JPH0749193Y2 - No blow operation jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an operating jig for operating a branch joint portion of an existing buried pipe without leaking from the ground.

[Prior Art] Conventionally, as a device relating to the above-mentioned operation jig, there has been disclosed in Japanese Utility Model Publication 63-943.
There is one shown in FIG. 3 disclosed in Japanese Patent Laid-Open No. 92.

This is an outer cylinder 1, a storage case 4 mounted on the upper side of the outer cylinder 1, a shutter opening / closing device 3 mounted between the outer cylinder 1 and the storage case 4, and a branch joint mounted on the lower end of the outer cylinder 1. 60
Packing holder 2 having an annular packing that contacts the head of the outer cylinder 1, a support rod 5 that horizontally extends from the outer peripheral surface of the outer cylinder 1 to support the outer cylinder 1, and a joint provided at the lower end inside the outer cylinder 1. It is a no-blow operation jig including a lifting shaft 6 having a head 8 for holding a component and a handle 7 at the upper end. After installing this operating jig on the branch joint 60,
The plug attached to 60 is removed by the head 8 at the lower end of the lifting shaft 6, the lifting shaft 6 is raised to the storage case 4 while gripping the removed plug, and the shutter opening / closing device 3 is closed. 4, the opening / closing lid 41 of 4 is opened to remove the plug and the like, the head 8 is replaced with, for example, a stopper for a shutoff valve, the shutoff valve stopper is gripped by the head 8, and the storage case 4 is closed. 3 is opened, the elevating shaft 6 is lowered, and, for example, a shutoff valve stopper is attached to the branch joint 60.

[Problems to be Solved by the Invention] In the above-mentioned conventional operation jig, there are a portion for inserting the lifting shaft 6 into the storage case, an opening / closing lid 41 of the storage case 4, a shutter opening / closing device 3, and a packing portion at the lower end of the outer cylinder 1. Although it is necessary to make the four parts airtight, there is a problem that the sealing structure of the opening / closing lid 41 and the shutter opening / closing device 3 becomes complicated.

Further, since the outer cylinder 1, the storage case 4, the shutter opening / closing device 3, the support rod 5 and the like are provided, the weight of the entire operation jig increases, and the handling operation for attaching to the branch joint portion of the underground buried portion is difficult. There was a problem.

Further, the outer cylinder 1 is made of a hard plastic pipe, and depending on the depth of the buried branch joint portion from the ground, the outer cylinder 1 must be added and the work at the optimum position cannot be performed. .

The present invention provides a no-blow operation jig that solves the above problems.

[Means for Solving the Problems] The gist of the present invention is to provide an airtight bag body having an opening at the lower end and a fastener capable of being sealed on the upper side surface, and to be able to rotate and slide airtightly from the upper end of the bag body. A fastening rod having an engaging portion which is inserted into the bag body and engages with a joint component at a lower end thereof, and a magnet which grips the joint component, and an opening which is attached to an opening portion of the bag body and which is attached to the outer periphery of an end portion of the joint. A holder that is airtightly fixed to the surface, an operating rod whose lower end is fixed to the outer surface of the bag opening, and a bag that is located below the tightening rod when the tightening rod is pulled up. It is a no-blow operation jig characterized by comprising a sandwiching tool for sealing.

[Operation] The bag opening is placed on the joint by the operating rod, the bag opening and the joint end are sealed by the holder, and the joint parts attached to the joint are removed by the tightening rod. While grasping the removed joint part with a magnet, pull up the tightening rod to the upper part of the bag body, attach the clamp to the lower part of the bag body to seal between the lower part and the upper part of the bag body, and open the fastener to open the joint part. To another fitting part, seal the fastener, then remove the clamp, lower the tightening rod to attach another fitting part to the fitting, and seal the bag opening and the joint end with the holder. , And the bag is pulled up by the operating rod, and thus the no-blow operation jig is used, so that the joint parts can be exchanged without leaking.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. First
The figure is a vertical cross-sectional view showing a state in which the no-blow operation jig 10 is attached to the branch joint 60. The no-blow operation jig 10 has an elongated bag 11 made of a transparent vinyl chloride resin tube in the longitudinal direction, and the inner peripheral surface of the lowermost end of the bag 11 has the outer peripheral surface of the head of the branch joint 60. Ring-shaped rubber ring to seal 12
Is detachably attached to form an opening. The rubber ring 12 and the bag body 11 are fixed by fitting the hard ring 21 on the inner peripheral surface of the upper portion of the rubber ring 12 and the metal band from the outer peripheral surface of the bag body 11.
It is tightened and fixed by 13.

A holder 14 for sealingly fixing the rubber ring 12 to the outer peripheral surface of the head portion of the branch joint 60 is provided on the lower peripheral surface of the rubber ring 12. This holder 14 has a screw provided on the holder 14 which is rotated by a fastener (in this embodiment, an air-driven ratchet wrench manufactured by Fuji Co., Ltd.) to reduce the outer diameter of the holder 14. With rubber ring 12 branch joint
After mounting on the 60, the ratchet wrench 22 is operated from the ground to rotate the screw of the holder 14, and the rubber ring 12 is closely fixed to the branch joint 60 to fix the bag body 11 to the branch joint 60. .

Reference numeral 15 is a pair of operation rods for operating the bag body 11 from the ground to attach or detach the rubber ring 12 to the branch joint 60, and the operation rod 15 is formed by a thin-walled cylindrical tube,
This lower end is fixed integrally with the metal band 13.

A fastening rod 16 is inserted into the bag body 11 so as to rotate and slide in a sealed state with the upper end of the bag body 11. A sealing ring 17 having an O-ring is fixed to the upper end of the bag body 11. The sealing ring 17 allows the tightening rod 16 to be hermetically sealed even if the tightening rod 16 rotates or slides. The lower end of the tightening rod 16 is a branch joint.
It has a base 18 that rotates with 60 joint parts.
A magnet 19 for adsorbing the joint component is fixed to the outside of 18. For this reason, the joint parts are held in
Operated within 11.

A fastener 20 is provided on the outer surface of the upper portion of the bag body 11. The fastener 20 can be hermetically sealed in a closed state,
This fastener with the tightening rod 16 pulled up to the top of the bag
By opening 20, the joint part can be attached to the lower end cap 18 of the tightening rod 16 and the joint part on the cap 18 can be taken out.

FIG. 2 shows a clamp 30 that clamps the outer surface of the bag 11 and closes the bag 11 from the lower part to the upper part so that gas from the branch joint 60 does not flow. The clamping device 30 may be anything as long as it clamps the outer surface of the bag body 11 to close it, but in the present embodiment, when the two semi-circular plates 31 and 32 are clamped on the outer surface of the bag body, the bag body is closed. A large contact area with the body 11 is provided, and two semi-circular plates 31 and 32 are sandwiched between the bolt nuts 33 and 34 at both ends to seal the bag body 11 interposed therebetween. .

The operation method of the no-blow operation jig explained above is
The rubber ring 12 is placed on the joint 60 by means of 15, and the bag body 11 is jointed by means of the holder 14 by operating the ratchet wrench 22.
Airtightly fix to the joint 60, and remove the plug attached to the joint 60 by rotating the tightening rod 16 and pulling the tightening rod 16 to the upper part of the bag 11 while grasping the removed plug with a magnet. Attach the garment 30 to the lower part of the bag body 11 to seal the space between the lower part and the upper part of the bag body 11, open the fastener 20 and replace the plug with, for example, a stopper for a shutoff valve, and close the fastener 20 before sandwiching the tool. Remove 30 and lower the tightening rod 16 to attach the shut-off valve stopper to the joint 60, operate the ratchet wrench 22 to release the fixing between the bag body and the joint end by the retainer 14, and use the operating rod 15 Pull up the bag 11. By using the no-blow operation jig 10 in this way, the joint parts can be replaced without leaking.

Therefore, since it is not necessary for an operator to enter the underground of the buried pipe joint to work, it is only necessary to excavate a small hole, and it is not necessary to temporarily stop the main pipe for the replacement work of the joint parts. Joint parts can be easily replaced from the ground in a no-blow condition.

At that time, the fastener 20 is the opening / closing lid of the conventional storage case 4.
Compared to 41, the structure can be easily sealed, and the clasp 30
Also, compared to the conventional open / close shutter 3, the structure can be simply sealed. Further, since the bag body 11 is flexible and easily expands and contracts, it is possible to follow the depth of the buried pipe and work at an optimum position. Further, the entire operation jig can be made lightweight.

[Effects of the Invention] As described above, the no-blowing operation jig of the present invention has a simpler structure, is lighter in weight than the conventional one, and can easily replace the joint parts of the existing branch joint in the no-blowing state.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a state in which a no-blow operation jig according to an embodiment of the present invention is attached to a branch joint, FIG. 2 is a perspective view showing a clamp according to an embodiment of the present invention, and FIG. 3 is a conventional no-blow. It is a longitudinal section showing an operation jig. 10 …… No blow operation jig, 11 …… Bag 12 …… Rubber ring, 13 …… Metal band, 14 …… Holder 15 …… Operation rod, 16 …… Tightening rod, 17 …… Seal ring 18… … Mouthpiece, 19 …… Magnet, 20 …… Zipper 21 …… Hard ring, 22 …… Ratchet wrench 30 …… Clamping tool, 31,32 …… Semi-circular plate 33,34 …… Bolt nut, 60 …… Branch fitting

Claims (1)

[Scope of utility model registration request] 1. An airtight bag body having an opening at the lower end and a fastener capable of being closed on the upper side surface, and a fitting part inserted into the bag body so as to be able to rotate and slide airtightly from the upper end of the bag body at the lower end. A fastening rod having an engaging portion that engages with and a magnet that grips the joint component, a holder that is attached to the opening of the bag body and that hermetically fixes the opening to the outer peripheral surface of the end of the joint, An operating rod having a lower end fixed to the outer surface of the bag opening, and a clamp that clamps and seals the bag body below the tightening rod when the tightening rod is pulled up. Characteristic no-blow operation jig.