JPH0136576Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is designed to prevent metal pipes penetrating concrete structures such as building walls and floors from coming into contact with reinforcing bars and steel frames of the concrete structure, resulting in the formation of corrosion batteries. The present invention relates to a tool for drilling holes in concrete structures around penetrations of metal pipes when there is a risk of corrosion of the metal pipes.

[Prior art]

Conventionally, there have been no tools suitable for such drilling operations.

[Problem that the invention attempts to solve]

Therefore, conventional methods for removing concrete structures around metal pipes that have penetrated concrete structures include poking them with a chisel, or, if this is not possible, cutting the existing pipes penetrating the concrete structures. The method of removing pipes and re-installing new pipes is taken, which requires a lot of time and effort to disassemble and remove the pipes and install new pipes, and in the case of city gas pipes and water pipes, the supply is interrupted. There was a drawback that I had to do something about it.

The purpose of this invention is to easily and quickly perform drilling work in concrete structures around the penetration part of metal pipes without damaging the metal pipes and without requiring disassembly of the pipes, and in addition, The object of the present invention is to provide a tool that can perform drilling at a reasonable and appropriate speed.

[Means to solve the problem]

The features of the present invention include: a connecting part that can be clamped and fixed to a metal pipe penetrating a concrete structure and detachable; a half-split rotary cylindrical body equipped with a concrete cutter that can freely rotate around the metal pipe; and its rotation. The present invention is provided with a driving device for the cylindrical body and a manual movement operation section that reciprocates the concrete cutter together with the driving device in the longitudinal direction of the metal pipe, and its effects are as follows.

[Effect]

In other words, when drilling, first fix the connecting part to the metal pipe, and then attach the half-split rotating cylindrical body.
The concrete cutter is set in the connecting part with the concrete cutter facing the concrete structure surrounding the metal pipe and in conjunction with the drive device, and the concrete cutter is rotated around the metal pipe by the drive device. At the same time, it is moved to the concrete structure side while adjusting the speed appropriately using the manual moving operation unit, and the cutter is used to cut the concrete structure around the entire circumference of the metal pipe's penetration part, or remove the penetration part. The pipe is cut into a cylindrical shape that extends around the entire circumference to form a gap around the penetrating part of the metal pipe, thereby eliminating contact between the metal pipe and the reinforcing bars or steel frame.

[Effect of idea]

As a result, corrosion of metal pipes caused by contact with reinforcing bars and steel frames can be prevented, and the work to prevent corrosion can be carried out without disassembling the pipes, rather by making effective use of the pipes and damaging the metal pipes. It can be done easily and quickly by driving the concrete cutter, and furthermore, by moving the concrete cutter to the concrete structure side at an appropriate speed by manual operation, there is no problem such as breakage of the cutter. Overall, it has become possible to carry out repairs to prevent corrosion of piping very simply, efficiently, and in good condition.

〔Example〕

Next, an example will be shown with reference to FIGS. 1 to 4.

A fixed clamp 2 in the shape of a half tube that can be freely fixed to the metal pipe 1 while surrounding it, and a movable half tube shape that can be attached to the fixed clamp 2 in a slidable manner while surrounding it. A clamp 3, a half-split rotary cylindrical body 4 rotatably attachable to the movable clamp 3, a rotatable cylindrical body 4 rotatable around the metal pipe 1.
A concrete cutter 5 equipped with the concrete cutter 5, a drive device A for the rotary cylindrical body 4, and a manual movement operation section B for reciprocating the concrete cutter 5 and the drive device A in the longitudinal direction of the metal pipe 1,
A tool is configured to repair piping in which there is a metal pipe 1 penetrating a concrete structure to prevent corrosion.

The fixing clamp 2 is held in a cylindrical shape by a connecting bolt 6, and fixed to the metal pipe 1 by a fixing bolt 7 so as not to rotate or slide.

The movable clamp 3 is held in a cylindrical shape by a connecting bolt 8, and is configured such that it cannot rotate relative to the fixed clamp 2 due to the engagement between the pinion gear 9 of the movable clamp 3 and the rack 10 of the fixed clamp 2.

The manual movement operation section B consists of the pinion gear 9, a rack 10, and a handle 11 for the pinion gear 9.

The rotating cylindrical body 4 has a half-shaped ring gear 13 connected with bolts 12, and is held in a cylindrical shape by bolts 14, and the ring gear 13 has a half-shaped bearing 1.
5 and a retainer 16 so as to be rotatably attached to the movable clamp 3.

The drive device A includes a bracket 18 detachably connected to the movable clamp 3 with a bolt 17.
An electric motor 19 and a reduction gear 20 are provided, and a pinion gear 21 attached to the reduction gear 20 is configured to mesh with the ring gear 13.

Next, the construction status using the above tool will be shown.

As shown in FIG. 5A, at the locations where the metal pipe 1 penetrates the concrete building wall 22 and floor 23, the ground is dug as necessary, and then the metal pipe 1 is placed near the outside of the building wall 22. , or floor 2
3, and fix the fixing clamp 2 to the metal pipe 1.

Next, as shown in FIG. 1, the movable clamp 3 is attached to the fixed clamp 2, the rotary cylindrical body 4 is attached to the movable clamp 3, and then the drive device A is attached.

Next, while the concrete cutter 5 is rotated by the drive device A, the concrete cutter 5 is moved to the building wall 22 or floor 23 side by the handle 11, and the concrete around the penetration part of the metal pipe 1 is cut into a tube by the cutter 5. Cut into shapes.

Next, rotate the handle 11 in the opposite direction and cutter 5.
The drive unit A, the rotary cylindrical body 4, the cut concrete, the movable clamp 3, and the fixed clamp 2 are removed from the metal pipe 1, as shown in FIG. 5B. , a gap 24 around the penetration part of the metal pipe 1
and an electrically insulating filler 25 as necessary.
Close the gap 24 with.

[Another example]

Instead of fixed clamp 2, use metal pipe 1 as a tool.
An appropriate configuration for clamping and fixing the connector can be used, and these are collectively referred to as the connecting part 2.

The rotating cylindrical body 4 and the drive device A are connected to the connecting part 2.
The configuration for slidably attaching can be changed as appropriate, and the configuration of the manual movement operation section B can also be changed as appropriate in accordance with the attachment configuration.

The drive device A can be freely changed in configuration, such as an electric type or a fluid pressure driven type, and the concrete cutter 5 can also be changed in shape, material, etc.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, with Figure 1 being a sectional view, Figure 2 being an exploded side view with some parts omitted, Figure 3 being a front view, and Figure 4 being a rear view. It is a diagram. FIG. 5 is an explanatory diagram of the construction state. DESCRIPTION OF SYMBOLS 1... Metal pipe, 2... Connection part, 4... Rotating cylindrical body, 5... Concrete cutter, A... Drive device, B... Human movement operation part.

Claims (1)

[Scope of utility model registration request] A half-split rotating cylindrical body 4 equipped with a connecting part 2 that can be clamped and fixed to a metal pipe 1 that penetrates a concrete structure and can be freely attached and detached, a concrete cutter 5 that can freely rotate around the metal pipe 1, and the rotating cylindrical shape. body 4
drive device A for and the metal pipe 1
This pipe repair tool is provided with a manual movement operation section B for reciprocating the concrete cutter 5 together with the drive device A in the longitudinal direction of the pipe.