JPH0434955Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is an improvement of a cleaning tool for cleaning limescale, metal rust powder, etc. adhering to the inner wall of a cooling water pipe installed in a factory, for example. It is related to.

[Conventional technology]

Conventionally, as a cleaning tool of this type, one is known in which a plurality of individual brushes each having a through hole in the center are stacked in the axial direction, and a flexible shaft is inserted into the through hole of each individual brush and fixed (in practice). Kaisho
58-186891).

The cleaning tool can remove deposits on the inner wall of the pipe by pressurizing liquid, gas, etc. into the pipe and running the cleaning tool.

Further, since the cleaning tool has a plurality of individual brushes connected by a flexible shaft, the cleaning tool is configured to be able to travel while being flexibly bent even if the pipeline has a curved portion.

Further, it is known that the brush itself has bristles fixed radially around the outer circumference of the bush in order to enhance the effect of removing deposits on the inner wall of the pipe (see Japanese Patent Publication No. 57-48989).

[The problem that the idea aims to solve]

By the way, when the cleaning tool travels through a curved portion of the pipeline, gaps are created between adjacent brushes, and the deposits removed from the inner wall of the pipe may fill the gaps. be.

In such a case, since the cleaning tool cannot flexibly bend the curved portion of the pipeline, the cleaning tool may become clogged inside and not only cannot be cleaned but also cannot be removed.

This invention was made in order to solve the above problem, and the object is to provide a cleaning tool that can flexibly bend the curved portion of the pipeline and perform accurate cleaning without causing clogging. With the goal.

[Means to solve the problem]

The cleaning tool according to this invention is characterized by forming an annular projection on one side of the single brush and a tapered recess on the other side with which the annular projection of another adjacent brush comes into slidable circular line contact. do.

[Effect]

According to the above configuration, deposits in the gap between the through hole of each brush and the flexible shaft are constantly removed by sliding between the annular protrusion of the brush and the tapered recess of another adjacent brush. , it is possible to achieve proper cleaning without causing clogging while flexibly bending the curved part of the pipeline.

[Example of idea]

An embodiment of this invention will be described below based on the drawings.

FIG. 1 is a front view showing a main part of a cleaning tool according to an embodiment of this invention in cross section. In the same figure, reference numeral 6 denotes a single brush, and a bush 8 having a through hole 7 in the center; As shown in FIG. 2, the brush bristles 9 are arranged in a radial manner on the outer periphery of the brush 6, and the brush 6 is integrally molded by injection molding of nylon or the like. Reference numeral 10 denotes a flexible shaft, which is made of a coil spring made of metal wire or elastic plastic. It has been inserted.

11a and 11b are a pair of pressure-receiving pieces each having a pressure-receiving surface 13 formed on the end face thereof, and the flexible shaft 10 has a plurality of brushes 6 stacked and inserted therein.
are attached to both ends with adhesive 12.

Next, FIG. 3 is a sectional view of the single brush 6, in which 8a is a tapered recess, 8b is an annular projection with an acute angle cross section, and these tapered recesses 8
a and an annular projection 8b are formed on both sides of the bush 8, respectively. As shown in FIG. 4, annular projections 8b of adjacent bushes 8 are always slidably in circular line contact with each tapered recess 8a of each bush 8.

When the cleaning tool configured as described above is used, even if the cleaning tool 2 comes to a position where the radius of curvature of the bent cooling water pipe 1 is small, the flexible shaft 10 in which a plurality of brushes 6 are stacked and inserted, Fourth
As shown in the figure, since the cleaning tool is easily bent in response to this, not only does the cleaning tool not stop inside the cooling water pipe 1, but also the flexible shaft 10
Even if the brush is bent, the annular protrusion 8 of the adjacent bush will fit into the tapered recess 8a of the bush of each brush unit 6.
b is always in circular line contact while sliding, so water scale, metal rust powder, etc. do not infiltrate into the gap between the through hole 7 of each brush unit 6 and the flexible shaft 10. Furthermore, since the bristles of the single brush are provided on the bush that is inserted into the flexible shaft, the bristles will not fall off even if the flexible shaft is bent.

〔effect〕

As described in detail above, this invention can provide a cleaning tool that can flexibly bend the curved portion of a pipeline and perform appropriate cleaning without causing clogging.

[Brief explanation of drawings]

Fig. 1 is a front view showing a main part of a cleaning tool according to an embodiment of the invention in cross section, Fig. 2 is a side view of the brush itself, Fig. 3 is a sectional view taken along the - line in Fig. FIG. 4 is an explanatory diagram of the operation of the brush alone. 6... Single brush, 7... Through hole, 8... Bush, 8a... Tapered recess, 8b... Annular projection,
9...Brush bristles, 10...Flexible shaft, 11a, 11b...Pressure receiving pieces. Note that the same reference numerals in the figures indicate the same parts.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of individual brushes each having brush bristles fixed radially around the outer periphery of a bush having a through hole in the center are laminated in the axial direction, and the through hole of each of the individual brushes is flexible. A cleaning tool in which a shaft is inserted through the flexible shaft and a pair of pressure-receiving pieces that receive a propelling fluid force are attached to both ends of the flexible shaft. A tapered recess is formed in which the annular protrusion of each brush unit is slidably in circular line contact, and deposits in the gap between the through hole of each brush unit and the flexible shaft are removed. cleaning tools. (2) The cleaning tool according to claim 1, wherein the pressure receiving piece is made of rubber.