U.S. patent application number 14/898579 was filed with the patent office on 2016-05-12 for brush manufacturing method and brush.
This patent application is currently assigned to Hashimoto Brush Factory Co., Ltd.. The applicant listed for this patent is HASHIMOTO BRUSH FACTORY CO., LTD. Invention is credited to Hideaki HASHIMOTO.
Application Number | 20160128456 14/898579 |
Document ID | / |
Family ID | 50112407 |
Filed Date | 2016-05-12 |
United States Patent
Application |
20160128456 |
Kind Code |
A1 |
HASHIMOTO; Hideaki |
May 12, 2016 |
BRUSH MANUFACTURING METHOD AND BRUSH
Abstract
A plurality of bristle and core wire combination bodies each
comprising a bristle of resilient wire formed into the shape of
coil and a core wire of metal passed through the loops of the
bristle are formed. The same number of other core wires of metal as
the combination bodies are prepared. A core wire assembly is formed
by twisting alternately the core wires of said combination bodies
and the other core wires. A twisted wire body is formed by twisting
the core wire assembly continuously in the longitudinal direction,
in which a large number of loops of the bristles are arranged in a
spiral shape in the longitudinal direction along the twist of the
core wires. A plurality of rows of spiral brush bristles are formed
by cutting the loops of the bristles of the twisted wire body.
Inventors: |
HASHIMOTO; Hideaki;
(Ibaraki, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HASHIMOTO BRUSH FACTORY CO., LTD |
Inashiki-gun, Ibaraki |
|
JP |
|
|
Assignee: |
Hashimoto Brush Factory Co.,
Ltd.
Inashiki-gun, Ibaraki
JP
|
Family ID: |
50112407 |
Appl. No.: |
14/898579 |
Filed: |
March 20, 2014 |
PCT Filed: |
March 20, 2014 |
PCT NO: |
PCT/JP2014/057698 |
371 Date: |
December 15, 2015 |
Current U.S.
Class: |
15/206 ;
300/21 |
Current CPC
Class: |
A46B 3/18 20130101; A46D
3/05 20130101 |
International
Class: |
A46B 3/18 20060101
A46B003/18; A46D 3/05 20060101 A46D003/05 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 18, 2013 |
JP |
2013-127469 |
Claims
1. A method for manufacturing a brush having a plurality of rows of
brush bristles arranged, between a plurality of metal core wires
twisted continuously in the longitudinal direction, in spiral along
the twist of the core wires, characterized in comprising the steps
of forming a plurality of bristle and core wire combination bodies
each comprising a bristle of resilient wire formed into the shape
of coil and a core wire of metal passed through the loops of the
bristle; preparing the same number of other core wires of metal as
said combination bodies; forming a core wire assembly by
approaching the core wires of said combination bodies and said
other core wires and placing in the direction of rotation of
twisting alternately to thereby isolate the bristles between
different combination bodies by the other core wires; and twisting
said core wire assembly continuously in the longitudinal direction,
to thereby form a brush having a plurality of rows of loop-shaped
brush bristles arranged in spiral.
2. The method for manufacturing a brush according to claim 1,
further comprising a step of: cutting the formed loops of said
bristles after entire processes claimed in claim 1, to thereby form
a brush having brush bristles extending radially curbed in
substantially perpendicular direction with respect to the core
wire.
3. The method for manufacturing a brush according to claim 1,
wherein said core wire assembly is formed by alternately arranging
two said combination bodies and two said other core wires in the
direction of rotation of the twisting.
4. The method for manufacturing a brush according to claim 1,
wherein said core wire assembly is formed by alternately arranging
three said combination bodies and three said other core wires in
the direction of rotation of the twisting.
5. A brush manufactured by the method according to claim 1.
6. A brush having a row of brush bristles arranged, between a
plurality of core wires of metal twisted continuously in the
longitudinal direction, in spiral along the twisting of the core
wires, wherein said brush bristles are curved, and extending
radially in substantially perpendicular direction with respect to
said core wires, wherein, said plurality of core wires of metal
comprising the core wires of metal of the bristle and core wire
combination body claimed in claim 1, and the same number of other
core wires of metal as said core wire.
Description
TECHNICAL FIELD
[0001] The present invention relates to a method for manufacturing
a brush having a row of brush bristles arranged, between a
plurality of metal core wires twisted continuously in the
longitudinal direction, in spiral along the twist of the core
wires, and a brush manufactured by this method.
BACKGROUND OF THE ART
[0002] Conventionally, a brush having brush bristles held, between
twisted metal core wires, in spiral along the twist of the core
wires, is used for the various purposes such as industrial,
medical, and noncommercial uses. Brushes of this type, although the
size thereof vary from 1 mm or less to 100 mm or more depending on
the applications, are both manufactured in the similar way.
[0003] The Patent Document 1 discloses a method for manufacturing a
brush for polishing the inner periphery end surface of a magnetic
disk substrate wherein the brush bristles thereof are arranged in
double spiral (see FIG. 2B). This polishing brush is constituted by
sandwiching bristles between core wires at two different positions
of the four core wires followed by twisting these core wires
together. This brush has double spiral row of bristles, and is
called a "double spiral brush".
[0004] On the other hand, the Patent Document 2 discloses a torsion
brush manufactured by passing core wires through two cylindrical
coils respectively, and adding torsion to the core wires. Further,
the Patent Document 3 discloses a method for manufacturing a
mascara brush comprising, inserting a shaft member to each of two
to four spirally wounded fibers which becoming brush bristles,
twisting the shaft members to form a brush axis, to thereby
arranging a large number of fiber loops in spiral form around the
brush axis and forming a spiral groove between the rows of adjacent
loops (see FIG. 14).
PRIOR ART DOCUMENT
Patent Document
[0005] Patent document 1: Japanese Patent Publication No,
2006-15450 [0006] Patent document 2: Utility Model Registration No.
3009324 Gazette [0007] Patent document 3: Japanese Patent
Publication No, 2006-262984
SUMMARY OF INVENTION
Problem to be Solved
[0008] According to the method for manufacturing a brush disclosed
in the Paten Document 1, the bristles are required to bend into
substantially V-shape in the central portion in accordance with the
twist of the core wires. However, depending on the application,
when the bristles with more rigid are employed, the bristles may
not bend by simply twisting the core wires, and in this case, the
twist of the core wires inflating unevenly, so that it is not
possible to arrange the row of bristles orderly in spiral.
Therefore, such work is necessary as to apply a twist to the core
wires while bending the bristles to bring into close contact
between the core wires by applying a strong force to the two core
wires located in the center of the bristles. There is a problem
that this operation requires skill and is an inefficient work.
[0009] According to the methods for manufacturing a brush disclosed
in the Patent Documents 2 and 3, since the fibers of the spiral
brush bristles are in direct contact when twisting the core wires,
the other loop penetrates irregularly each other between adjacent
loops so that array of the spiral becomes irregular. This
phenomenon is remarkable when the thickness of the brush bristles
is different and when the spirals are not in close contact. Uniform
arrangement is not obtained when using brush bristles of different
fibers in material.
[0010] Accordingly, an object of the present invention is to
provide a method for manufacturing a brush efficiently and without
skill wherein the brush comprising loop-shaped brush bristles or
radially extended curved brush bristles forming a plurality of
spiral rows around core wires.
Means for Solving the Problems
[0011] Hereinafter, although the description is made with reference
to the signs of the accompanying drawings, the present invention is
not limited to thereto.
[0012] For solving the above problems, a method for manufacturing a
brush according to the present invention comprises the steps of:
forming a plurality of bristle and core wire combination bodies 7
each comprising a bristle 6 of resilient wire formed into the shape
of coil and a core wire 2 of metal passed through the loops of the
bristle 6; preparing the same number of other core wires 3 of metal
(other metal core wires) as the combination bodies 7; forming a
core wire assembly 8 by approaching the core wires 2 of the
combination bodies 7 and the other core wires 3 and placing in the
direction of rotation of twisting alternately; and twisting the
core wire assembly 8 continuously in the longitudinal direction, to
thereby form a brush having a number of loops 9 of the bristles
arranged in spiral in the longitudinal direction along the twist of
the core wires 2, 3.
[0013] According to another method for manufacturing a brush of the
present invention comprises additional step of cutting the loop 9
of the bristles 6 after said entire steps to thereby form a brush
having brush bristles extending radially curbed in substantially
perpendicular direction with respect to the core wires.
Effect of the Invention
[0014] According to the method of the present invention, it is
possible to manufacture a brush comprising loop-shaped brush
bristles arranged orderly to form a plurality of spiral rows around
core wires, without skill and efficiently.
[0015] According to the another method of the present invention, it
is possible to manufacture a brush comprising radially extended
curved brush bristles arranged orderly to form a plurality of
spiral rows around core wires, without skill and efficiently
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] FIG. 1 (A) is a front view, and (B) is a plan view of a
brush according to the present invention.
[0017] FIG. 2 (A) is a front view, and (B) is a plan view showing
the manufacturing process of the brush of FIG. 1.
[0018] FIG. 3 (A) is a front view, and (B) is a plan view showing
the manufacturing process of the brush of FIG. 1.
[0019] FIG. 4 (A) is a front view, and (B) is a plan view showing
the manufacturing process of the brush of FIG. 1 or finished body
of other brush.
[0020] FIG. 5 A plan view showing the manufacturing process of yet
another brush or finished body of the yet another brush.
MODE FOR CARRYING OUT THE INVENTION
[0021] Embodiments of the present invention will be described with
reference to the drawings.
[0022] In FIG. 1, a brush 1 comprises a shaft 4 having four metal
core wires 2, 2, 3, 3 which are continuously twisted in the
longitudinal direction, and rows of brush bristles 5 arranged in
spiral and held to the shaft 4. The brush bristles 5 extend to be
curved in a direction substantially perpendicular to the core wires
2, 3 and are arranged in spiral along the twist of the core wires
2, 3 at each between the core wire 2 and the core wire 3. The rows
of brush bristles 5 are arranged to form a double spiral around the
core wires 2, 3. As shown in FIG. 1(B), each of the brush bristles
5 is pressed at central portion by the core wire 2, and is
sandwiched between the other two core wires 3 adjacent to both
sides of the core wire 2. Therefore, the core wire 3 is interposed
between each spiral row of the brush bristles 5.
[0023] The manufacturing process of this brush is shown in FIGS. 2
to 4. In FIG. 2, the core wire 2 of metal is inserted into each of
two loops of bristles 6 to form two bristle and core wire
combination bodies 7, wherein the bristles 6 are made by forming an
resilient wire into coil shape and is used as the brush bristles 5.
On the other hand, two other core wires 3 of metal are prepared.
The bristle 6 may be either a single wire or a twisted wire.
[0024] In FIG. 3, the core wire 2 of the combination body 7 and the
other core wire 3 are approached, and as shown in FIG. 3 (B),
alternately arranged in the rotation direction of the twisting, and
bundled together to form a core wire assembly 8.
[0025] In FIG. 4, by twisting the core wire assembly 8 continuously
in the longitudinal direction, a large number of loops 9 of the
bristles 6 are arranged in a spiral shape in the longitudinal
direction along the twist of the core wires 2, 3 to form a twisted
wire body 10. This twisted wire body 10 constitutes a brush as one
embodiment of the present invention. This brush has a series of
brush bristles in loop. Since brush bristles will not fall out from
the core wire, this brush is suitable for cleaning of machinery and
equipment and the like that dislike the contamination in the
cleaning process.
[0026] Subsequently, by cutting the loops 9 of the bristles in the
twisted wire body 10 along the line C in FIG. 4, the brush 1 of the
embodiment shown in FIG. 1 is formed. This brush 1 has two rows of
spiral brush bristles 5 extending substantially radially around the
axis 4. The brush bristles 5 are curved substantially in an arc
shape. Incidentally, if necessary, bristles may be straight by
performing heat treatment or the like to correct the curvature.
[0027] Since the bristles 6 are a series up to the step of forming
a twisted wire body 10, the handling thereof is easy. Since the
bristles 6 are pre-curved in the direction to be refracted, they
are easily refracted by the pressure due to the twist between the
core wires 2 and 3. Therefore, such brush 1 can be easily
manufactured as the twist of the core wires 2, 3 is uniform and a
row of the brush bristles are arranged orderly in spiral.
[0028] A manufacturing process of the brush according to another
embodiment is shown in FIG. 5. In FIG. 5, three bristle and core
wire combination bodies 7 and three core wires 3 are prepared. Core
wires 2 passed through the coil-shaped bristles 6 and other core
wires 3 are approached and arranged alternately in the rotational
direction of the twisting, and the core wires 2, 3 are twisted
together. Thus, a brush with a looped brush bristle rows arranged
in triple spiral along the three core wires 2 is formed. Further,
by cutting the loops along line C, another brush bristles spreading
radially can be formed. By increasing the number of combination
body 7 and the core wire 3, it is possible to make the shaft 4
tougher, and the density of the brush bristles 5 can be increased.
In each case, by setting the combination body 7 and the core wire 3
in the same number, and by alternately placing the core wire 2 and
the core wire 3 in the direction of rotation of the twisting, it is
possible to interpose the core wire 3 between each spiral row of
brush bristles 5.
[0029] Each pair of core wires 2, 3 in FIG. 2 may be made by
folding a single metal wire. The core wire 3 may be of larger
diameter than the core wire 2. The shape of the loop coils of
bristles 6 is not limited to a circle and may be changed variously
in shape and size depending on the intended use. For the bristles
6, the different ones of the thickness, material and coil pitch may
be mixed. In addition, the coils having different diameters may be
overlapped double.
DESCRIPTION OF THE REFERENCE NUMBERS
[0030] 1 brush [0031] 2 core wire [0032] 3 core wire [0033] 4 shaft
[0034] 5 brush bristle [0035] 6 bristle [0036] 7 combination body
[0037] 8 core wire assembly [0038] 9 loop [0039] 10 twisted wire
body
* * * * *