JPH038091Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an abrasive brush manufactured by using steel wire as strands and binding them with a binding pipe.

[Prior art]

Conventionally, a bundle type abrasive brush has been manufactured by inserting a straight wire 1 into a pipe 2 and then pressing it from the outer periphery of the pipe 2 with a press mold 4 (see Fig. 4). A brush commonly called a channel type brush is manufactured by bending a wire into a U-shape, inserting a rod into the curved part in the shape of a bolt, and then pressing the brush (Utility Model Publication No. 36-33223 - However, wire is hair.)
There is.

[Problem that the invention attempts to solve]

However, the former pipe pressing type brush has the following drawbacks. In other words, a press is used to press between each of the many strands and between the strands and the pipe, and the strands are fixed only by the frictional force of the narrowed parts, but the cross-sectional shape of the strands, which are usually used as strands, is circular. In the case of steel wire, the friction area between each strand is small, and sufficient frictional force cannot be obtained.

Therefore, even when pressing with a strong pressing force, it is not possible to uniformly press down to the center of a large number of bundled strands.

When polishing is performed with the polishing brush obtained in the above, the strands near the center of the bundle of strands are removed, and adjacent strands are also removed sequentially or I lost my hair all at once,
Polishing becomes impossible.

In addition, the wires at the outer periphery are brought into close contact with the wall of the bundling pipe, and concentrated stress acts thereon, causing the wires to break, shortening the life of the brush and increasing the cost of brush work.

In addition, the haired or broken wires are scattered around, posing a danger to workers and causing safety problems.

In addition, with the latter of the conventional brushes mentioned above, the channel type brush, if the strands are hairs, the following problems do not occur, but if the strands are hard-to-bend steel wires, the following disadvantages occur: be. In other words, in an attempt to increase the polishing force, the diameter of the wire is
When using steel wire of 0.5 mm or more, the wire is curved into a U-shape, but as this radius of curvature has to be increased, the density of flocking per unit area decreases, resulting in a reduction in the quality of the manufactured brush. On the contrary, the polishing power decreases.

Contrary to the above, in order to increase the flocking density, the radius of curvature must be made smaller, and as a result, the strands are more likely to break at the bent portion or at the portion in close contact with the end of the pipe.

Furthermore, since the wire is inserted in a bolt-like manner and the wire is folded into two in a U-shape at this point, the wire will not be removed, but a large number of wires will be uneven, and depending on the direction of polishing, The polishing power decreases, and the strands do not fit into the rod and jump up and down during polishing, resulting in a decrease in the polishing power.

[Means for solving problems]

The present invention was developed as a result of various studies in view of the drawbacks of the conventional brushes mentioned above, and its gist is as follows.

That is, a bundling pipe, a bundle of strands made of a large number of straight steel wires whose base ends are inserted into the pipes and whose tips protrude, and which are made of a softer material than the strands and which are The wire has a length from the base end of the wire to at least the body of the pipe, and is inserted into the body of the pipe at the axial center of the bundle of wires parallel to the longitudinal direction of the wire. The pipe is made of a core metal material, and the body of the pipe is pressed from the outside to crush the core metal material and fix the bundle of strands.

[Action/Effect]

Since the present invention is constructed as described above, it has the following effects.

The material of the present invention can have a simple structure.

First, the wire used is a straight steel wire cut into a regular length. In addition, the binding fittings are pipes made by cutting long steel pipes into regular lengths.
After (the strands and core metal material have been inserted), the body portion is simply narrowed by a press, and is not formed into a lump shape. Further, the core metal material is obtained by cutting a linear material softer than the wire into a regular length.

As described above, since the material used in the present invention is easy to process, the manufacturing cost of the product, the brush of the present invention, can be lower than that of conventional products.

By constricting these three materials from the outside with a press, the gaps between the strands are eliminated,
In addition, the core material deforms under heavy pressure and blends well with the surrounding strands, creating a large frictional force between them, so the strands are less likely to come off or break at the close contact with the end of the pipe. Improves brush durability. Moreover, the wires do not break and scatter.

The core material is parallel to the axial direction of the bundle of wires and inserted into the axial center, and is not inserted in the shape of a bolt that divides the bundle of wires into two, as in conventional brushes. When polishing, there is no directionality, and the wires do not jump up and down during polishing, improving polishing power.

〔Example〕

Next, one embodiment of the bundled abrasive brush of the present invention will be described based on the drawings.

FIG. 1 shows one embodiment of the present invention, in which A is a longitudinal sectional front view of a bundled abrasive brush before press molding, B is a plan view, and C is a vertical sectional front view of a bundled abrasive brush after press molded. .

1 is a brush wire made of steel wire, and 2 is a bundling pipe. 3 is a core metal material that is softer than the wire 1 and has a length from the base end of the wire 1 to at least the body of the pipe 2; The bundle is inserted into the body of the pipe 2 parallel to the longitudinal direction of the strands 1 at the axial center of the bundle. 4 is a press die having an R-shaped protrusion 41 at the top that presses the binding pipe 2 from the outside toward the center.

First, a large number of wires 1 are wound around the core metal material 3 and inserted into the bundling pipe 2. This binding pipe 2 is pressed from its body (outside the longitudinally intermediate part of the pipe) toward its axial center by a press die 4 having an R-shaped protrusion 41 at the top.

This pressing deforms the bundling pipe 2, the multiple strands 1, and the core metal material 3, causing them to move toward the axial center along the R shape of the protrusion 41 more than the other parts that were not pressed. Bundling pipe 2 and wire 1
was bent into a streamlined shape, and the longitudinal middle part of the core metal material 3 was also crushed, so that it blended well with the many strands 1 (see FIG. 1C and FIG. 3).

Therefore, the protruding side of the wire 1 of the bundling pipe 2 is released from the state in which it is in close contact with the wire 1. After pressing, the bundled abrasive brush is removed from the press mold 4.

Although the bundle type abrasive brush manufactured in this way was molded with the same pressing force as the conventional one without a core metal material (see Figure 4), the reasons listed below are as follows: It becomes difficult to remove hair.

When a force is applied to the filament 1 in the direction of hair removal, the filament 1 resists due to the frictional force applied during the press (see FIG. 3).

Since the legs of the wire 1 are bent in a streamlined manner, the force P'' in the hair removal direction is dispersed into the force P' that attempts to straighten the bent wire 1, and that force P' is The adjacent strands 1 are pushed apart, and this force causes a frictional force (P'μ) between the adjacent strands 1 (see Fig. 3). That is, this frictional force (P'μ) is larger than the force P in the hair removal direction when the upper end of the pipe of a conventional channel brush is caulked, and this prevents hair removal.

Moreover, the bundling pipe 2 manufactured in this way
Because the strand 1 and the wall on the protruding side of the strand 1 are not in close contact with the wall compared to the case of conventional brushes, the concentrated stress on that part of the strand 1 is reduced, and the strand 1 does not break. has decreased.

The pressing force required for manufacturing in this manner is smaller than that of conventional methods, and therefore the press apparatus can be small. Therefore, an inexpensive brush can be obtained. In addition, the surface between the strands is less likely to be scratched, and the concentrated stress due to the pipe shape is reduced, reducing the possibility of breakage due to brush fatigue, resulting in a longer brush life. The risk of work accidents is also reduced.

In addition, since the core material is inserted parallel to the axes of a large number of steel wires, there is no bias in the bundle of steel wires, and a brush with high flocking density can be obtained. When polishing, there is no directionality and the polishing force increases. Furthermore, since the bundled polishing brush can be made smaller, the polishing device can be driven with less energy, resulting in lower running costs.

The present invention is not limited to the above embodiments, but
Additional changes may be made as long as they do not go against the gist of the claims for utility model registration.For example, the core metal material 3 is not limited to steel, but may also include aluminum. Also, it is sufficient if it is softer than the wire 1, and the core metal material 3 may be inserted after the wire 1, and the core metal material 3 is completely concentric with the bundling pipe 2. without the need for
Including those slightly deviated from the axis of pipe 2,
Further, the core metal material 3 is not limited to a cylindrical one, but also includes one with a polygonal cross-sectional shape, and the protrusion 41 has a cylindrical shape.
The press molding is not limited to stages, and a two-stage press mold 4 may be used for press molding. However, in this case, the second stage does not press the pipe 2 into a tap shape (see FIG. 2).

As mentioned above, the present invention is a brush with an extremely long lifespan compared to conventional bundled abrasive brushes, there is no risk of breakage and scattering, and it can be manufactured using a small press machine. , the running cost is low, and it is of practical importance.

[Brief explanation of drawings]

FIG. 1 shows one embodiment of the present invention, in which A is a vertical sectional front view of a bundled abrasive brush before press molding, B is a plan view thereof, and C is a vertical sectional front view of a bundled abrasive brush after press molded. FIG. 2 is a vertical sectional front view of a bundled abrasive brush according to another embodiment of the present invention, FIG. 3 is a partially enlarged view of FIG. 1 C, and FIG. 4 is a conventional brush, I to C are the same as those in FIG. 1, respectively. 1...Element wire (made of steel), 2...Bundling pipe, 3
...Core metal material (copper), 4...Press mold.

Claims (1)

[Scope of utility model registration request] A bundling pipe, a base end inserted into the pipe,
and a bundle of multiple straight steel wires with protruding tips, which is made of a softer material than the wires, and has a length from the base end of the wires to at least the body of the pipe. and a core metal material inserted into the body of the pipe at the axial center of the bundle of strands in parallel to the longitudinal direction of the strands, and the body of the pipe is exposed from the outside. A bundle type abrasive brush characterized in that the bundle of wires is fixed by being pressed so that the core metal material is also crushed.