JPH0513479Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The present invention relates to a pipe inner surface polishing device for polishing the inner surface of a small diameter pipe such as a telecommunications cable pipe buried underground. be.

Problems to be solved by conventional techniques and ideas Conventionally, as a device for polishing the inner surface of a small-diameter pipe line buried underground, a wire brush fixed to a rotating shaft is inserted into the pipe and the wire brush is rotated. There is a device that spreads the bristles of a wire brush and polishes the inner surface of the tube.

However, when polishing the inner surface of a pipe where the inner surface of the pipe has been painted, etc., when the wire brush is inserted, the bristles of the wire brush move forward while being dragged along the inner surface of the pipe. They have disadvantages such as damaging the paint on the inner surface of pipes, and the bristles of the wire brush getting caught in joints of small-diameter pipes, increasing the insertion force of the wire brush.

Furthermore, with this type of conventional device, once the wire brush has been used, the bristles become spread out.
Reusing it tended to increase the aforementioned drawbacks.

The purpose of this invention is to prevent the above-mentioned drawbacks when polishing the inner surface of a pipe whose inner surface is coated with paint, etc., from scratching the inner surface of the pipe, and from increasing the insertion force during insertion. The object of the present invention is to provide a polishing device for the inner surface of a tube that solves the problem.

Means for Solving the Problems The present invention provides a polishing device that polishes the inner surface of a tube using a wire brush attached to the tip of a rotating shaft.
The wire brush is provided with a short cylindrical tube having an inner diameter in which all the bristles of the wire brush are housed inside in a dense state and can be slid back and forth,
One end of the short tube is connected to a non-rotating part of the polishing device with a plurality of wires.

Function When polishing the inner surface of a pipe whose inner surface is coated with paint, etc., this invention prevents the bristles of the wire brush from damaging the inner surface of the pipe other than the area to be polished when inserting the wire brush. In addition, the structure is such that the insertion force does not increase during insertion, and the gist is that one end of the multiple wires is connected to the non-rotating part of the polishing device, and the other end is connected to the wire brush with all the bristles densely packed. The wire brush is connected to a short circular tube having an inner diameter that can be accommodated inside, and all the bristles of the wire brush are housed in the short circular tube.

When polishing the inner surface of a pipe that has been painted with a conventional device, when inserting a wire brush, the bristles of the wire brush may damage the paint on the inner surface of the pipe other than the area to be polished. In contrast to the increased insertion force, the present invention has a structure in which the bristles of the wire brush are inserted into the polishing area with the tips protected by a short circular tube, and the short circular tube is removed by rotating the wire brush at that location. Because of this, when inserting the wire brush, the bristles of the wire brush do not damage the paint on the inner surface of the tube other than the area to be polished, and only that area can be polished, and the insertion force does not increase when inserting the brush compared to conventional methods. Different from technology.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a perspective view of an apparatus for polishing the inner surface of a tube according to the present invention.

In the figure, 1 is a flexible shaft, 15
is a rotating shaft provided inside the flexible shaft 1, 2 is a non-rotating part attached to the outside of the flexible shaft 1, 3 is a rotating shaft, 4 is a connecting wire, 5 is a wire brush, and 6 is the bristles of the wire brush 5. It shows a short circular tube with an inner diameter that allows the entire tip to be stored tightly inside and allows for free sliding.

The configuration of the tube inner surface polishing device of the present invention will be explained.

The rotating shaft 15 and the rotating shaft 3 are connected inside the non-rotating part 2, the wire brush 5 is fixed to the tip of the rotating shaft 3, and all the bristles of the wire brush 5 are housed inside the circular short tube 6. The short tube 6 is configured to be able to slide on the tip of the hair, and the connecting wire 4 is connected to the non-rotating portion 2 and the circular short tube 6 at positions corresponding to both ends of the two diameters.

The operation of the tube inner surface polishing device of the present invention will be explained.

When a rotational force is applied to the rotating shaft 15, the rotating shaft 15 rotates the rotating shaft 3, and the wire brush 5 fixed to the rotating shaft 3 is rotated.

Since the circular short tube 6 stores all the bristles of the wire brush 5 inside in a dense manner, due to the resistance, the wire brush 5 starts rotating in synchronization with the rotation of the wire brush 5 at the beginning of rotation, and becomes circular. The wire 4 connected to the short tube 6 and the non-rotating part 2 is twisted around the rotating shaft 3, and the circular short tube 6 is drawn toward the non-rotating part 2 as the moving wire brush 5 continues to rotate. The wire 4 is further twisted, the short circular tube 6 is detached from the wire brush 5, the resistance between the wire brush 5 and the inside of the short circular tube 6 is eliminated, and the wire brush 5 is removed.
The short circular tube 6, which had been rotating in sync with this, stops rotating, and the bristles of the wire brush 5 spread out enough to polish the inner surface of the tube (Figure 2).

Note that if the sleeve 12 is inserted and placed on the outside of the rotating shaft 3 as shown in FIG.
Prevents tangling.

When the polishing is finished, the flexible shaft 1 is pulled out and the short tube 6 is reattached to the wire brush 5 in preparation for the next use. FIG. 4 shows an explanatory diagram of the usage state of the tube inner surface polishing device of the present invention.

In the figure, 7 is a manhole, 8 is a pipeline to be polished, 9 is a pipe opening, 10 is a rotating engine that drives a rotating shaft 15 in a flexible shaft,
11 shows a polishing device for the inner surface of a tube according to the present invention.

Insert the tube inner surface polishing device 11 of the present invention from the pipe opening 9 of the pipe line 8 to be polished in the manhole 7 to the polishing location in the device form shown in FIG. By storing it in the circular short tube 6, it will not easily come off due to mutual friction), and then the engine 10 is started.

When the engine 10 is started, the rotational force is transmitted to the rotating shaft 15, and as shown in FIG. 2, the bristles of the wire brush 5 are sufficiently spread to polish the inner surface of the tube.

Effects of the invention As explained above, when polishing the inner surface of a pipe where the inner surface of the pipe has been coated with paint, etc., when inserting the wire brush, the bristles of the wire brush can damage the paint, etc. on the inner surface of the pipe other than the area to be polished. Everything is stored inside a short circular tube, and the short circular tube can be removed from the wire brush at the point of polishing, so it does not damage the paint on the inner surface of the tube other than the point being polished, and only cleans the area in question. It has the advantage of being able to be polished.

Further, during insertion, all the bristles of the wire brush are housed in the short tube, so there is no insertion resistance due to the wire brush, and there is an advantage that the polishing device can be inserted smoothly.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the apparatus for polishing the inner surface of a tube according to the present invention, and FIG. 2 is a perspective view of the apparatus for polishing the inner surface of a tube according to the present invention, with the bristles of the wire brush exposed from the short tube without contact. , Fig. 3 is a perspective view of the tube inner surface polishing device of the present invention in which a sleeve is attached to the outer periphery of the rotating shaft fixed to the base of the wire brush, and Fig. 4 is an explanation of the usage state of the tube inner surface polishing device of the present invention. The figure shows. 1... Flexible shaft, 2... Non-rotating part, 3... Rotating shaft, 4... Connecting wire, 5... Wire brush, 6... Circular short tube, 7... Manhole, 8... Pipe to be polished Route, 9...Tube mouth, 10...
Engine, 11... tube inner surface polishing device, 12...
sleeve.

Claims (1)

[Scope of utility model registration request] In a polishing device that polishes the inner surface of a tube with a wire brush attached to the tip of a rotating shaft, the wire brush has an inner diameter such that all the bristles of the wire brush are housed inside in a dense state and can freely slide back and forth. 1. An apparatus for polishing an inner surface of a tube, characterized in that a short cylindrical tube is provided, and one end of the short tube is connected to a non-rotating part of the polishing apparatus by a plurality of wires.