring 28
is provided. The drive rod 7 is inserted into the through hole 25 .

A driving means 9 including a handle 32 is attached to the end of the driving rod 7 on the opposite side from the main tube 1 by a bolt 34. By reciprocating the handle 32 around the axis of the drive rod 7, the drive rod 7 is rotated in one direction around the axis.

FIG. 8 is a sectional view of the plug 67 and its vicinity, and FIG. 9 is an exploded perspective view thereof. A plug 67 is detachably fixed to the end of the drive rod 7 closer to the main pipe 1. A main body 39 is attached to the drive rod 7, and a plug 67 is screwed onto the main body 39.

An engaging portion 43 having an inverted T-shaped cross section including the axis is formed at one end of the drive rod 7 . From the end surface of the main body 39 near the drive rod 7 to the middle of the through hole 44,
An inverted T-shaped fitting groove 45 having a cross section perpendicular to the radial direction of the main body 39 is formed. This fitting groove 45 is the through hole 4
4 and extends outward along the radial direction and is open to the side of the main body 39. The engaging portion 43 of the drive rod 7 is fitted into this fitting groove 45 as shown in FIG. A recess 46 is formed on the side of the engaging portion 43, and a sphere 47 is fitted into the recess 46.
This sphere 47 is urged toward the recess 46 by a spring 48, thereby preventing relative rotation between the drive rod 7 and the main body 39. Spring 48 is received by support member 49.

Since the engaging portion 43 of the drive rod 7 is engaged with the fitting groove 45, they do not separate from each other in the axial direction, and it is extremely easy for the engaging portion 43 to fit into the fitting groove 45. Therefore, the plug 67 and the hole saw 40 described below can be easily attached to one end of the drive rod 7. When removing the main body 39 from one end of the drive rod 7, the engaging portion 43 of the drive rod 7 may be taken out from the fitting groove 45 along the radial direction of the main body 39. An external thread 69 formed on the main body 39 is engaged with an internal thread 73 of a nut 72 embedded in the plug 67. The plug 67 is
It is made of rubber, has elasticity, and can be fitted into the extraction hole 11 to keep the extraction hole 11 airtight. The outer thread 69, the inner thread 73 and the plug 67 have the same axis as the drive rod 7.

The tightening means 10 includes a pair of handles 50 projecting radially outward on one diameter of the clamp member 4.
, a pair of handles 51 protruding on both sides in the radial direction on one diameter line of the base body 6, and both handles 50, 51.
It includes a connecting member 52 that connects the two, and a screw member 53 provided on the connecting member 52. Connecting member 52
is an engagement hole 154 extending along the axis of the extraction pipe 3
The handle 50 is engaged with one end of the engagement hole 154 (lower end in FIG. 7), and the engagement hole 15
4 (upper end in FIG. 7) has a handle 51.
is engaged. The tip of the screw member 53 provided at the end of the connecting member 52 can come into contact with the handle 51. Therefore, by screwing the screw member 53 into contact with the handle 51 and tightening it, The handles 50, 51 are tightened in a direction toward each other. Thereby, the fitting portion 20 of the base body 6 is reliably fitted into the receptacle of the socket joint 65.

When attaching the plug attachment device 66, the clamp member 4 is attached near the free end of the outlet pipe 3, and the base body 6 is inserted into the socket of the socket joint 65. At this time, a plug 67 is attached to the tip of the drive rod 7 in advance. After the plug fitting machine 66 is hermetically fitted into the socket joint 65 in this way, the rollers 62, 6
3 from the take-out pipe 3 to release the clamping pressure by the rollers 62 and 63, and then remove the take-out pipe 3 by the clamp member 4.
The cross section perpendicular to the axis of the plug 67 is corrected so that it becomes almost a perfect circle, so that the plug 67 can be inserted into the extraction pipe 3. Next, the clamp member 4 and the base body 6 are tightened in a direction in which the clamp member 4 and the base body 6 approach each other by the tightening means 10, so that the fitting portion 20 of the base body 6 is securely fitted into the receptacle of the socket joint 65.

Thereafter, by turning the ratchet handle 32 while pushing it downward in FIG. 3, the drive rod 7 is pushed toward the main pipe 1. This causes the plug 67 to fit into the extraction hole 11. In this way, the extraction hole 11 is hermetically closed. In this state, the handle 32 is rotated so that the outer thread 69 and the inner thread 73 are unscrewed.

Insert the plug 67 into the removal hole 11 and remove the plug 67.
After removing the drive rod 7 from the socket, the plug fitting machine 66 is removed from the socket joint 65. Next, the extraction tube 3 is cut near the proximal end as indicated by reference numeral 74 in FIG. Thereafter, as shown in FIG. 11, a synthetic resin cap 75 is heat-sealed to the free end of the take-out pipe 3 to seal it airtight. In this way, it becomes possible to cut the extraction pipe 3 extremely short, and there is no fear that the extraction pipe 3 will be damaged during subsequent excavation work or the like. The take-out pipe may be hermetically closed by heat fusion without using the cap 75.

The plug fitting machine 66 also connects the outlet hole 11 to the main pipe 1.
It can be used to drill holes. Referring to FIG. 10, the main body 3 attached to the tip of the drive rod 7
Screw the hole saw 40 onto the external screw 69 of 9. The saddle 2 is heat-sealed to the main pipe 1, then the take-out pipe 3 and the socket joint 5 are heat-sealed, and then the base body 6 is fitted into the socket joint 5, and the handle 32 is pressed and turned to open the hole saw. 40 can be inserted into the main pipe 1 and the extraction hole 11 can be bored therein.

The present invention can be widely implemented not only in the repair work of the main pipe 1 buried underground, but also in other technical fields where an extraction pipe is provided. For example, the present invention can be implemented even when a take-out pipe is provided on the side wall of a tank body or the like for storing fluid instead of the main pipe.

Effects of the Invention As described above, according to the present invention, a plug can be inserted into the outlet hole with which the outlet pipe communicates to close it. This makes it possible to shorten the extraction tube. Therefore, the extraction pipe will not be damaged due to construction work, etc., and maintenance management will be easy.

[Brief description of the drawings]

Fig. 1 is a cross-sectional view of the vicinity of the repair point 153 of the main pipe 1 where the present invention is implemented, Fig. 2 is a cross-sectional view showing one process of an embodiment of the present invention, and Fig. 3 is a plug installation machine 6.
6 is a cross-sectional view of the clamp member 4, and FIG. 4 is a plan view of the clamp member 4.
FIG. 5 is an enlarged sectional view of the vicinity of the base 6 of the plug installation machine 66, FIG. 6 is a sectional view taken from the cutting plane line - of FIG. 3, FIG. 7 is a side view of the vicinity of the base 6, and FIG. 9 is an exploded perspective view of the vicinity of the plug 67, FIG. 10 is a sectional view showing the hole saw 40 attached to the main body 39, and FIG. 11 shows the extraction tube 3 near its base end. 12 is a side view showing the state in which the take-out pipe 102 in the prior art is clamped by rollers 103; FIG. 13 is a cross-sectional view showing the take-out pipe 102 in the prior art closed with a cap 105. FIG. 1...Motor pipe, 2,55...Saddle, 3,56...
...Takeout pipe, 4...Clamp member, 5, 57...Socket joint, 6...Base, 7...Drive rod, 9...
Drive means, 11... Takeout hole, 59, 60... Joint, 61... Connection pipe, 67... Plug, 75
...cap.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A clamp member that holds the free end of the take-out pipe whose base end communicates with the take-out hole in an openable and closable manner, and a clamp member that is removably and airtightly attached to the free end of the take-out pipe. a base body, a drive rod that is freely displaceable within the takeout pipe along the axis of the takeout pipe and rotatable about the axis and passes through the base body in an airtight manner; , a plug that can be fitted and attached to the extraction hole, a drive means for moving the drive rod in parallel along its axis, and a means for connecting the clamp member and the base body in a direction in which they approach each other. A plug installation machine featuring: (2) A socket joint is fixed to the free end of the take-out pipe, the clamp member is disposed on the proximal side of the socket joint of the take-out pipe, and the base body is fitted into the socket joint. A plug installation machine according to claim 1 of the utility model registration claim.