JPS6212492Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pipe wall perforation device used when branching a branch pipe to an existing water main pipe or the like.

Conventionally, when connecting a branch pipe to a water main, the water flow to the main pipe was stopped and the branch pipe connection work was carried out. The present invention attempts to provide a tool that allows branch pipes to be connected without stopping water flow in the water main. Furthermore, the present invention is characterized in that the motor of a commercially available electric hand drill can be attached and detached and used for power.

An embodiment of the present invention will be described below in detail with reference to the drawings.
1 is the main body, and bearings 2, 3, 4 are fixed inside this body.
A long sleeve 5 is pivotally attached to the sleeve 5 so as to be rotatable only. Reference numeral 6 denotes a spindle with only the proximal end open, and the right-end overhanging cylindrical portion 6a is spline-fitted into the long sleeve 5.The inside of the overhanging cylindrical portion 6a becomes an expanded inner surface 13, followed by a small diameter The elongated inner surface 13b of is invading. Further, the spindle 6 has a chucking hole 6b at its tip for attaching a drill handle, and the spindle outer peripheral surface 6c protrudes to the left from the drill-side lid 1b of the main body 1 so as to be able to slide and rotate freely in the axial direction in a watertight manner. . 9 is sleeve 5
This is an annular bearing provided inside the left end of the annular bearing, into which the spindle outer circumferential surface 6c is fitted so as to be slidable and rotatable in the axial direction. 10 is an overhanging cylindrical portion 6 of the spindle 6
a A female screw loosely fitted to the inner expanded inner surface 13, which connects the expanded inner surface 1 through the thrust bearing 11.
It is in contact with the annular step 13a at the back 3. Reference numeral 12 denotes a stopper that prevents the female screw 10 from slipping out to the right, and is fixed to the expanded inner surface 13. 15 is a feed screw, and bearings 16, 16a are attached to the right lid 1a of the main body 1.
The bearings 16, 16a are
It is immovable in the axial direction with the collar 15a sandwiching the flange 15a and the boss portion of the handle 14, and is screwed into the female threaded portion 10 and inserted into the elongated inner surface 13b of the sleeve. 17 is a guide bar fixing piece that is slidably fitted into the elongated inner surface 13b, and 18 is a guide bar fixing piece that is slidably fitted into the elongated inner surface 13b;
A plurality of guide bar fixing plates fixed to the inside of the guide bar a are slidably inserted into holes 10a bored in the female screw 10 in the gap 20a between the elongated inner surface 13b and the feed screw 14. The leading end and the base end of the guide bar 20 are fixed to holes corresponding to the holes 10a of the guide bar fixing piece 17 and the guide bar fixing plate 18, respectively. 22a is gear box 1 on the main body side
This is a bevel gear fixed in c with the sleeve 5 as an axis. 22b is gearbox 1c
Bearings 23, 2 within the protruding cylindrical portion 1c' extending laterally from
A bevel gear is fixed to the inner end of a shaft 22 pivotally connected to the shaft 22, and meshes with the bevel gear 22a. A worm wheel 21 is fixed to the shaft 22 and meshes with the worm 25. 26 and 27 are bearings that hold the worm 25. Reference numeral 29 denotes a tapered hole provided at the shaft end of the worm shaft 30 to fit into the main shaft end of the electric hand drill, so that the main shaft end of the electric hand drill with the chuck removed can be attached to the fitting hole 29 in a manner that can be freely connected and detached. ing. In the diagram, 3
3 and 34 are cover plates, and 35 is a female screw portion connected to a sluice valve, which will be described later, provided at the tip of the drill side cover body 1b.

The above device is used as follows. First, as shown in FIG. 3, the portion of the water main pipe 36 to be drilled is excavated and the upper half 38a and lower half 38b of the half ring of the sluice valve 37 mounting flange are joined around the main pipe. A rubber sheet 43 is interposed between the upper half portion 38a and the water main pipe to form a seal. A sluice valve 37 is attached to the upper flange of the upper half 38a. A threaded flange is attached to the upper part of the sluice valve 37 and an adapter 39 is screwed thereto, into which a female threaded portion 35 at the tip of a drilling device equipped with a drill 42 is screwed. In this manner, the main shaft 41 of the electric hand drill motor 40 is then connected to the fitting hole 29 of the drilling device. Then, when the motor 40 is turned on, the rotation of the driving shaft 30 is caused by the worm 2.
5. Worm wheel 21, bevel gear 22
The signal is transmitted to the sleeve 5 through a gear train consisting of a and 22b, and the sleeve 5 rotates. The rotation of the sleeve 5 is transmitted to the spindle 6 via the spline fitting 7, and the drill 42 rotates. When drilling, the valve plate 37a of the sluice valve 37 is moved backward, so when the handle 14 is rotated, the drill 42 descends and hits the wall of the water pipe 36 to begin drilling.
This lowering is caused by the feed screw 15 being rotated by the handle 14 to propel the female screw 10 through the thrust bearing 11 to the annular stage 1 of the rotating spindle 6.
This is done by pressing 3a. At this time, the female screw 10 is not directly connected to the spindle 6, but the fixed piece 1
It is propelled while sliding in the axial direction by a guide bar 20 connected to 7 and a fixed plate 18. In this case, as the handle 14 rotates, the guide bar 20 is slightly bent at the female screw 10, but this bending prevents excessive force from being applied to the drilling section. Cutting is done smoothly. When the drilling into the tube wall is completed, the handle 14 is rotated in a direction opposite to the direction of propulsion and the drill is pulled up. In this case, the sluice valve is open but is covered by the perforation device itself, so no water flows out. When the tip of the drill 42 is above the valve plate 37a in this way, the sluice valve 37 is closed and the main shaft 41 of the electric hand drill motor 40 is inserted into the fitting hole 29 of the drilling device.
Then, the male threaded pipe 39 on the valve side and the female threaded part 35 of the punching device are unscrewed, and a water branch pipe for domestic use or the like is connected to the male threaded part 39. After that, if the sluice valve is opened again, water will flow to the branch pipe.

The present invention is as described above, and there is no need to stop the water flow in the main pipe when installing a branch pipe, and the driving shaft can be freely connected and detached from the main shaft of an electric hand drill motor to the main body of a pipe wall drilling device such as a water pipe. The long sleeve is rotated via a gear train, and the spindle of a drill fitted with a spline to the sleeve is rotated. By applying only the feed to the spindle of the drill, one person can easily drill holes without having to operate the drill with both hands to rotate and propel the drill, or with two people, as in conventional devices. Because it has a built-in sleeve, spindle, and feed screw, water and dirt do not get into the sliding contact area, so the rotating and sliding movement of these parts always occurs smoothly.
There is no wear due to dirt and sand, and the spindle is propelled by the feed screw through a female thread and a deflectable bar inserted through it.
Cutting with the drill is always stable and does not require skilled hands to rotate the handle.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line A--A, and FIG. 3 is a reduced front view for explaining the drilling operation using the same device. In the figure, 1...Main body, 1a...Handle side lid body, 1b
...Drill side cover body, 1c...Gear box, 1
c'...Protruding cylinder of gearbox, 1d...Worm support part, 5...Long sleeve, 6...Spindle, 6a...Extended cylindrical part, 6c...Spindle outer peripheral surface, 7...Spline fitting, 10... Annular female screw part, 10a... Wire hole, 11... Thrust bearing, 12... Stopper, 13... Expanded inner surface, 13a... Annular step, 13b... Long inner surface, 14... Handle, 15 ...Feed screw, 17...
Bar fixing piece, 18... Bar fixing plate, 20... Guide bar, 20a... Gap, 21... Worm wheel, 22... Shaft, 22a, 22b... Bevel gear, 25... Worm, 29... Electric hand Fitting hole at the end of the main shaft of the drill motor, 30...driving shaft.

Claims (1)

[Scope of utility model registration request] A spindle of a drill is spline-fitted into the inside of a long sleeve that is pivotally connected to the main body, and a female threaded part is fitted to the inner surface of the cylindrical spindle with its base end open so that it can rotate freely. At the same time as screwing the feed screw into the feed screw, a flexible bar is slidably inserted into a hole drilled in the female thread part parallel to the axis of the feed screw, and the tip of the bar can be rotated deep inside the spindle. At the same time, the proximal end of the bar is fixed to the main body side member around the feed screw, and a handle is provided on the outer end of the feed screw, and the main shaft of the electric hand drill motor is connected to and disconnected from the main body. A device for perforating the wall of a water pipe or the like, which is constructed by pivotally mounting a freely movable driving shaft and rotating the elongated sleeve by the driving shaft via a gear train.