JP4037653B2 - Rotating brush manufacturing method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for manufacturing a rotating brush used in a roll toothbrush suitable for removing plaque adhering to a tooth and massaging a gum.
[0002]
[Prior art]
The present inventor has proposed a roll toothbrush suitable for removing plaque adhering to a tooth and massaging a gum, and a method for producing the same (Japanese Patent Laid-Open No. 12-83736). Its content is that hemispherical welds are formed by heating and welding one end of a group of strands made of many strands of nylon or the like assembled into a bundle, and then the welds are pressurized to form a flat shape. To do. Following this, the portion that becomes the shaft hole of the flat portion is cut and further pressed to make the entire strand group substantially circular and the flat portion substantially circular. Thereafter, both ends of the flat portion are joined by welding or the like to form an annular portion, and a sheet-like brush unit is manufactured. And the annular part of the brush single-piece | unit obtained in this way is joined, and the plurality of brush single-piece | units are connected, A roller-shaped rotary brush is formed. This rotary brush is a roll toothbrush that is supported at one end of the handle member through a support shaft so as to freely rotate.
[0003]
[Problems to be solved by the invention]
By the way, the rotating brush manufactured as described above requires a skill to make the thickness of the annular portion uniform, and to make the density of the bristles of the rotating brush uniform, and includes a process that is difficult to mechanize, Consistent continuous production is difficult, mass production is difficult, and production costs are high.
[0004]
Therefore, the present invention further improves the previously proposed one, and makes the hair density of the rotating brush uniform so that it is excellent in plaque removal and gum massage effect, and the cost can be reduced. It is an object of the present invention to provide a method and an apparatus for manufacturing a brush.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is a method of manufacturing a single brush unit for manufacturing a sheet-like brush unit for forming the rotary brush, wherein a plurality of strands are assembled into a bundle. A step of projecting a certain amount outward from the circular insertion hole provided in the base, a step of pushing the strand group in the radial direction by inserting a cone into the center of the protruding end of the strand group, And a step of welding the central portion of the strand group in a ring shape while the strand group is fixed to the pedestal, and a step of cutting the inside of the annular welded portion into a circle at the position of the upper edge of the insertion hole Thus, a sheet-like brush having a hub at the center and a large number of hair feet (elements) projecting radially from the hub is formed.
The manufacturing method of the rotating brush according to claim 2 of the present invention includes a step of projecting a certain amount outward from a circular insertion hole provided in the base, a strand group in which a number of strands are gathered in a bundle, Inserting a cone in the center of the protruding end of the strand group to push the strand group in the radial direction, and welding the center of the strand group in an annular shape with the pushed strand group fixed to the pedestal A sheet having a hub at the center and a large number of bristle feet (wires) protruding radially from the hub by cutting the inside of the welded portion into a circle at the position of the upper edge of the insertion hole. Forming a single brush-like brush, inserting and holding an axial pipe in the hub of the brush, and removing the brush alone together with the axial pipe from the base. Repeat to insert and hold multiple brushes in the shaft pipe. It allows to form multiple roll-shaped rotary brush bristles is projected radially.
[0006]
As described above, a rotating brush for a roll toothbrush having a uniform bristle foot density and excellent plaque removal and gum massaging effects can be obtained continuously and efficiently at low cost.
In the manufacturing method described above, it is preferable that the ends of the bristles of the rotating brush are aligned and the finishing process is performed. In this way, a better rotating brush can be obtained.
[0007]
The invention according to claim 4 of the present invention is a pedestal provided with a circular insertion hole for passing a group of strands formed by assembling a number of strands in a bundle, and a fixed amount from the insertion hole of the pedestal by grasping the strand group. A chuck that holds and protrudes, a cone that is inserted into the center of the protruding end of the strand group to push the strand group in the radial direction, a presser that fixes the pushed strand group to the base, and a strand group A welding machine that annularly welds the outer periphery of the insertion hole at the center portion of the wire group in a state where the wire group is fixed to the base, and the position of the upper periphery of the insertion hole at the inside of the welding portion of the wire group It is the brush single-piece manufacturing apparatus of a rotary brush provided with the cutting machine cut | disconnected circularly .
[0008]
According to a fifth aspect of the present invention, there is provided a rotating brush manufacturing apparatus comprising: a pedestal provided with a circular insertion hole for passing a group of strands formed by collecting a number of strands in a bundle; A chuck that holds a certain amount of protrusion from the hole, a cone that is inserted into the center of the protruding end of the strand group to push the strand group in the radial direction, and a presser that fixes the pushed strand group to the base. the a welder to weld the annular outside the position of the upper end periphery of the insertion hole in the central portion of the strand group in a state of fixing the strand group to the base, the inner leaving welded portion of the strand group A sheet-shaped brush unit with a hub at the center and a large number of bristle feet (elementary wires) protruding radially outward from the hub by cutting it into a circle at the position of the top edge of the insertion hole. After inserting and holding the shaft pipe into the hub of this cutting machine and the hub of this brush alone, And a pipe hand machine to take out to the outside of the brush alone from the base along with the axial center pipe.
[0009]
By using this apparatus, the method of the present invention can be easily carried out and the intended purpose can be achieved.
[0010]
In the above apparatus, it is preferable that a cutter for cutting and aligning the tips of the bristles while rotating the rotating brush and a finishing machine for rounding the tips of the bristles are provided. Thereby, a better rotating brush is obtained.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1-9 has shown each process when manufacturing a rotating brush with the manufacturing method of this invention. FIG. 1 shows a main part of a manufacturing apparatus that performs the method. That is, a pedestal 2 provided with an insertion hole 2a through which the strand group 1 passes, and a lower and upper side of the base 2 are provided so as to be movable up and down, and a pair of upper and lower first and second sets that grip and separate the strand group 1 A group of strands 1 provided above the chucks 31 and 32 and the insertion holes 2a of the pedestal 2, gripped by the chucks 31 and 32, and projecting upward from the insertion holes 2a of the pedestal 2 by a certain amount. A cone 4 that is inserted into the center of the insertion upper part side to push the strand group 1 in the radial direction, and a cylindrical shape that is also provided above the pedestal 2 and fixes the pushed strand group 1 on the pedestal 2. Presser body 5.
[0012]
Further, above the pedestal 2, the central portion of the strand group 1 is welded in a state where the strand group 1 is fixed on the pedestal 2, for example, an ultrasonic welding machine 6, and the strand group 1 is welded. The axial pipe 9 is inserted into the cutting unit 7 that cuts the inside while leaving at least a part, and the brush unit 8 formed from the wire group 1 by the welding machine 6 and the cutting machine 7, so that the axial pipe is formed. A pipe hand machine 10 is provided which inserts and holds a plurality of brushes, and takes out the brushes 8 together with the shaft pipes 9 from the base 2 after inserting and holding them. When a predetermined number of brushes 8 are inserted and held in the shaft pipe 9, the pipe hand machine 10 removes this from the holder (not shown) in which a plurality of the shaft pipes 9 are stored. Are sequentially taken out and set in the pipe hand machine 10.
In FIG. 1, the welding machine 6, the cutting machine 7, and the pipe hand machine 10 are separated from the upper side of the strand group 1 to the left and right, but when performing the processing, Move upward to perform the required processing. Conversely, the pedestal may move in the horizontal direction.
[0013]
First, as shown in FIG. 1, for example, a strand group 1 formed by assembling strands 1a made of thermoplastic resin such as nylon in a bundle is gripped by the first and second chucks 31 and 32. As a result of the upward movement, the wire group 1 is held in a state of protruding a certain amount upward from the insertion hole 2 a of the base 2. The movement of the chucks 31 and 32 will be described in detail later.
[0014]
Next, as shown in FIG. 2, the cone 4 is lowered, the conical protrusion 4a at the lower end thereof is inserted into the center of the projecting upper end of the strand group 1, and the strand group 1 is pushed open in the radial direction. Subsequently, as shown in FIG. 3, the presser body 5 is lowered and fixed on the base 2 in a state where the strand group 1 is pushed open.
The presser body 5 has, for example, a cylindrical lower end surface. The presser body 5 presses the center part of the strand group 1 pushed open in the radial direction. The cone 4 having the downward cone-shaped protrusion is retracted while being pressed by the presser body 5 so that the welding machine 6 can be inserted. The room for the space where the tip of the welding machine enters is left inside the presser body 5. The presser body 5 holds the wire group between the pedestal 2 and holds it firmly to the extent that it does not move.
[0015]
Thereafter, as shown in FIG. 4, the cone 4 is retracted in a state where the pushed wire group 1 is fixed to the base 2 by the presser body 5. Subsequently, the welding machine 6 moves to a position directly above the center of the strand group 1 and enters the presser body 5, and the periphery of the center of the strand group 1 pushed open by the tip of the welding machine 6 is circular. To be welded.
A welding machine using ultrasonic waves can be suitably used, and a circular welding tool 6a is provided at the tip. Inside the presser body 5, the strand group 1 pushed open between the pedestal 2 is pressed and welded. It is preferable that the inner periphery of the welded portion 81 by the welder 6 be adapted to the upper end periphery 2b of the insertion hole 2a.
[0016]
After welding, as shown in FIG. 5, the welding machine 6 moves backward, and subsequently, the cutting machine 7 moves to a position directly above the center of the strand group 1 and enters the presser body 5, The inner peripheral portion 81a of the welded portion 81 of the strand group 1 that has been pushed open is cut into a circular shape by the tip of the cutting machine 7.
The cutting machine 7 of the embodiment shown in the figure is formed in a truncated conical surface 7a whose outer peripheral surface of the tip is inclined with respect to the center line, and the circular conical surface 7a and the circular insertion hole 2a of the pedestal 2 are formed. A wire group is sandwiched between the upper edge 2b of the wire and cut. By cutting between the truncated conical surface 7a and the upper edge 2b of the insertion hole 2a and cutting, it is possible to produce a single brush having a uniform thickness and to cut continuously and repeatedly. It was. The frustoconical surface 7a and the upper edge 2b of the insertion hole 2a are formed of a material having a required hardness or the like so that the cutting process can be repeated many times. Alternatively, a required heat treatment is performed.
In this way, the sheet-like brush unit 8 having the hub (welding portion) 81 at the center and projecting a large number of hair feet (element wires) 82 in the radial direction from the hub 81 is formed (FIG. 6). reference). The welding around the center of the wire group 1 by the welding machine 6 and the cutting of the inner part of the welding part by the cutting machine 7 may be performed in the reverse order. That is, after the center portion of the wire group 1 is cut into a circular shape by the cutting machine 7, the periphery thereof may be welded in an annular shape by the welding machine 6.
In this way, the wire group 1 is welded in an annular shape while being fixed on the pedestal, and the inside of the portion to be welded is also fixed while being fixed on the pedestal, so that the thickness of the welded portion 81 is uniform. Finished.
[0017]
Thereafter, the first and second chucks 31 and 32 are both lowered while holding the strand group 1, and the strand group 1 is temporarily moved below the insertion hole 2a as shown in FIG. Retreat. Subsequently, with the shaft pipe 9 being held, the pipe hand machine 10 moves to a position directly above the center of the hub 81 of the brush unit 8 manufactured on the base 2, and as shown in FIG. As the hand machine 10 descends, the shaft center pipe 9 enters the insertion hole 2 a of the base 2 from the hub 81, and the brush unit 8 is inserted and held in the shaft center pipe 9.
[0018]
After the brush unit 8 is inserted and held in the shaft pipe 9, the pipe hand machine 10 rises and the brush unit 8 is taken out from the pedestal 2 together with the shaft pipe 9. Wait in position.
[0019]
When the wire group 1 is once retracted downward in the insertion hole 2a, the second chuck 32 is opened and moved downward while the first chuck 31 remains closed, and moved downward by a predetermined amount. After that, it is closed and the wire group 1 is grasped again. Thereafter, the first chuck 31 is released, and the second chuck 32 is raised to a predetermined position. Then, after the predetermined position is raised, the first chuck 31 is closed, and after these operations are finished, the chucks 31 and 32 are both raised, and the wire group 1 grasped by these is inserted into the base 2. A certain amount of protrusion is held upward from the hole 2a. By doing so, a certain amount of the wire group 1 can be protruded and held upward from the insertion hole 2a of the base 2 without causing the wire group 1 to drop downward.
[0020]
These steps are repeated, and the single brushes 8 are sequentially inserted and held in the shaft center pipe 9 as shown in FIG. After a predetermined number of brushes 8 are inserted and held in the shaft pipe 9, the shaft pipe 9 and the brushes 8 are removed from the pipe hand machine 10, and the pipe hand machine 10 receives a new one from the holder. The shaft pipe 9 is taken out and set. Further, after being taken out from the pipe hand machine 10, the brush unit 8 is fixed to the shaft pipe 9 as shown in FIG. In the embodiments shown in the drawings, a flange 91 is integrally formed at one end in the length direction, and an axial pipe 9 made of a thermoplastic resin such as nylon having an annular receiving groove 92 at the other end is used. The brushes 8 are sequentially inserted from the receiving groove 92 side with the portion 91 positioned upward. Then, after a predetermined number of brushes 8 are inserted and held, a cylindrical portion 94 having a projection 93 inserted into the receiving groove 92 and made of the same material as the shaft pipe 9 is used. The protrusion 93 is inserted into the receiving groove 92, the lid 94 is joined to the shaft center pipe 9 by a sealing means using ultrasonic waves, and a predetermined number of brushes 8 are fixed on the shaft center pipe 9, thereby rotating the brush 11. Is produced.
[0021]
FIG. 10 is a plan view of an apparatus used when post-processing the rotary brush 11 described above, and FIG. 11 is a side view showing an essential part of the apparatus. In each figure, a plurality of pins 14 into which the axial pipe 9 of the rotating brush 11 can be inserted are provided on the outer peripheral portion of the upper surface of the turntable 13 which is rotationally driven by the motor 12 in the direction of arrow R. A rubber roll 15 that contacts the rotating brush 11 inserted into the pin 14 and a cutter 16 such as a clipper are disposed at the outer peripheral position 13. Then, while rotating the rotating brush 11 inserted into the pin 14 by the rubber roll 15, the ends of the bristle feet 82 of the rotating brush 11 are cut and aligned by the cutter 16.
[0022]
Further, at the rear position in the rotation direction of the cutter 16 on the turntable 13, two finishing processing machines 17 such as a grinder that come into contact with the tips of the hair feet 82 of the rotating brush 11 inserted into the pins 14 are arranged in the front and rear. . By rotating these finishing processing machines 17 forward and backward, the tips of the bristle feet 82 of the rotating brush 11 are rounded.
[0023]
Furthermore, in each embodiment shown in the drawings, an anti-removal prevention tool 18 for the rotary brush 11 is disposed at the top of the finishing processor 17, and a finishing process is performed at a position behind the finishing processor 17 in the turntable 13 in the rotation direction. An unloader 19 for taking out the rotating brush 11 from the pin 14 is arranged. In FIG. 11, 20 is a sensor for confirming the setting of the rotating brush 11 to the pin 14 and driving the finishing machine 17, and 21 is a sensor for confirming removal of the rotating brush 11 from the pin 14 by the unloader 19. is there. In FIG. 10, L indicates a range in which the rotating brush 11 is set on the pin 14 on the turntable 13.
[0024]
FIG. 12 is a perspective view of the roll toothbrush 22 equipped with the rotating brush 11 obtained as described above. The toothbrush 22 is formed by rotatably supporting the rotary brush 11 at one end in the length direction of the handle member 23 via a support shaft 24.
[0025]
FIGS. 13 and 14 are cross-sectional views for explaining a state when the rotating brush 11 obtained as described above is set on the handle member 23 of the roll toothbrush 22. First, as shown in FIG. 13, the rotary brush 11 is interposed between the support pieces 23 a, 23 a on both sides formed at one end in the length direction of the handle member 23, and the axis of the rotary brush 11 starts from one support piece 23 a. A support shaft 24 having a head 24 a is inserted into the other support piece 23 a through the pipe 9, and the other end side of the rear support shaft 24 is crushed, whereby the rotary brush 11 is connected to the handle member 23 via the support shaft 24. To support freely in rotation.
[0026]
In the embodiments shown in the drawings, recessed portions 23b and 23b are formed in the support pieces 23a of the handle member 23, respectively, and the head portion 24a of the support shaft 24 and the crushing portion 24b on the other end side are positioned therein. I am letting. The head 24a of the support shaft 24 is non-circular, and the recessed portion 23b of the support piece 23a that receives the head 24a is preferably non-circular. In this way, the rotating brush 11 around the support shaft 24 is used. Can be rotated smoothly.
[0027]
【The invention's effect】
As described above, according to the present invention, it is possible to continuously produce a rotating brush that has a uniform bristle foot density and is excellent in plaque removal and gum massaging effects at low cost.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a main part of a manufacturing apparatus when a rotating brush is manufactured by the manufacturing method of the present invention.
FIG. 2 is a cross-sectional view showing a step of opening a strand group with a cone.
FIG. 3 is a cross-sectional view showing a process of pressing and opening with a cone and pressing with a presser.
FIG. 4 is a cross-sectional view showing a process of pressing with a presser and welding with a welding machine.
FIG. 5 is a cross-sectional view showing a step of cutting the inside of the welded portion.
6 is a cross-sectional view showing a process of inserting and holding a brush unit 8 in an axial pipe 9. FIG.
FIG. 7 is a cross-sectional view showing a process of inserting and holding a brush unit 8 in an axial pipe 9;
8 is a cross-sectional view showing a process in which a predetermined number of brushes 8 are inserted and held in an axial pipe 9. FIG.
9 is a cross-sectional view of a rotating brush in which a predetermined number of brushes 8 are inserted and held in an axial pipe 9. FIG.
FIG. 10 is a plan view of an apparatus used when post-processing a rotating brush.
FIG. 11 is a side view showing the main part in an expanded state.
FIG. 12 is a perspective view of a roll toothbrush with a rotating brush attached.
FIG. 13 is a partial cross-sectional view for explaining a state when a rotating brush is attached to a handle to make a roll toothbrush.
FIG. 14 is a partial cross-sectional view for explaining a state when a rotating brush is attached to a handle to form a roll toothbrush.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Wire group 2a Wire 2 Pedestal 2a Insertion hole 31, 32 Chuck 4 Cone 5 Presser body 6 Welding machine 7 Cutting machine 8 Brush unit 81 Hub 82 Hair foot 9 Axial pipe 10 Pipe hand machine 11 Rotating brush 16 Cutter 17 Finish Processing machine

Claims (6)

A method of manufacturing a brush unit that forms a rotating brush by stacking a large number of sheets,
A group of strands formed by assembling a large number of strands into a bundle is projected outward by a certain amount from a circular insertion hole provided in the base,
Insert a cone in the center of the protruding end of this strand of wire to push open the strand of wire in the radial direction,
In a state where the pushed strand group is fixed to the pedestal, the center portion of the strand group is welded in an annular shape, and the inside of the annular welded portion is cut into a circle at the position of the upper edge of the insertion hole A method for manufacturing a single brush unit having a hub at the center and forming a sheet-like brush unit in which a large number of bristle feet (elements) protrude radially from the hub A group of strands formed by assembling a large number of strands in a bundle shape is projected outward by a certain amount from a circular insertion hole provided in the base,
Insert a cone in the center of the protruding end of this strand of wire to push open the strand of wire in the radial direction,
The center part of the strand group is welded in an annular shape with the pushed strand group fixed to the pedestal,
By cutting the inside of the annular welded portion into a circle at the position of the upper edge of the insertion hole , a hub is formed at the center, and a sheet-like shape in which a large number of bristle feet (wires) protrude radially from the hub. Form a single brush,
Insert and hold the shaft pipe into the hub of this brush alone,
Take out the brush alone with the shaft pipe from the base,
A method of manufacturing a rotating brush that repeats these steps and inserts and holds a plurality of brushes into an axial pipe to form a rotating rotating brush in which a large number of hairs protrude radially.   3. The method of manufacturing a rotating brush according to claim 2, wherein the tips of the bristles of the rotating brush are trimmed and finish processing is performed. A pedestal provided with a circular insertion hole for passing a group of strands formed by collecting a number of strands in a bundle;
A chuck that holds the wire group and protrudes and holds a certain amount from the insertion hole of the pedestal;
A cone that is inserted into the center of the protruding end of the strand group and pushes the strand group radially,
A presser body for fixing the pushed wire group to the base,
A welding machine that welds the outer side in a ring shape from the position of the upper peripheral edge of the insertion hole in the center part of the strand group in a state where the strand group is fixed to the pedestal;
A cutting machine for cutting the inside of the welded part of the strand group into a circle at the position of the upper edge of the insertion hole ;
A device for manufacturing a single brush unit of a rotating brush. A pedestal provided with a circular insertion hole for passing a group of strands formed by collecting a number of strands in a bundle;
A chuck that holds the wire group and protrudes and holds a certain amount from the insertion hole of the pedestal;
A cone that is inserted into the center of the protruding end of the strand group and pushes the strand group radially,
A presser body for fixing the pushed wire group to the base,
A welding machine that welds the outer side in a ring shape from the position of the upper peripheral edge of the insertion hole in the center part of the strand group in a state where the strand group is fixed to the pedestal;
By cutting the inner side in a circular shape at the position of the upper end periphery of the insertion hole leaving the welded portion of this strand group, it has a hub at the center, and a large number of bristle legs (from the hub toward the radially outer side) A cutting machine for forming a sheet-like brush unit with a protruding wire),
An apparatus for manufacturing a rotating brush, comprising: a pipe hand machine that inserts and holds an axial pipe in the hub of the brush alone, and takes out the brush alone together with the axial pipe from the pedestal after being inserted and held.   6. The rotating brush manufacturing apparatus according to claim 5, comprising a cutter that cuts and aligns the tips of the bristles while rotating the rotating brush, and a finishing processor that rounds the tips of the bristles.

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