HK1078749B - Method and device for manufacturing rotary brush and roll tooth brush - Google Patents

Description

Method and apparatus for manufacturing rotary brush and rolling toothbrush

Technical Field

The present invention relates to a rotary brush for a rolling toothbrush suitable for removing plaque attached to teeth and massaging gums, a method of manufacturing the rolling toothbrush, and a device therefor.

Background

The present inventors have previously proposed a rolling toothbrush suitable for removing plaque attached to teeth and massaging gums, and a method for manufacturing the same (Japanese patent application laid-open No. H12-83736). The contents of the method are that one end of a monofilament group is welded by heating to form a hemispherical welded part, and then the welded part is pressed to be flat, wherein the monofilament group is formed by gathering a plurality of monofilaments such as nylon into a bundle shape. Next, the axial hole portion of the flat portion is cut, and the entire monofilament group is made substantially circular by pressing, and the flat portion is made substantially circular. Then, both ends of the flat portion are joined by welding or the like to form a ring shape, thereby forming a sheet-like brush element. The annular portions of the single brush bodies thus obtained are joined to each other and a plurality of the single brush bodies are connected to each other, thereby forming a roller-shaped rotating brush. The rotating brush is rotatably supported at one end of the handle member via a support shaft, thereby forming a rolling toothbrush.

However, the rotary brush manufactured as described above requires a skilled technique for equalizing the thickness of the annular portion and the bristle density of the rotary brush, and also includes a step difficult to mechanize, so that it is difficult to perform continuous manufacturing in combination, and mass production is difficult, resulting in an increase in manufacturing cost.

Accordingly, an object of the present invention is to provide a rotary brush for a rolling toothbrush, which is further improved in the previously proposed invention, has an even bristle density of the rotary brush, is excellent in plaque removal and gum massaging effects, and can achieve a reduction in cost, and a method and an apparatus for manufacturing the rolling toothbrush.

Disclosure of Invention

In order to achieve the above object, the invention according to claim 1 is a method for manufacturing a brush unit for manufacturing a sheet-like brush unit for forming a rotating brush, the method comprising: a step of projecting a monofilament group formed by gathering a plurality of monofilaments into a bundle shape to the outside by a predetermined amount from an insertion hole provided in a base; inserting a cone-shaped bobbin into the center of the protruding end of the monofilament group to push the monofilament group radially; a step of welding the center part of the monofilament group into a ring shape while fixing the monofilament group pushed open on the base; cutting the inner side of the annular welded part; through these steps, a sheet-like brush element having an insertion hole at the center thereof and a plurality of bristles (monofilaments) radially protruding from the insertion hole is formed.

The method for manufacturing a rotary brush according to claim 2 of the present invention includes the steps of: a step of projecting a monofilament group formed by gathering a plurality of monofilaments into a bundle shape to the outside by a predetermined amount from an insertion hole provided in a base; inserting a cone-shaped bobbin into the center of the protruding end of the monofilament group to push the monofilament group radially; a step of welding the center part of the monofilament group into a ring shape while fixing the monofilament group pushed open on the base; cutting the inner side of the welding part to form a sheet-shaped brush single body which is provided with a jack at the center and radially extends a plurality of monofilaments from the jack; inserting and holding a shaft tube into the insertion hole of the brush unit; taking out the brush units from the pedestal together with the core tube; by repeating these steps, a plurality of brush units are inserted into the axial tube and held, thereby forming a roller-shaped rotating brush in which a plurality of monofilaments radially protrude.

Thus, a rotary brush of a rolling toothbrush having a uniform bristle density and excellent plaque removal and gum massaging effects can be obtained continuously, efficiently and at low cost.

In the above manufacturing method, it is preferable to finish the bristles of the rotary brush by aligning the tips of the bristles. By performing such a treatment, a more preferable rotating brush can be obtained.

The invention according to claim 4 is a device for manufacturing a brush unit of a rotating brush, the device comprising: the device comprises a pedestal, a chuck, a conical bobbin, a pressing body, a deposition machine and a cutting machine, wherein the pedestal is provided with an insertion hole for allowing a monofilament group to pass through, and the monofilament group is formed by gathering a plurality of monofilaments into a bundle shape; the chuck is used for grabbing the monofilament group and keeping the monofilament group to protrude out of the insertion hole of the pedestal by a certain amount; the cone-shaped bobbin is used for inserting the center of the protruding end of the monofilament group and pushing the monofilament group away in the radial direction; the pressing body is used for fixing the pushed monofilament group on the pedestal; a welding machine for welding a central portion of the filament group into a ring shape in a state where the filament group is fixed to the base; the cutter is used for cutting the inner side of the deposited part of the monofilament group.

The manufacturing device of the rotary brush according to claim 5 of the present invention includes: a pedestal, a chuck, a tapered bobbin, a pressing body, a deposition machine, a cutting machine, and a tube erecting machine (パイプハンド), wherein the pedestal is provided with an insertion hole for passing a monofilament group formed by gathering a plurality of monofilaments into a bundle; the chuck is used for grabbing the monofilament group and keeping the monofilament group to protrude out of the insertion hole of the pedestal by a certain amount; the cone-shaped bobbin is used for inserting the center of the protruding end of the monofilament group and pushing the monofilament group away in the radial direction; the pressing body is used for fixing the pushed monofilament group on the pedestal; a welding machine for welding a central portion of the filament group into a ring shape in a state where the filament group is fixed to the base; a cutter for cutting the inside of the monofilament group while leaving a welded portion of the monofilament group, thereby forming a single sheet-like brush body having an insertion hole at the center thereof and a plurality of bristles (monofilaments) projecting from the insertion hole in the radial direction; the shaft center pipe is inserted into the insertion hole of the brush unit and is held, and after the shaft center pipe is inserted and held, the brush unit is taken out together with the shaft center pipe from the pedestal.

By using this apparatus, the method of the present invention can be easily carried out to achieve the desired object.

In the above apparatus, it is preferable to provide a cutting blade for cutting the tips of the bristles while rotating the rotary brush, and a finishing machine for rounding the tips of the bristles. Thus, a more excellent rotating brush can be obtained.

The invention described in claim 7 is a sheet-like brush unit for a rolling toothbrush, which is a brush unit for forming a rotary toothbrush by overlapping a plurality of sheets,

the sheet-shaped brush unit for the rolling toothbrush is formed by a monofilament group and an insertion hole, wherein the monofilament group is formed by gathering a plurality of monofilaments into a bundle shape and pushing the monofilaments in a radial direction; the insertion hole is formed by welding the center portion of the monofilament group into a ring shape to form a welded portion and cutting the inner periphery of the ring-shaped welded portion into a circular shape in a state where the monofilament group pushed open is fixed to the base.

The invention described in claim 8 is a rotary brush for a rolling toothbrush, which is formed by stacking a plurality of sheet-like brush units and inserting an axial core tube into an insertion hole, wherein the sheet-like brush units are formed by forming a monofilament group and a circular insertion hole, the monofilament group is formed by gathering a plurality of monofilaments into a bundle and pushing the monofilaments radially outward; the circular insertion hole is formed by welding the center portion of the monofilament group into a ring shape to form a welded portion and cutting the inner periphery of the ring-shaped welded portion into a circular shape in a state where the monofilament group pushed open is fixed to the base.

The invention described in claim 9 is a rolling toothbrush in which a plurality of sheet-like brush units for a rolling toothbrush are stacked, and an axial core pipe is inserted into an insertion hole to form a rotating brush rotatably supported by a handle, wherein the sheet-like brush units for a rolling toothbrush are formed by forming a monofilament group in which a plurality of monofilaments are gathered into a bundle and pushing the monofilaments in a radial direction and a circular insertion hole; the circular insertion hole is formed by welding the center portion of the monofilament group into a ring shape to form a welded portion and cutting the inner periphery of the ring-shaped welded portion into a circular shape in a state where the monofilament group pushed open is fixed to the base.

The invention described in claim 10 is a method for manufacturing a rolling toothbrush, comprising: a monofilament group formed by gathering a plurality of monofilaments into a bundle shape, the monofilament group extending outward by a certain amount from an insertion hole provided in a pedestal; inserting a cone-shaped bobbin into the center of the protruding end of the monofilament group, and pushing the monofilament group in the radial direction; welding the central part of the monofilament group into a ring shape under the state that the monofilament group which is pushed away is fixed on the pedestal; cutting the inner side of the annular welding part to form a sheet-shaped brush single body, wherein the sheet-shaped brush single body is provided with an insertion hole at the center, and a plurality of bristles (monofilaments) radially extend from the insertion hole; inserting and holding a shaft core tube into the insertion hole of the brush unit; taking the brush single bodies out of the pedestal together with the core tube; repeating these steps, inserting and holding a plurality of brush units into the axial center tube, thereby forming a roller-shaped rotating brush with a plurality of bristles radially protruding; the rotating brush is rotatably supported by the handle.

In addition, a method of manufacturing a rotary toothbrush according to the present invention is a method of manufacturing a rotary toothbrush in which a plurality of brushes are individually stacked to form a rotary brush, and the rotary brush is rotatably attached to a handle, wherein a monofilament group formed by a plurality of monofilaments being gathered into a bundle shape is projected outward by a predetermined amount from an insertion hole provided in a base, air is blown into a center of a projecting end of the monofilament group to open the monofilament group in a radial direction, the center portion of the monofilament group is welded in a state where the opened monofilament group is fixed to the base, then the center portion of the welded center portion is cut off to form a brush individual, and after a plurality of the brush individual is stacked on the same center to form a rotary brush, the rotary brush is attached to the handle.

The method for manufacturing a brush unit of a rotary brush according to the present invention is a method for manufacturing a brush unit of a rotary brush by overlapping a plurality of brush units, and is characterized by comprising a 1 st step of forming a monofilament group by gathering a plurality of monofilaments into a bundle, the monofilament group protruding outward by a predetermined amount from an insertion hole provided in a pedestal; the 2 nd step of blowing air into the center of the projected side of the monofilament group to open the monofilament group in the radial direction; the 3 rd step is to weld the center part of the monofilament group in a state that the opened monofilament group is fixed on the base; the 4 th step cuts off the central part of the welded central part.

In the above method, the respective steps can be performed in a single step, and a single brush having a uniform thickness can be manufactured without requiring a highly skilled technique. By opening the monofilament group in the radial direction using air from the nozzle, the overlapping phenomenon of the monofilaments constituting the brush unit is almost eliminated, and the brush unit having a uniform thickness can be manufactured. In the case of increasing the manufacturing speed of the brush unit, the monofilaments are less likely to be damaged, and therefore, the monofilaments can be opened at a high speed, and efficient manufacturing can be achieved in accordance with the high speed of the brush unit. Since the central portion of the monofilament group opened in the radial direction is cut off after welding the central portion of the welded central portion, the shape of the central portion can be uniformly finished, and uniform brush units can be manufactured. In addition, the step of opening the monofilament group in the radial direction can be performed by the same member by blowing air into the central portion of the projecting end of the monofilament group, so that the device and the handling system can be simplified. Also, quality equalization and mass production of the rotary toothbrush can thereby be achieved.

The apparatus for manufacturing a brush unit of a rotary brush according to the present invention is an apparatus for manufacturing a brush unit of a rotary brush by overlapping a plurality of sheets, and includes a base provided with an insertion hole for passing a monofilament group formed by gathering a plurality of monofilaments into a bundle, a chuck, a nozzle, a pressing body, a welding machine, and a cutting device; the chuck is used for grabbing the monofilament group and keeping the monofilament group to protrude out of the insertion hole of the pedestal by a certain amount; the nozzle blows air to the center of the protruding end of the monofilament group, and the monofilament group is opened in the radial direction; the pressing body is used for fixing the pushed monofilament group on the pedestal; a welding machine for welding a central portion of the monofilament group in a state where the monofilament group is fixed to the base; the cutting device is used for cutting off the central part of a welding part formed by the welding machine.

By using this apparatus, the method of the present invention can be easily carried out to achieve the desired object.

In the above apparatus, the chuck is preferably formed of a housing and a tubular elastic member disposed inside the housing, and the elastic member is expanded and contracted by supplying exhaust air into the housing, or the monofilament group inserted into the housing is caught or released. In this way, the structure of the chuck can be simplified, and the operation of projecting the monofilament group outward from the insertion hole of the base can be performed easily and reliably, and this operation can be performed easily and reliably by one chuck.

Preferably, the nozzle is provided with an air passage for blowing air into a central portion of the projecting end of the monofilament group in the nozzle, and the cutting means is formed on the outer periphery of the leading end, and functions of both ejecting air and cutting the central portion of the deposited portion are performed by one member. With this configuration, the entire configuration of the apparatus can be simplified, and the movement operation system of the nozzle and the cutting apparatus can be simplified. That is, in the case of using the push-off member of the monofilament group, the welding machine, and the cutting machine, the entire apparatus becomes complicated, and the movement operation system becomes complicated because it is necessary to independently move the 3 machines, respectively. Further, in the above-described embodiment, the nozzle and the cutting device are integrally formed as a single module, and therefore, if only both the module and the welding machine are moved, the moving operation system can be simplified.

Further, it is preferable that the nozzle and the welding machine are attached to a single frame, and are moved in the left-right and up-down directions via the single frame. With this configuration, the entire configuration of the apparatus can be simplified, and the movement operation system of the nozzle and the welding machine can also be simplified.

Preferably, the base is provided with a slide blade for cutting and removing the residual part of the monofilament group cut by the cutting device from the monofilament group in the next stage, and the slide blade is provided with an inclined surface for applying a force in a direction of pulling out the residual part of the monofilament group from the base. In this way, when the welding residue of the monofilament group is cut by the slide blade and removed, a force in the direction of pulling out the welding residue from the base is applied to the welding residue of the monofilament group by the inclined surface provided on the slide blade, and the welding residue of the monofilament group is not attached to and remains on the base, and can be more quickly taken out to the outside by the slide blade. This allows the following filament group of the welding residue to be reliably inserted into the insertion hole of the pedestal, and the transfer to the next step can be performed quickly.

Drawings

Fig. 1 is a sectional view showing a main part of a manufacturing apparatus for manufacturing a rotary brush by the manufacturing method of the present invention.

FIG. 2 is a sectional view showing a step of pushing the monofilament masses apart by a tapered bobbin.

FIG. 3 is a sectional view showing a process of pushing the bobbin by a tapered bobbin and pressing the bobbin by a pressing body.

FIG. 4 is a cross-sectional view showing a welding process by a welding machine with pressing by a pressing body

Fig. 5 is a sectional view showing a process of cutting the inside of the welded portion.

Fig. 6 is a sectional view showing a step of drawing in the brush unit 8 toward the axial tube 9 and holding the brush unit.

Fig. 7 is a sectional view showing a step of drawing in the brush unit 8 toward the axial tube 9 and holding the brush unit.

Fig. 8 is a sectional view showing a step of inserting and holding a predetermined number of brush units 8 into the axial tube 9.

Fig. 9 is a sectional view of the rotary brush in which a predetermined number of brush units 8 are inserted into the axial tube 9 and held.

Fig. 10 is a top view of an apparatus used in post-treating a rotating brush.

Fig. 11 is a side view showing the main part thereof unfolded.

Fig. 12 is a perspective view showing a rolling toothbrush to which a rotary brush is attached.

Fig. 13 is a partial sectional view for explaining a state in which a rolling toothbrush is manufactured by attaching a rotary brush to a handle.

Fig. 14 is a partial sectional view for explaining a state where the rotary brush is attached to the handle to manufacture a rolling toothbrush.

Fig. 15 is a partially cut-away front view showing a manufacturing apparatus of a brush unit of a rotary brush according to the present invention.

Fig. 16 is a perspective view showing a main part of the same manufacturing apparatus, with a pedestal partially exploded.

Fig. 17 is a sectional view showing a step 1 in the production of a rotary brush by the production method of the present invention.

Fig. 18 is a sectional view showing a part of the 2 nd step.

Fig. 19 is a sectional view showing a part of the 2 nd step.

Fig. 20 is a sectional view showing a part of the 3 rd step.

Fig. 21 is a sectional view showing a part of the 3 rd step.

FIG. 22 is a sectional view showing the 4 th step.

Fig. 23 is a sectional view showing a step of taking out a cut portion of the monofilament group after the 4 th step.

Fig. 24 is a sectional view showing a part of a process for taking out the finished brush unit to the outside.

Fig. 25 is a sectional view similarly showing a part of a process when the brush unit is taken out to the outside.

Fig. 26 is a sectional view showing a process of inserting and holding the brush unit into the axial tube.

Fig. 27 is a sectional view of the obtained rotary brush.

Fig. 28 is a plan view of the apparatus for post-treating the rotating brush.

Fig. 29 is a side view showing a state where a main part is developed.

FIG. 30 is a perspective view showing a rolling toothbrush to which a rotary brush is attached.

Fig. 31 is a sectional view illustrating a state in which the rotary brush is attached to the rolling toothbrush.

Fig. 32 is a sectional view showing a state after mounting.

Detailed Description

Embodiment 1 of the present invention is explained below with reference to the drawings.

Fig. 1 to 9 show respective steps in manufacturing a rotary brush according to the manufacturing method of the present invention. Fig. 1 shows a main part of a manufacturing apparatus for carrying out the same method. That is, the device comprises a base 2, 1 st and 2 nd chucks 31 and 32 of the upper and lower groups 1, a tapered bobbin 4, and a tubular pressing body 5, wherein the base 2 is provided with an insertion hole 2a for passing the monofilament group 1; the 1 st and 2 nd chucks 31 and 32 are provided on the lower side of the stand 2 to be movable up and down for grasping or releasing the monofilament group 1; the cone-shaped bobbin 4 is arranged above the insertion hole 2a of the pedestal 2, is used for inserting the center of the inserted upper side of the monofilament group 1 and pushing the monofilament group 1 in the radial direction, and the monofilament group 1 is clamped by the chucks 31 and 32 and upwards extends out of the insertion hole 2a of the pedestal 2 by a certain amount through the upward movement of the chucks 31 and 32; the tubular hold-down body 5 is similarly provided above the base 2, and fixes the monofilament group 2 pushed open to the base 2.

Further, a welding machine 6, a cutting machine 7, and a pipe erecting machine 10 are provided above the base 2, the welding machine 6 being for welding a central portion of the monofilament group 1 in a state where the monofilament group 1 is fixed to the base 2, and being, for example, an ultrasonic welding machine 6; the cutter 7 cuts the inside of the monofilament group 1 while leaving at least a part of the deposited part thereof; a brush unit 8 is inserted into a shaft center tube 9, the brush unit 8 is formed of a monofilament group 1 passing through a deposition machine 6 and a cutter 7, a plurality of brush units are inserted into the shaft center tube and held, and after the insertion and holding, the brush unit 8 and the shaft center tube 9 are taken out together from a pedestal 2 by a riser machine 10. The riser 10 is constituted by: the brush units 8 are removed when a predetermined number of the brush units are inserted and held in the shaft tubes 9, and one shaft tube 9 is sequentially removed from a not-shown bracket in which a plurality of shaft tubes 9 are accommodated, and attached to the vertical tube machine 10.

The welding machine 6, the cutting machine 7, and the riser machine 10 are shown as being separated from each other in the left-right direction from above the monofilament group 1 in fig. 1, but are moved to above the monofilament group 1 by a horizontal moving device to perform processing at the time of processing. Conversely, the pedestal may be moved in the horizontal direction.

First, as shown in fig. 1, the monofilament group 1 is held by the 1 st and 2 nd chucks 31 and 32, and the monofilament group 1 is held in a state in which the monofilament group 1 is extended upward by a predetermined amount from the insertion hole 2a of the base 2 by upward movement of the chucks 31 and 32, and the monofilament group 1 is formed by gathering the monofilament threads 1a made of thermoplastic resin such as nylon into a bundle. The operation of the chucks 31 and 32 will be described in detail later.

Next, as shown in fig. 2, the conical bobbin 4 is lowered, and the conical projection 4a at the lower end thereof is inserted into the center of the projecting upper end of the monofilament group 1, thereby pushing the monofilament group 1 radially. Next, as shown in fig. 3, the pressing body 5 is lowered, and the monofilament group 1 is fixed to the base 2 in a state pushed open.

The pressure body 5 has a cylindrical lower end surface, for example. The pressing body 5 presses the center of the monofilament group 1 pushed in the radial direction slightly outside. In a state of being pressed by the pressing body 5, the tapered bobbin 4 having a downward conical protrusion is retreated, and the deposition machine 6 can be inserted. A space for allowing the tip of the welding machine to enter is provided inside the pressing body 5. The pressing body 5 is held stably between the base 2 and the monofilament group.

Then, as shown in fig. 4, the tapered bobbin 4 is retracted in a state where the monofilament group 1 pushed aside is fixed to the base 2 by the pressing body 5. Next, the welding machine 6 moves to a position directly above the center of the filament group 1 and extends into the pressing body 5, and the periphery of the center portion of the filament group 1 pushed open is welded into a ring shape by the tip of the welding machine 6.

The welding machine is suitable for use with ultrasonic waves and has a circular welding tool 6a at its tip. The monofilament group 1 pushed open is pressed and welded to the base 2 inside the pressing body 5. The inner periphery of the welded part 81 obtained by the welding machine 6 preferably corresponds to the upper end circumferential edge 2b of the insertion hole 2 a.

After welding, as shown in fig. 5, the welding machine 6 is moved backward, and then the cutter 7 is moved to a position directly above the center of the monofilament group 1 and is inserted into the inside of the pressing body 5, and the inner peripheral portion 81a of the welded portion 81 of the monofilament group 1 pushed out is cut in a circular shape by the tip of the cutter 7

In the cutter 7 of the illustrated embodiment, the outer peripheral surface of the tip is formed as a truncated conical surface 7a inclined with respect to the center line, and the monofilament group is cut between the truncated conical surface 7a and the upper end peripheral edge 2b of the circular insertion hole 2a of the base 2 while being sandwiched therebetween. By sandwiching and cutting between the truncated conical surface 7a and the upper end circumferential edge 2b of the insertion hole 2a, a single brush having a uniform thickness can be manufactured and cutting can be continuously repeated. In order to allow the truncated conical surface 7a and the upper end circumferential edge 2b of the insertion hole 2a to be cut repeatedly more times, they are made of a material having a necessary hardness or the like. Or subjected to a desired heat treatment.

After the processing, the sheet-like brush element 8 is formed with an insertion hole (welded portion) 81 at the center, and a plurality of (bristle) monofilaments 82 (see fig. 6) radially protrude from the insertion hole 81 of the sheet-like brush element 8. The welding around the center portion of the monofilament group 1 by the welding machine 6 and the cutting of the inner portion of the welded portion by the cutting machine 7 may be performed in the reverse order. That is, the center portion of the monofilament group 1 may be cut into a circular shape by the cutter 7, and then the periphery thereof may be welded into a ring shape by the fusion-bonding machine 6.

In this way, the monofilament group 1 is welded annularly while being fixed to the base, and the inner side of the welded portion is cut while the monofilament group 1 is fixed to the base, so that the thickness of the welded portion 81 can be uniformly finished.

Then, the 1 st and 2 nd chucks 31 and 32 are lowered together with the monofilament group 1 gripped, and the monofilament group 1 is once retreated downward inside the insertion hole 2a as shown in fig. 6. Next, while holding the axial tube 9, the vertical tube machine 10 is moved to a position directly above the center of the insertion hole 81 of the brush unit 8 manufactured on the base 2, and as shown in fig. 7, the axial tube 9 is inserted from the insertion hole 81 to the insertion hole 2a of the base 2 by lowering the vertical tube machine 10, and the brush unit 8 is inserted into and held by the axial tube 9.

After the brush unit 8 is inserted and held in the axial tube 9, the stem erecting machine 10 is raised, the brush unit 8 is taken out outward from the pedestal 2 together with the axial tube 9, and the stem erecting machine 10 stands by at a predetermined upper position.

When the monofilament group 1 is once retreated downward in the insertion hole 2a, the 1 st chuck 31 is kept closed, and the 2 nd chuck 32 is opened and moved downward, and is moved downward by a predetermined amount, and then closed to grasp the monofilament group 1 again. Then, the 1 st chuck 31 is opened, and the 2 nd chuck 32 is raised to a predetermined position. After the first chuck 31 is closed after the first chuck has been raised to a predetermined position, the chucks 31 and 32 are raised together after the completion of these operations, and the monofilament group 1 held by the chucks is held by projecting a predetermined amount upward from the insertion hole 2a of the base 2. By doing so, the monofilament group 1 is prevented from falling downward, and the monofilament group 1 can be held by projecting upward a certain amount from the insertion hole 2a of the base 2.

The respective steps are repeated, and as shown in fig. 8, the brush units 8 are sequentially inserted into the axial tube 9 and held. After a predetermined number of brush units 8 are inserted and held in the axial tube 9, the axial tube 9 and the brush units 8 are removed from the riser 10, and a new axial tube 9 is removed from the bracket and attached to the riser 10. As shown in fig. 9, after being removed from the stem pipe machine 10, the brush unit 8 is fixed to the axial pipe 9. In the embodiment shown in the figures, a shaft center tube 9 made of thermoplastic resin such as nylon is used, a flange 91 is integrally formed at one end in the longitudinal direction of the shaft center tube 9, an annular insertion groove 92 is provided at the other end, and the brush units 8 are inserted in order from the insertion groove 92 side with the flange 91 positioned above. After a predetermined number of brush units 8 are inserted and held, a cylindrical cover 94 is used, the cover 94 has an insertion portion 93 that is inserted into the insertion groove 92 and is made of the same material as the shaft tube 9, the insertion portion 93 is inserted into the insertion groove 92, the cover 94 is joined to the shaft tube 9 by ultrasonic sealing means or the like, and the predetermined number of brush units 8 are fixed to the shaft tube 9, thereby forming the rotary brush 11.

Fig. 10 is a plan view of an apparatus used for the post-treatment of the above rotary brush 11, and fig. 11 is a side view showing a main part thereof being developed. In the same figures, a plurality of pins 14 into which the axial tubes 9 of the rotating brushes 11 are inserted are projected from the outer peripheral portion of the upper surface of a rotating table 13 rotationally driven in the direction of arrow R by a motor 12, and a rubber roller 15 and a cutter 16 such as a pusher are disposed at the outer peripheral position of the rotating table 13, and the rubber roller 15 is in contact with the rotating brushes 11 into which the pins 14 are inserted. The rotating brush 11 with the pin 14 inserted therein is rotated by the rubber roller 15, and the cutting blade 16 cuts the tips of the bristles 82 of the rotating brush 11.

Further, two finishing processors 17 such as grinders are disposed at the front and rear positions behind the cutting blade 16 of the rotary table 13 in the rotation direction, the grinders being in contact with the tips of the bristles 82 of the rotary brush 11 inserted into the pin 14. The tips of the bristles 82 of the rotary brush 11 are ground by rotating the finishing machine 17 in the forward and reverse directions.

In the embodiment shown in the figures, a drop-off preventing tool 18 for the rotary brush 11 is disposed above the finishing machine 17, and a take-out device 19 for taking out the finished rotary brush 11 from the pin 14 is disposed at a position rearward of the rotary table 13 in the rotation direction of the finishing machine 17. In fig. 11, 20 is a sensor for confirming that the rotary brush 11 is mounted on the pin 14 and driving the finishing processor 17; reference numeral 21 denotes a sensor for confirming that the rotary brush 11 is taken out from the pin 14 by the take-out device 19. In fig. 10, L indicates a range in which the rotary brush 11 is attached to the pin 14 on the rotary table 13.

Fig. 12 is a perspective view showing the rolling toothbrush 22 with the rotating brush 11 attached thereto, obtained in the above manner. The toothbrush 22 is formed by rotatably supporting the rotary brush 11 at one end in the longitudinal direction of a handle member 23 via a support shaft 24.

Fig. 13 and 14 are sectional views illustrating a state in which the rotary brush 11 obtained as described above is attached to the handle member 23 of the rolling toothbrush 22. First, as shown in fig. 13, the rotary brush 11 is placed between the support pieces 23a, 23a on both sides, the support pieces 23a, 23a are formed at one end in the longitudinal direction of the handle member 23, and then, a support shaft 24 with a head 24a is inserted from one support piece 23a to the other support piece 23a through the axial tube 9 of the rotary brush 11, and then, the other end of the support shaft 24 is crushed, so that the rotary brush 11 is rotatably supported on the handle member 23 via the support shaft 24.

In the embodiment of each figure, recesses 23b, 23b are formed in the respective support pieces 23a of the shaft member 23, and the head 24a of the support shaft 24 and the other end of the support shaft 24 are respectively located therein. The head 24a of the support shaft 24 is formed in a non-circular shape, and the recess 23b for accommodating the support piece 23a of the head 24 is also preferably formed in a non-circular shape, so that the rotating brush 11 can be smoothly rotated about the support shaft 24.

Next, another embodiment of the present invention will be explained.

Fig. 15 is a partially cut-away front view of a device for manufacturing a brush unit for a rotary brush of a rotary toothbrush according to the present invention. The apparatus comprises a base 52 and a chuck 53, wherein the base 52 is provided with an insertion hole 52a for passing a monofilament group 51, and the monofilament group 51 is made by assembling and bundling monofilaments 51a made of thermoplastic resin such as nylon; the chucks 53 are used to grasp the released monofilament bundles 51.

Above the base 52, there are provided a nozzle 54, a pressing body 55, a welding machine 56, and a cutting device 57. The nozzle 54 is configured to blow air into the center of the upper end of the insertion portion of the filament group 51, and to open the filament group 51 in the radial direction, the insertion portion of the filament group 51 being held by the chuck 53 and protruding upward by a predetermined amount from the insertion hole 52a of the base 52 by the upward movement of the chuck; the pressing body 55 is used for fixing the opened monofilament group 51 on the pedestal 52; the welding machine 56 is for welding the center portion of the filament group 51 in a state where the filament group 51 is fixed to the base 52 by the pressing body 55, and is, for example, an ultrasonic welding machine; the cutting device 57 cuts the center portion of the monofilament group 51 while leaving at least a part of the deposited portion.

The cartridge 53 has a housing 531 and an elastic member 532, the housing 531 being provided with an air supply and discharge duct 530 connected to 540; the elastic member 532 is disposed inside the housing, has flanges at the upper and lower sides, is cylindrical, and is made of rubber or the like. Inside the housing 531, the elastic member 532 is expanded and contracted by supplying the discharge air from the duct 530, thereby gripping or releasing the monofilament group 51 inserted through the inside of the chuck 53. Further, in a state where the monofilament group 51 is gripped by the elastic member 532, the chuck 53 is moved upward, so that the monofilament group 51 is projected upward by a predetermined amount from the insertion hole 52a of the base 52, and after the projection by the predetermined amount, the monofilament group 51 is opened in the radial direction by the air from the nozzle 54, the opened monofilament group 51 is fixed to the base 52 by the presser 55, and then the monofilament group 51 is released, and the chuck 53 is returned to the original lower position. With this configuration, the structure of the chuck 53 can be simplified by using only one chuck, and the operation of projecting the monofilament group 51 outward from the insertion hole 52a of the base 52 can be performed easily and reliably.

The nozzle 54 has an air passage 541 connected to the compressor 540 formed therein, and opens the filament group 51 in a radial direction by blowing air from the air passage 541 toward a central portion of a projecting end of the filament group 51. The cutting means 57 is integrally formed by an outer peripheral portion of the nozzle 54. That is, the tip end side of the nozzle 54 is formed into the cylindrical projecting portion 542, and the tip end outer peripheral portion is subjected to a treatment such as quenching, whereby the tip end outer peripheral portion of the projecting portion 542 is formed into the cutting device 57. With this configuration, the entire configuration of the apparatus can be simplified, and the movement operation system of the nozzle 54 and the cutting device 57 can be simplified.

In the embodiment of fig. 15, the nozzle 54 and the welding machine 56 provided with the cutting device 57 are mounted on a 1 st frame 571 that moves in the lateral direction, the first frame 571 is supported by a lateral groove 572a so as to be movable in the lateral direction, and the 2 nd frame 572 is supported by a vertical groove 573a so as to be movable in the 2 nd-element direction of the lateral direction, the vertical direction, and the lateral groove 572a is formed in the 2 nd frame 572 that moves in the same direction as the frame 1; the vertical groove 573a is formed in the 3 rd frame 573 that moves in the vertical direction. With this configuration, the entire structure of the apparatus is simplified, and the movement operation system of the nozzle 54 and the cladding machine 56 is also simplified. That is, since the nozzle 54 and the cutting device 57 are integrally formed as one module as described above, if only the module and the welding machine 56 are moved and operated in the 2-dimensional direction between the left and right limit positions 572b and 572c, the case becomes simple, and therefore, the moving operation system can be simplified.

Fig. 16 is a perspective view showing a main part of the manufacturing apparatus and the pedestal 52 in an exploded manner. The base 52 is composed of a disk-shaped 1 st member 521 and a disk-shaped 2 nd member 522, and the disk-shaped 1 st member 521 is fixed to the fixed base 520 (see fig. 15) by a plurality of bolts B1; the disk-shaped 2 nd member 522 is fixed to the upper portion of the 1 st member 521 by a plurality of bolts B2, and insertion holes 52a for passing the monofilament groups 51 are formed in the center portions of the 1 st and 2 nd members 521 and 522.

A slide groove 523 extending in the through diameter direction through the center portion thereof is formed on the upper surface of the member 1, and a slide blade 58 is attached to the slide groove 523, the slide blade 58 cutting and removing a residual welding portion 51a (see fig. 23) of the monofilament group 51 cut by the cutting device 57, and the residual welding portion 51a is formed on the nozzle 54. A sloped surface 580 extending rearward at an upward slope from the cutting edge is formed at the tip end of the slide blade 58, and a force is applied in a direction in which the welding residue 51b (see fig. 23) of the monofilament group 51 is drawn out from the insertion hole 52a of the holder 52 by the sloped surface 580.

As shown in fig. 15, the insertion hole 52a formed in the 1 st member 521 has an inward edge portion 5211 formed at the upper end thereof, and has a lower inner diameter larger than the inner diameter of the inward edge portion 5211, a cylindrical body 533 is inserted into the large diameter portion 52b so as to be vertically movable, a coil spring 534 is attached between the cylindrical body 533 and the upper end of the large diameter portion 52b, and the cylindrical body 533 is provided to protrude upward at the center of the chuck 53. The tube 533 and the coil spring 534 have substantially the same inner diameter as the insertion hole 52a, and the filament group 51 is inserted from the inside of the tube 533 and the coil spring 534 and passes through the insertion hole 52a of the 1 st and 2 nd members 521 and 522.

With such a configuration, when the monofilament group 51 is projected upward from the insertion hole 52 via the chuck 53, the monofilament group 51 can be smoothly fed out without being caught by the insertion hole 52 a. That is, the filament group 51 is projected upward from the insertion hole 52a, radially opened by air from the nozzle 54, and welded by the welding machine 56 in a state of being fixed to the base 52 by the pressing body 55. Then, the welded portion of the monofilament group 51 is cut at least partially by the cutting device 57, and the cut portion at this time is pressed into the insertion hole 52a (see fig. 22). Although a part of the monofilament group 51 tends to expand radially outward inside the insertion hole 52a due to the cut-out portion, the monofilament is prevented from expanding radially outward by the tubular body 533 and the coil spring 534 as described above, and the monofilament group 51 is smoothly fed upward by the chuck 53 without being caught by the insertion hole 52 a. The length of the coil spring 534 is longer than the vertical length of the large diameter portion when the cylindrical body 533 is moved to the lowermost position. Therefore, the expansion of the monofilament can be prevented at any position when the cylinder moves up and down.

The pressing body 55 is composed of a cylindrical pressing body 551 and a support member 552, and the cylindrical pressing body 551 has an insertion hole 551a at the center thereof through which the nozzle 54 and the welding machine 56 are inserted; the support member 552 supports a portion of the pressing body 551 in a state of extending downward. The support member 552 is connected to an up-and-down moving mechanism, not shown, and by this up-and-down moving mechanism, the entire pressure body 55 moves up and down along a center line passing through the center of the insertion hole 52a of the base 52.

Fig. 17 to 23 show respective steps in manufacturing a brush unit of a rotary brush by the manufacturing method of the present invention.

First, as shown in fig. 17, air is supplied from the compressor 540 (fig. 15) into the housing 531 of the chuck 53, the monofilament group 51 is sandwiched by the inward expansion of the elastic member 532 therein, and then the chuck 53 is moved upward, whereby the monofilament group 51 is held in a state of protruding upward by a predetermined amount from the insertion hole 52a of the base 52 (step 1).

Next, when the 1 st frame 571 of fig. 15 moves laterally along the groove 572a of the 2 nd frame 572 and the nozzle 54 attached to the 1 st frame 571 moves to a position directly above the insertion hole 52a of the base 52, the 1 st frame 571 moves downward along the groove 573a of the 3 rd frame 573 along with the 2 nd frame 572, whereby the nozzle 54 is inserted into the insertion hole 551a of the pressing body 551 of the pressing body 55 as shown in fig. 18 and 19, and the air from the air passage 541 of the nozzle 54 blows in the center of the upper end of the monofilament group 51 protruding upward from the insertion hole 52a of the base 52 and opens the monofilament group 51 in the radial direction (2 nd step).

Then, the pressing body 55 moves downward. As a result, as shown in fig. 20, the monofilament group 51 is fixed to the base 52 by the presser 55 in an opened state. Then, the 1 st frame 571 moves upward along the groove 573a of the 3 rd frame 573, and the nozzle 54 moves backward upward. In the above state of fig. 17 to 19, the chuck 53 is located at the upward moving position. As shown in fig. 20, when the filament group 51 is fixed to the base 52 in a state where the pressing body 55 is opened, air in the housing 531 of the chuck 53 is discharged, the elastic member 532 in the chuck 53 is loosened to release the filament group 51, and the chuck 53 returns to the original lower position in this state.

Next, the 1 st frame 571 of fig. 15 is moved laterally along the groove 572a of the 2 nd frame 572 to a position in contact with the right limit position, the nozzle 54 is moved to the broken line position of fig. 15 away from the base 52, the welding machine 56 is moved to a position directly above the monofilament group 51 of the base 52, and at this position, the 1 st frame 571 is moved downward again along the groove 573a of the 3 rd frame 573 along with the 2 nd frame 572. Thus, as shown in fig. 21, in a state where the opened filament group 51 is fixed to the base 52 by the pressing body 55, the welding machine 56 passes through the inside of the pressing body 551 of the pressing body 55 and is lowered to a position directly above the center of the filament group 51, and the peripheral region of the center portion of the opened filament group 51 is welded by the tip of the welding machine 56 (step 3). A high frequency welding machine is used for welding a circular range slightly larger than the diameter of the insertion hole 52 a.

After welding, the welding machine 56 is retracted upward from the base 52 and the pressing body 55 by the upward movement of the 1 st frame 571, returned to the original position, and further moved laterally, the nozzle 54 is moved to a position directly above the insertion hole 52a of the base 52, and at this position, the 2 nd frame 572 is moved downward along the groove 573a of the 3 rd frame 573 in association with the 1 st frame 571. As a result, as shown in fig. 22, the tip of the nozzle 54 is partially inserted into the insertion hole 52a provided in the 2 nd member 522 of the base 52 while passing through the inside of the insertion hole 551a of the presser body 55, and then the center portion of the welding portion of the opened monofilament group 51 is cut off by the cutting device 57 formed at the tip of the nozzle 54 and the upper end of the insertion hole 52a (step 4). An annular welded part 591 is left at the center of the opened monofilament group 51.

Then, the nozzle 54 is moved back upward by the 2 nd frame 572, so that a sheet-like brush unit 59 having an insertion hole (welded portion) 591 at the center and having a plurality of monofilaments 592 radially projecting from the insertion hole 591 is formed on the base 52, and the brush unit 59 is taken out to the outside by the standpipe 510 as described later.

As shown in fig. 22, when the cutting device 57 of the nozzle 54 cuts the central portion of the welding portion of the monofilament group 51 into a circular shape, the cutting device 57 partially protrudes into the insertion hole 52a of the 2 nd member 522 formed in the base 52, so that the cut portion 51b of the monofilament group 51 is pushed into the insertion hole 52a of the 2 nd member 522 and remains inside. Therefore, in the next step, the cut-out portion 51b is taken out from the monofilament group 51.

That is, as shown in fig. 23, the slide blade 58 moves in and out along the slide groove 523 to cut off the lower position of the cut-out portion 51 b.

Then, the slide blade 58 is retracted, and then, as shown by the broken line in fig. 23, the monofilament group 51 is moved upward from the insertion hole 52a of the base 52 shown in fig. 17 along with the cut-off portion 51b by a certain amount by the chuck 53, and the cut-off portion 51b is eliminated.

At this time, the cut-off portion 51b of the monofilament group 51 to be welded is formed with an inclined surface 580 extending rearward at an upward inclination from the cutting edge at the front end of the slide blade 58 with respect to the inside of the insertion hole 52a to be easily adhered and left on the base 52, and a force is applied in a direction in which the residual portion 51a of the monofilament group 51 to be welded is pulled out from the insertion hole 52a of the base 52 by the inclined surface 580, so that even if the cut-off portion 51b of the monofilament group 51 is adhered to the inside of the insertion hole 52a, the adhered state can be released by being lifted upward by the slide blade 58.

The elastic member 532 in the chuck 53 is expanded by air and clamps the filament group 51, and in this state, the filament group 511 is moved upward from the insertion hole 52a of the base 52 and also upward including the cut-out portion 51b by the rise of the chuck 53, and is rapidly taken out. This allows the monofilament group 51 following the cut-out portion 51b to be inserted through the insertion hole 52a of the base 52, and can be quickly transferred to the next step.

After the nozzle 54 is retracted upward from the state shown in fig. 22, as shown in fig. 24, the stem pipe 510 disposed near the base 52 is moved to a position directly above the insertion hole 591 of the brush unit 59 manufactured on the base 52 while holding the axial core 511. As shown in fig. 25, by lowering the pipe erecting machine 510, the shaft core pipe 511 is inserted into the insertion hole 52a of the base 52 through the insertion hole 591, and the brush unit 59 is inserted and held in the shaft core pipe 511.

After the brush unit 59 is inserted into the axial tube 511 and held, the vertical tube machine 510 is raised, the brush unit 59 is taken out from the base 52 together with the axial tube 511, and the vertical tube machine 510 stands by at a predetermined position above. Then, the steps shown in fig. 17 to 23 are repeated, and as shown in fig. 26, the brush units 59 are sequentially inserted into and held by the axial tube 511.

After a predetermined number of brush units 59 are inserted and held in the axial tube 511, the axial tube 511 and the brush units 59 are removed from the riser 510, and a new axial tube 59 is removed from the bracket and attached to the riser 510.

Further, after the axial pipe 511 is removed from the riser 510, as shown in fig. 27, the brush unit 59 is fixed to the axial pipe 511. In the illustrated embodiment, a shaft center pipe 511 made of a thermoplastic resin such as nylon is used, a flange 511a is integrally formed at one end in the longitudinal direction of the shaft center pipe 511, an annular insertion groove 511b is provided at the other end, and the brush units 59 are inserted in order from the insertion groove 511b side with the flange 511 positioned above. After a predetermined number of brush units 59 are inserted and held, a cylindrical cover 511d is used, the cover 511d has a protrusion 511c that can be inserted into the insertion groove 511b and is made of the same material as the axial tube 511, the protrusion 511c is inserted into the insertion groove 511b, the cover 511d is joined to the axial tube 511 by ultrasonic sealing means or the like, and a predetermined number of brush units 59 are fixed to the axial tube 511, thereby forming the rotary brush 512.

Fig. 28 is a plan view of an apparatus used for the post-treatment of the above rotary brush 512, and fig. 29 is a side view showing a main part thereof being developed. In each figure, a plurality of pins 515 into which the axial tubes 511 of the rotating brushes 512 are inserted are projected from the outer peripheral portion of the upper surface of a rotating table 514 which is rotationally driven in the direction of the arrow by a motor 513, and a rubber roller 516 and a cutter 517 such as a pusher are disposed at the outer peripheral position of the rotating table 514, and the rubber roller 516 is in contact with the rotating brush 512 into which the pins 515 are inserted. The rotating brush 512 inserted into the pin 515 is rotated by the rubber roller 516, and the leading end of the monofilament 592 of each brush unit 59 of the rotating brush 512 is cut by the cutting blade 517.

Further, at a position rearward in the rotation direction of the cutting blade 517 of the rotary table 514, finishing processors 518 such as two grinders that contact the tip ends of the monofilaments 592 of the rotary brush 512 inserted with the pins 515 are disposed forward and rearward. The leading ends of the monofilaments 592 of the rotating brush 512 are rounded by these finishing processors 518.

In the embodiment of fig. 29, a tool 519 for preventing the rotating brush 512 from falling off is disposed above the finishing machine 518, and a take-out machine 520 for taking out the finished rotating brush 512 from the pin 515 is disposed at a position rearward of the rotary table 514 in the rotation direction of the finishing machine 518. In the same figure, S1 is a sensor for confirming that the rotary brush 512 is mounted on the pin 515 and driving the finishing processor 518; s2 is a sensor for confirming that the rotating brush 512 is taken out from the pin 515 by the take-out machine 520. In fig. 28, L indicates a range in which the rotary brush 512 is attached to the pin 515 on the rotary table 514.

Fig. 30 is a perspective view showing a rolling toothbrush 560 mounted with a rotating brush 512 obtained in the above manner. The toothbrush 560 is formed by rotatably supporting the rotary brush 512 at one end in the longitudinal direction of a handle member 561 via a support shaft 562.

Fig. 31 and 32 are sectional views illustrating a state in which the rotary brush 512 obtained as described above is attached to the handle member 561 of the rolling toothbrush 560. First, as shown in fig. 31, the rotary brush 512 is inserted between the support pieces 561a, 561a on both sides, the support pieces 561a, 561a being formed at one end in the longitudinal direction of the handle member 561, then, from one support piece 561a, a support shaft 562 with a head 562a is inserted through the axial tube 511 of the rotary brush 512 into the other support piece 561a, and then, as shown in fig. 32, the other end of the support shaft 562 is crushed, and the rotary brush 512 is rotatably supported on the handle member 561 via the support shaft 562.

In the embodiment of each figure, a recess 561b, 561b is formed on each supporting piece 561a of the handle member 561, respectively, and a head portion 562a of the support shaft 562 and a crushed portion 562b of the other end are respectively located therein. The head 562a of the support shaft 562 is formed in a non-circular shape, and the recess 561b for accommodating the support piece 561a of the head 562a is also preferably formed in a non-circular shape, so that the rotating brush 512 can be smoothly rotated about the support shaft 562.

As described above, according to the present invention, it is possible to manufacture a brush unit having a uniform thickness, and it is possible to manufacture the brush unit without requiring a high level of skill, so that it is possible to perform mass production, and it is possible to manufacture a brush unit having few monofilaments overlapped with each other at a high speed and with high efficiency, and it is possible to realize quality equalization and mass production of a rotary toothbrush.

Claims (17)

1. A method for manufacturing a brush unit for forming a sheet-like brush unit having an insertion hole at the center thereof and a plurality of bristles radially protruding from the insertion hole, wherein a plurality of filaments are piled up to form a rotating brush, and a filament group formed by bunching a plurality of filaments is protruded to the outside by a predetermined amount from the insertion hole provided on a base; inserting a cone-shaped bobbin into the center of the protruding end of the monofilament group, and pushing the monofilament group in the radial direction; the center portion of the monofilament group is welded into a ring shape while the monofilament group pushed open is fixed to the base, and the inner side of the ring-shaped welded portion is cut.

2. A method for manufacturing a rotary brush is characterized in that a monofilament group formed by gathering a plurality of monofilaments into a bundle shape is protruded to the outside by a certain amount from an insertion hole provided on a pedestal; inserting a cone-shaped bobbin into the center of the protruding end of the monofilament group, and pushing the monofilament group in the radial direction; welding the central part of the monofilament group into a ring shape in a state that the monofilament group pushed away is fixed on the pedestal; cutting the inner side of the annular welding part to form a sheet-shaped brush unit with an insertion hole at the center and a plurality of bristles radially extending from the insertion hole; inserting and holding a shaft core tube into the insertion hole of the brush unit; taking the brush single bodies and the core tube out of the pedestal together; by repeating these steps, a plurality of brush units are inserted into the axial tube and held, and a roller-shaped rotating brush having a plurality of bristles radially projecting therefrom is formed.

3. A method of manufacturing a rotary brush according to claim 2, wherein the leading ends of the bristles of the rotary brush are cut and finished.

4. A brush monomer manufacturing installation of the rotary brush, characterized by that, have base, chuck, cone-shaped bobbin, body of the compacting, deposition machine, cut-off machine, there are insertion holes used for making monofilament group to pass on the said base, the said monofilament group is formed by gathering the multiple monofilaments into the bunch form; the chuck is used for grabbing the monofilament group and keeping the monofilament group to protrude out of the insertion hole of the pedestal by a certain amount; the cone-shaped bobbin is used for inserting the center of the protruding end of the monofilament group and pushing the monofilament group away in the radial direction; the pressing body is used for fixing the pushed monofilament group on the pedestal; a welding machine for welding a central portion of the filament group into a ring shape in a state where the filament group is fixed to the base; the cutter is used for cutting the inner side of the deposited part of the monofilament group.

5. A manufacturing device of a rotary brush is characterized by comprising a pedestal, a chuck, a conical bobbin, a pressing body, a deposition machine, a cutting machine and a vertical pipe machine, wherein the pedestal is provided with an insertion hole for enabling a monofilament group to pass through, and the monofilament group is formed by gathering a plurality of monofilaments into a bundle shape; the chuck is used for grabbing the monofilament group and keeping the monofilament group to protrude out of the insertion hole of the pedestal by a certain amount; the cone-shaped bobbin is used for inserting the center of the protruding end of the monofilament group and pushing the monofilament group away in the radial direction; the pressing body is used for fixing the pushed monofilament group on the pedestal; a welding machine for welding a central portion of the filament group into a ring shape in a state where the filament group is fixed to the base; a cutter for cutting the inner side of the monofilament group while leaving a welded portion of the monofilament group, thereby forming a sheet-like brush unit having an insertion hole at the center thereof and a plurality of bristles extending from the insertion hole in the radial direction; and inserting and holding the shaft center pipe into the insertion hole of the single brush body, wherein the shaft center pipe is used for taking out the single brush body together with the shaft center pipe from the pedestal to the outside after the shaft center pipe is inserted and held.

6. The manufacturing apparatus of a rotary brush according to claim 5, comprising a cutter for rotating the rotary brush and cutting the tips of the bristles of the rotary brush, and a finishing machine for rounding the tips of the monofilaments.

7. A sheet-like brush unit for a rolling toothbrush, which is a brush unit for forming a rotating toothbrush by overlapping a plurality of sheets, is characterized in that the sheet-like brush unit for a rolling toothbrush is formed by forming a monofilament group and a circular insertion hole, wherein the monofilament group is formed by gathering a plurality of monofilaments into a bundle shape and pushing the monofilaments in a radial direction; the insertion hole is formed by welding the center portion of the monofilament group into a ring shape to form a welded portion and cutting the inner periphery of the ring-shaped welded portion into a circular shape in a state where the monofilament group pushed open is fixed to the base.

8. A rotary brush for a rolling toothbrush, wherein a plurality of sheet-like brush units for a rolling toothbrush are formed by stacking the sheet-like brush units and inserting an axial tube into an insertion hole; the sheet-shaped brush unit for the rolling toothbrush is formed by forming a monofilament group and a circular insertion hole, wherein the monofilament group is formed by gathering a plurality of monofilaments into a bundle shape and pushing the monofilaments in a radial direction; the circular insertion hole is formed by welding the center portion of the monofilament group into a ring shape to form a welded portion and cutting the inner periphery of the ring-shaped welded portion into a circular shape in a state where the monofilament group pushed open is fixed to the base.

9. A rolling toothbrush, characterized in that a sheet-shaped brush unit for a rolling toothbrush is formed, a plurality of the sheet-shaped brush units are overlapped, and an axial tube is inserted into an insertion hole to form a rotating brush, and the rotating brush is rotatably supported on a handle part; the sheet-shaped brush unit for the rolling toothbrush is formed by forming a monofilament group and a circular insertion hole, wherein the monofilament group is formed by gathering a plurality of monofilaments into a bundle shape and pushing the monofilaments in a radial direction; the circular insertion hole is formed by welding the center portion of the monofilament group into a ring shape to form a welded portion and cutting the inner periphery of the ring-shaped welded portion into a circular shape in a state where the monofilament group pushed open is fixed to the base.

10. A method for manufacturing a rolling toothbrush, characterized in that a monofilament group formed by gathering a plurality of monofilaments into a bundle shape is protruded outward by a certain amount from an insertion hole provided on a base; inserting a cone-shaped bobbin into the center of the protruding end of the monofilament group, and pushing the monofilament group in the radial direction; welding the central part of the monofilament group into a ring shape under the state that the monofilament group which is pushed away is fixed on the pedestal; cutting the inner side of the annular welding part into a circular shape to form a sheet-shaped brush single body, wherein the sheet-shaped brush single body is provided with an insertion hole at the center, and a plurality of bristles radially extend from the insertion hole; inserting and holding a shaft core tube into the insertion hole of the brush unit; taking the brush single bodies out of the pedestal together with the core tube; repeating these steps, inserting and holding a plurality of brush units into the axial core tube, thereby forming a roller-shaped rotating brush in which a plurality of monofilaments radially extend; the rotating brush is rotatably supported by the handle.

11. A method of manufacturing a rolling toothbrush in which a rotary brush is rotatably attached to a handle, the rotary brush being formed by stacking a plurality of brush units, characterized in that a monofilament group formed by bundling a plurality of monofilaments is projected outward by a predetermined amount from an insertion hole provided in a base, air is blown into the center of the projecting end of the monofilament group, the monofilament group is opened in the radial direction, the center portion of the monofilament group is welded in a state where the opened monofilament group is fixed to the base, the center portion of the welded center portion is cut off to form a brush unit, the plurality of brush units are stacked on the same center to form the rotary brush, and then the rotary brush is attached to the handle.

12. A method for manufacturing a brush unit of a rotary brush is a method for manufacturing a brush unit of a rotary brush by overlapping a plurality of brush units, and is characterized by comprising a step 1, a step 2, a step 3 and a step 4, wherein the step 1 is to form a monofilament group by gathering a plurality of monofilaments into a bundle and to extend a certain amount to the outside from an insertion hole arranged on a pedestal; the 2 nd step is to blow air into the center of the protruding end of the monofilament group and open the monofilament group in the radial direction; the 3 rd step is to weld the center part of the monofilament group in a state that the opened monofilament group is fixed on the base; the 4 th step is to cut off the center portion of the welded center portion.

13. A device for manufacturing a brush unit of a rotary brush, which is used for manufacturing the brush unit of the rotary brush by overlapping a plurality of sheets, is characterized by comprising a pedestal, a chuck, a nozzle, a pressing body, a cladding machine and a cutting device, wherein the pedestal is provided with an insertion hole for enabling a monofilament group to pass through, and the monofilament group is formed by gathering a plurality of monofilaments into a bundle; the chuck is used for grabbing the monofilament group and keeping the monofilament group to protrude out of the insertion hole of the pedestal by a certain amount; the nozzle blows air to the center of the protruding end of the monofilament group, and the monofilament group is opened in the radial direction; the pressing body is used for fixing the pushed monofilament group on the pedestal; a welding machine for welding a central portion of the monofilament group in a state where the monofilament group is fixed to the base; the cutting device is used for cutting off the central part of a welding part formed by the welding machine.

14. The apparatus for manufacturing a brush unit of a rotary brush according to claim 13, wherein the chuck is formed of a housing and a cylindrical elastic member disposed inside the housing, and the elastic member is expanded and contracted by supplying exhaust air into the housing to grip or release the monofilament group inserted therein.

15. The apparatus for manufacturing a brush unit of a rotary brush as set forth in claim 13, wherein the nozzle is provided at an inner portion thereof with an air passage for blowing air toward a central portion of the protruding end of the monofilament group, and the cutting means is formed at a front end thereof.

16. The apparatus of claim 13, wherein the nozzle and the deposition machine are mounted on a frame, and move in the left-right and up-down directions through the frame.

17. The manufacturing apparatus of a brush unit of a rotary brush according to claim 13, wherein a slide blade for cutting and removing a welding residue of the monofilament group cut by the cutting means is attached to the base, and an inclined surface is formed on the slide blade; the inclined surface is used for applying force to the direction of drawing out the welding residual part of the monofilament group from the base.