JP2007044105A - Cylindrical brush integrated with boss, its production method, and 360-degree applicable tooth brush using the cylindrical brush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To optimize the density of the bristle by increasing the array pitch of radial blades 30 and achieves a higher productivity and improvements in hygienic aspects by eliminating spacers between the radial blades 30 in the 360 degree applicable brush in which the disclike radial blades 30 are superposed on each other to form a cylindrical brush head 20. <P>SOLUTION: An annular protrusion is formed one surface or both surfaces of each annular core part of the radial blades 30. A prescribed number of radial blades 30 are put on top of each other and the annular core parts of the respective blades 30 are fused together to form a bossed integral cylindrical brush 20 having a cylindrical core part 21 at the center part. The cylindrical brush 20 is mounted at the tip part of a brush handle as a brush head. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an integrated cylindrical brush with a boss used for a brush head of a toothbrush, a manufacturing method thereof, and a 360-degree toothbrush using the cylindrical brush as a brush head.

  As a kind of toothbrush, a 360 degree toothbrush as described in Patent Document 1 is known. This toothbrush has a cylindrical radial brush head at the tip of the brush handle. The radial brush head is composed of disk-shaped radial blades in which a large number of yarn materials extend radially from the annular core portion through which the tip of the brush handle penetrates to the outer periphery side. It is configured by laminating a number of radial blades in the center line direction via an annular spacer. And each radial blade | wing can be manufactured by the method described in patent document 2, for example. The manufacturing method of the radial blade | wing described in patent document 2 is demonstrated with reference to FIGS.

Japanese Patent No. 3646119 Japanese Patent Laid-Open No. 2003-220080

  As shown in FIG. 13, the radial blade manufacturing apparatus includes a yarn opening jig d, a yarn presser e, a welding head f, and a push-off punch g arranged on a processing bed b. The processing bed b has a through hole through which a yarn bundle a formed by bundling a predetermined number of yarn materials passes, and a yarn raising chuck c is provided below the through hole. The yarn opening jig d is concentrically combined inside an annular yarn presser e, and the yarn opening jig d, the yarn presser e, the welding head f, and the push-off punch g are processed by a driving mechanism (not shown) by a processing bed. b is selectively conveyed directly above the through hole b.

  In the manufacturing operation, first, as a first step, the yarn bundle a inserted through the through-hole of the processing bed b is pushed up by the yarn raising chuck c provided below the processing bed b, and is For a predetermined length.

  As a second step, as shown in FIG. 14, a thread opening jig d having a conical lower end surface is pressed against the center of the exposed portion of the yarn bundle a to open the exposed portion to the periphery. As a third step, as shown in FIG. 15, the annular thread presser e combined on the outside of the thread opening jig d is lowered, and the thread material opened halfway is pressed around the through hole of the processing bed b, Open the exposed part of the yarn bundle a completely around.

  As a fourth step, as shown in FIG. 16, the yarn opening jig d is lifted and retracted sideways while the exposed portion of the yarn bundle a is opened radially by the yarn presser e, and the welding head f is replaced instead. The center portion of the yarn material that is radially opened is welded in an annular shape by being moved down directly above the through hole. Finally, as a fifth step, as shown in FIG. 17, the welding head f is raised and retracted to the side, and instead, the push-through punch g is moved to the position directly above the through hole and lowered, so that the inside of the annular welding portion Is removed.

  In this way, a disk-shaped radial blade is manufactured. The manufactured radial blade has a through-hole through which the tip of the brush handle penetrates in the center part, and has an annular core part formed of a welded part around the through-hole, and further from the entire circumference of the core part. It has a large number of yarn materials (blade portions) extending radially to the outer peripheral side.

  Then, a plurality of manufactured radial blades are overlapped and fixed to the tip of the brush handle. Thus, as described above, a 360-degree toothbrush having a cylindrical radial brush head at the handle tip is manufactured.

  The 360-degree toothbrush manufactured in this way has a feature that there is no directionality in the circumferential direction of the brush handle, and it is very easy to handle even for elderly people and children. It is also very suitable for gum massage and tongue coating removal. However, there are the following problems on the other hand.

  The first problem is that the mechanical strength of the individual radial blades constituting the brush head is generally low, and the mechanical strength varies. That is, the mechanical strength of the radial blades depends on the mechanical strength of the annular core portion that is a joint portion of the radial blade portions. Since this annular core portion is a small-diameter and thin annular plate formed by fusing the hair bundle, it is essentially not easy to ensure the mechanical strength. In addition, due to variations in fusing conditions, eccentricity and thickness become non-uniform, resulting in large variations in mechanical strength. For this reason, there is a high risk of radial blades having extremely low mechanical strength being mixed into the brush head. When such low-strength radial blades are mixed into the brush head, the radial blades may become premature during use of the toothbrush. There is a risk of falling off. For this reason, an operation for selecting and removing radial blades having low mechanical strength is required, which requires a great deal of work.

  The second problem is flocking density. In the brush head formed by superimposing multiple radial blades, the flocking density is too large, especially the flocking density in the center line direction is excessive, and the feeling of use is not good, gums, oral mucosa, enamel May be damaged. Further, there are problems that the radial blades are too close and the air permeability is deteriorated and the hygiene is not good, or the hair ends are difficult to enter between the teeth.

  In order to solve these problems, in the 360-degree type toothbrush described in Patent Document 1, radial blades are overlapped while small annular spacers are alternately fitted to intentionally reduce the flocking density in the centerline direction. The increase in the number of parts due to the use of spacers and the increase in cost due to an increase in the number of assembly steps were very serious problems. In addition, there is a problem that foreign matter is mixed in with the insertion of the spacer, or the number of gaps is increased due to the spacer and the sanitary state is deteriorated.

  An object of the present invention is to provide an integrated cylindrical brush with a boss which can be easily attached to a brush handle or the like and has high strength, and a method for manufacturing the same. Another object of the present invention is to provide a 360-degree toothbrush that has high brush strength and is economical and hygienic using the integral cylindrical brush with the boss.

  In order to achieve the above object, an integrated cylindrical brush with a boss of the present invention has a cylindrical core portion provided in the center portion, and a plurality of cylindrical brush portions from the entire circumference in the center line direction of the cylindrical core portion. A thread material is formed to radially extend to the outer peripheral side, and includes a plurality of disk-shaped radial blade portions provided at predetermined intervals in the center line direction of the cylindrical core portion.

  Such an integrated cylindrical brush with a boss is provided with a through hole at the center, an annular core part is provided around the through hole, and a large number of yarn materials are provided from the entire circumference of the annular core part. Disk type radial blades extending radially to the outer peripheral side are overlapped in the center line direction, and at least the inner surface vicinity of the annular core portion of each radial blade is welded and integrated into a cylindrical shape, making it simple and economical Can be manufactured.

  In the integrated cylindrical brush with a boss of the present invention, for example, when a cylindrical brush head is formed at the tip of the brush handle, the cylindrical brush may be attached, and labor for laminating a large number of radial blades. Is no longer necessary. Even if radial blades with low mechanical strength are mixed into the cylindrical brush, the annular core portion of the radial blade is welded to the annular core portion of the adjacent radial blade to be integrated and strengthened. The As a result, a high-strength cylindrical brush in which the radial blades are not easily detached is obtained.

  The radial blades constituting the cylindrical brush may or may not have protrusions integrally formed on one surface or both surfaces of the annular core portion. Moreover, a spacer may be interposed between adjacent radial blades, or may not be interposed. In order to adjust (decrease) the flock density in the center line direction of the cylindrical brush, protrusions and / or spacers are necessary, and it is easier to assemble the cylindrical brush by using protrusions without using spacers. is there. The protrusion may be an annular protrusion that is continuous in the circumferential direction, or may be a plurality of protrusion groups that are provided intermittently in the circumferential direction.

  The 360-degree toothbrush of the present invention is provided with the above-mentioned integrated cylindrical brush with a boss at the tip of the brush handle, so that the assembly of the brush head is simple and the brush head can be replaced. The brush head has high strength and there is no risk of detachment of radial blades.

  The following aspects are possible in the radial blade | wing which comprises a cylindrical brush. In the blade portion composed of a large number of yarn materials extending radially from the annular core portion, a long yarn material and a short yarn material can be mixed. Further, a thread material having a large thread diameter and a thread material having a small thread diameter can be mixed. Furthermore, it is also possible to combine the two to increase the length of the thread material having a large thread diameter and shorten the length of the thread material having a small thread diameter. As a result, the brush rigidity, feel, brushing ability, etc. can be adjusted over a wide range.

  In addition, the cylindrical brush can have a configuration in which hard radial blades using a thread material having a large diameter and soft radial blades using a thread material having a small diameter are mixed. Moreover, the structure where the large diameter radial blade | wing using a long thread material and the small diameter radial blade | wing using a short thread material are mixed is possible. Furthermore, it is possible to combine hard and large-diameter radial blades and soft and small-diameter radial blades. With these configurations, the hardness, feel, brushing ability, etc. of the brush head can be adjusted over a wide range. In addition, it is possible to facilitate the entry of the hair tip between the teeth.

  The integral cylindrical brush with a boss of the present invention employs a configuration in which disk-shaped radial blade portions are provided at predetermined intervals in the center line direction of the cylindrical core portion. In other words, a configuration is adopted in which a large number of disk-shaped radial blades are stacked in the center line direction and the annular core portion is integrated. For this reason, mounting on the brush handle is easy. Since the gap can be eliminated as much as possible from between the radial blades, it is hygienic. Further, even when radial blades having high strength and low mechanical strength are mixed, the mixing does not become a problem, and the sorting operation becomes unnecessary. For these reasons, it is excellent in economic efficiency and quality stability.

  Since the 360 degree type toothbrush of this invention has the brush head which consists of an integrated cylindrical brush with a boss | hub at the front-end | tip part of a brush handle, it is high in productivity, is economical, and is excellent also in hygiene. In addition, it has high strength and there is no risk of the blades falling off during use. An appropriate flocking density can be easily secured and the feeling of use is good. In addition, there is no risk of damaging gums, mucous membranes in the mouth, and enamel. The air permeability in the brush head is improved and the sanitary condition is improved. The tip of the hair is easy to enter between teeth, and the brushing ability is also excellent. Since an appropriate flocking density can be secured without using a spacer, the productivity is high, the economy is excellent, and the hygiene is also excellent.

  In addition, as a disk-type radial blade used in a boss-integrated cylindrical brush, protrusions are integrally formed on one surface or both surfaces of an annular core portion that joins a large number of radially extending yarn materials. When radial blades are used, the hair density in the axial direction of the brush head can be reduced without a spacer. This improves the usability of the toothbrush and eliminates the risk of damaging the gums, oral mucosa and enamel. In addition, the air permeability is improved and the sanitary condition is improved. Furthermore, it becomes easy for a hair tip to enter between teeth, and a brushing capability also improves. Furthermore, by eliminating the spacer, the productivity is high, the economy is excellent, and the sanitary condition is further improved.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of a 360-degree toothbrush showing an embodiment of the present invention, FIG. 2 is a longitudinal side view of a brush head used in the 360-degree toothbrush, and FIG. 3 is used in the brush head. FIG. 4 to FIG. 6 are explanatory views of the manufacturing method and manufacturing apparatus of the brush head, and FIGS. 7 and 8 manufacture a 360-degree toothbrush using the brush head. It is explanatory drawing of the manufacturing method and manufacturing apparatus at the time.

  In the present embodiment, the 360-degree toothbrush has a cylindrical brush head 20 at the tip 11 of a rod-like brush handle 10 as shown in FIG. As shown in FIG. 2, the cylindrical brush head 20 is an integral cylindrical brush with a boss made of nylon resin. More specifically, the cylindrical brush head 20 has a cylindrical cylindrical core portion 21 at the center thereof. A plurality of disk-shaped radial blade portions 22, 22... Are configured such that a large number of yarn members protrude radially from a plurality of locations in the center line direction of the cylindrical core portion 21 to the entire circumference.

  This integral cylindrical brush with a boss is manufactured from a predetermined number of radial blades 30. As shown in FIG. 3, each of the radial blades 30 is a disk-type radial blade formed by processing a nylon resin-based thread material used for a toothbrush. 11 has a through-hole 31 through which it passes. A core portion 32 made of an annular disc body is provided around the through hole 31, and a large number of yarn materials extend radially from the annular core portion 32 at a uniform density in the circumferential direction, and the annular blade A portion 33 is formed. An annular protrusion 34 having a semicircular cross section is integrally formed on one surface of the annular core portion 32 over the entire circumference.

  The integrated cylindrical brush with bosses overlaps a predetermined number of disk-shaped radial blades 30 in the direction of the center line, and between the adjacent radial blades 30, 30, the annular core portions 32, 32 are at least in the vicinity of the inner surface. It is constituted by welding and integrating. That is, the cylindrical core portion 21 is obtained by integrating the annular core portions 32 of the predetermined number of radial blades 30 by welding.

  Next, a method and apparatus for manufacturing a cylindrical brush that is the brush head 20 from the radial blade 20 will be described. The manufacturing method and manufacturing apparatus of the radial blade 30 will be described later.

  As shown in FIGS. 4 to 6, the cylindrical brush manufacturing apparatus 80 includes a horizontal fixing base 82 attached to the middle portion of the vertical base 81 and a horizontal pressing plate provided above the fixing base 82. 83 and a horizontal heater support base 84 provided below the fixed base 82. While the fixed base 82 is not driven up and down, the holding plate 83 and the heater support base 84 are driven up and down along the base 81 on the upper side and the lower side of the fixed base 82.

  The fixed base 82 supports the work support bar 85 perpendicularly to the tip. The work support rod 85 is detachable from the fixed base 82, and pierces and holds a predetermined number of radial blades 30 while being separated from the fixed base 82, and holds the predetermined number of radial blades 30 in a fixed state. 82 is set vertically. The work support bar 85 set on the fixed base 83 can be pulled out upward when pushed from below. The outer diameter of the work support rod 85 is set to be the same as or slightly smaller than the inner diameter of the through-hole 31 so that it can be inserted into the central through-hole 31 of the radial blade 30.

  The holding plate 83 moves up and down while being guided by a positioning rod 86 provided perpendicular to the base of the fixed base 82. By this elevation, the pressing plate 83 reciprocates between the upper retracted position and the lower pressed position. At the upper retracted position, a gap larger than the total thickness of the radial blades 30 stacked a predetermined number of times is fixed to the fixed base 82. The radial blades 30 can be set during this period, and the work support bar 85 can be set on the fixed base 82.

  The heater support 84 supports a vertical round bar heater 87 at the tip. The heater 87 is an electric heater, and is concentrically disposed directly below the work support rod 85 supported by the upper fixed base 82. The outer diameter of the heater 87 is set larger than the inner diameter of the through hole 31 of the radial blade 30 in order to secure the material for forming the cylindrical core 21, and is larger than the outer diameter of the work support rod 85. In other words, in order to secure the material for forming the cylindrical core 21, the inner diameter of the through hole 31 of the radial blade 30 is set smaller than the inner diameter of the cylindrical core 21 that is the product inner diameter.

  In the manufacturing operation of the cylindrical brush, first, as shown in FIG. 4, the pressing plate 83 is fixed at the upper retracted position, and the work support bar 85 is separated from the fixing base 82. The separated workpiece support rod 85 is fitted with the radial blades 30 as many as necessary to form a cylindrical brush. At this time, the direction of each radial blade | wing 30 is made the same. That is, the annular protrusion 34 provided on one surface of the annular core portion 32 is directed to the same side.

  When the radial blades 30 are attached to the work support bar 85, the work support bar 85 is attached to the fixed base 82 as shown in FIG. Then, the pressing plate 83 is lowered, and a predetermined number of radial blades 30 are pressed in the stacking direction so as to adhere to each other. When the predetermined number of radial blades 30 are thus fixed on the fixing base 82, the heater support base 84 is raised as shown in FIG. As a result, the work support bar 85 is pushed by the heater 87 and comes out upward, and instead of the work support bar 85, the heater 87 heated to a predetermined temperature in advance is pushed into the predetermined number of radial blades 30 in a skewered state.

  Here, the outer diameter of the heater 87 is larger than the inner diameter of the through hole 31 of the radial blade 30. For this reason, with the insertion of the heater 87, in the predetermined number of radial blades 30, each annular core portion 32 is heated and melted from the inside, and at least the vicinity of the inner peripheral surface of each annular core portion 32 is integrated into a cylindrical shape. The cylindrical core portion 21 is formed. On the other hand, the radial blade portions 33 of the respective radial blades 30 remain as they are to become disk-shaped radial blade portions 22. Thus, an integral cylindrical brush with a boss in which the radial blade portions 22 are integrally formed around the cylindrical core portion 21 at a predetermined interval is completed.

  When the integrated cylindrical brush with the boss is completed, the cylindrical brush as the brush head 20 is fitted into the distal end portion 11 of the brush handle 10 as shown in FIG. The tip 11 of the brush handle 10 is designed to have a diameter slightly larger than the inner diameter of the cylindrical brush so that the fitted cylindrical brush does not come off. When the mounting of the brush head 20 is finished, the brush handle 10 is set downward on the welding machine 60, and the welding machine 60 is raised by the air cylinder and pressed against the tip surface of the brush handle 10, thereby the vicinity of the tip surface. Is processed thickly. Thus, the integrated cylindrical brush with a boss as the brush head 20 is fixed to the tip of the brush handle 10. The welding time is set as a timer, and the pressurization speed, pressure, and heating temperature are set appropriately in consideration of room temperature and the like.

  When the installation of the brush head 20 is completed, the brush handle 10 is sent to the next process by the conveyor. In this step, as shown in FIG. 8, the outer peripheral surface of the completed brush head 20 is processed by a hair tip rounding machine 70. The pre-rounding machine 70 fixes to the surface of the drum 71 a piece of sandpaper having a width of about 10 mm adhered to the surface of the No. 400 sandpaper in the diagonal direction, and the drum 71 is rotated by a drive motor 72. It is configured. Then, the outer peripheral surface of the brush head 20 is brought into contact with the surface of the rotating drum 71, and the brush head 20 is moved in the axial direction while rotating in this state. Thereby, each hair end in the brush head 20 is processed into a round shape. The tension of the paper portion is appropriately adjusted in consideration of the material and diameter of the thread material.

  In the present embodiment, a 360-degree toothbrush is completed through the above steps. The features of the completed 360-degree toothbrush are as follows.

  The brush head 20 is constituted by an integral cylindrical brush with a boss, and a 360-degree toothbrush is completed simply by mounting the cylindrical brush on the tip 11 of the brush handle 10. For this reason, the assembly operation of the 360-degree toothbrush is extremely easy. Further, it is easy to detachably attach the boss-integrated cylindrical brush to the tip end portion of the brush handle, thereby enabling a head replacement type.

  The integral cylindrical brush with a boss is composed of a predetermined number of radial blades 30. One problem with the radial blades 30 is that the annular core portion 32 that joins the surrounding blade portions 33 is a welded portion, so that the mechanical strength varies. For this reason, in the case of the above-described brush head 20 in which a predetermined number of radial blades 30 are simply stacked, the radial blades 30 having a weak mechanical strength of the annular core portion 32 may be mixed, and the mixed mechanical strength is low. The weak radial blade 30 has a high risk of falling off early during use. For this reason, it is necessary to check the mechanical strength of the annular core portion 32 and the mixing of the radial blades 30 whose mechanical strength is weak, which takes a lot of time and effort.

  However, in the case of a cylindrical brush, the annular core portions 32 of the predetermined number of stacked radial blades 30 are fused together with the annular protrusions 34 to form a high-strength cylindrical core portion 21 that should also be called a boss portion. To do. For this reason, the low mechanical strength of the annular core portion 32 of the mixed radial blade 30 is not a problem. It is the greatest feature of the integral cylindrical brush with boss that the problem of low mechanical strength of the annular core portion 32 in the radial blade 30 is solved.

  Thus, the boss-type integrated cylindrical brush head has very high strength. The results of the tensile test are shown in Table 1 in comparison with each case of a normal flocking rotary brush and a radial blade with an annular protrusion. A radial vane head with an annular projection is also sufficiently strong, but an integral cylindrical brush head with a boss is even stronger.

  In the radial blade 30 used for the cylindrical brush, a boss-shaped annular protrusion 34 is integrally formed on one surface of the disk-shaped annular core portion 32. For this reason, a predetermined clearance is ensured between the blade | wing parts 33 of the adjacent radial blade | wing 30 only by stacking the radial blade | wing 30 toward the same direction, without interposing a spacer between adjacent blade | wings. For this reason, in the cylindrical brush head 20, the flocking density in the center line direction can be reduced to an appropriate range. This improves the feeling of use and eliminates the risk of damaging the gums, oral mucosa and enamel. Also, the air permeability is improved and the hygienic condition is improved. In addition, there is an advantage that the hair tip is easy to enter between the teeth, and it is easy to reach the final molar.

  As will be described later, the annular protrusion 34 is formed at the same time as the formation of the annular core portion 32, and no extra cost is required for the formation. Therefore, this does not increase the product cost.

  The height of the boss portion formed of the annular protrusion 34 is preferably 0.1 to 0.4 mm. If this is too low, the flocking density in the axial direction of the brush head will not be sufficiently reduced. On the other hand, if it is too high, the flocking density becomes too sparse, causing practical problems. Moreover, this boss | hub part is formed by the resin inflow from a welding part. The excessively high boss portion is difficult to form from the viewpoint of securing the amount of resin.

  In the manufacture of a cylindrical brush, since it is not necessary to use a spacer, an increase in the number of parts can be avoided, and the manufacturing process can be greatly rationalized. For these reasons, the manufacturing cost can be greatly reduced. In addition, contamination with foreign matters is avoided, and the hygiene condition is further improved. The operation of alternately passing the radial blades 30 and the spacers is very inefficient and the time loss is enormous. By inserting only the radial blades 30, the assembly time is halved, and mass production and product price are greatly reduced.

  Thus, in this embodiment, a characteristic and high-quality 360 degree toothbrush is economically manufactured and offered to the market at a low price.

  In the above embodiment, the radial blade 30 having the protrusions 34 on one side of the annular core portion 32 is used to manufacture the cylindrical brush 20, but the radial blade 30 having the protrusions 34 on both sides of the annular core portion 32 is used. You can also Moreover, it is also possible to use the radial blade | wing 30 without the protrusion 34, and a spacer can also be interposed between the adjacent radial blade | wings 30 and 30. FIG. When the spacer is interposed, a part of the spacer melts together with a part of the radial blades 30 and 30 to form a cylindrical core.

  When the radial blade 30 with the protrusion 34 is used, an annular space is formed inside the protrusion 34. When a spacer is used, an annular space is created inside the spacer depending on its size. When the radial blades 30 are fused, the diameter difference between the inner diameter of the radial blades 30 and the outer diameter of the heater 87 is increased from the necessity of filling the annular space to form the cylindrical core 21. It is necessary to secure a lot. On the other hand, when the radial blades 30 without the projections 34 are used, this annular space cannot be formed, so that the difference in diameter between the inner diameter of the radial blades 30 and the outer diameter of the heater 87 is substantially unnecessary.

  Finally, the manufacturing method and apparatus of the radial blade 30 will be described. 9-11 is explanatory drawing of the manufacturing method and manufacturing apparatus of the radial blade | wing.

  As shown in FIG. 9, the radial blade manufacturing apparatus 40 manufactures the radial blade 30 from a yarn bundle 50 configured by bundling nylon resin-based yarn materials 51. For this production, the production apparatus 40 includes a processing bed 41 and a cylindrical welding head 42 provided thereon. The processing bed 41 has a through hole 41d through which the yarn bundle 50 passes, and is provided with push-up chucks 44 and 45 that push up the yarn bundle 50 below.

  On the surface of the processing bed 41, an annular blade portion 41a is provided in contact with the through hole 41d. The annular blade portion 41 a increases from the outer peripheral side toward the inner peripheral side, and the inner peripheral surface is continuous with the inner peripheral surface of the through hole 43. An annular recess 41b is provided in contact with the annular blade 41a on the outer peripheral side of the annular blade 41a. The annular recess 41 b is for forming the annular protrusion 34 of the radial blade 30, and has a semicircular sectional shape corresponding to the sectional shape of the annular protrusion 34. On the further outer peripheral side of the annular recess 41b, another annular recess 41c is provided with a slight gap. The annular recess 41 c is used for cutting for aligning the outer diameter of the radial blade 30.

  The cylindrical welding head 42 is disposed concentrically on the through hole 41d of the processing bed 41 and is driven up and down by a drive mechanism (not shown). The welding head 42 is a welding horn that performs welding by ultrasonic vibration, and is driven by a vibrator (not shown). A through hole provided at the center of the welding head 42 is an air hole 42c and is used to open the yarn bundle 50 to the periphery. The tip of the welding head 42 also serves as a thermal cutting punch, and the air hole 42c is enlarged so that the inner peripheral edge 42a is combined with the annular blade 41a of the processing bed 41 to form a blade. An annular tip surface of the welding head 42 is a welding surface 42b.

  In the operation, the yarn bundle 50 is pierced from the lower side (back side) to the upper side (front side) through the through hole of the processing bed 41, and is pushed up by the push-up chuck 44 provided under the processing bed 41. A predetermined amount is exposed on top. The exposure amount is set larger than the radius of the radial blade 30. When a predetermined amount of the yarn bundle 50 is exposed on the processing bed 41, the welding head 42 blows out air and descends while vibrating. The blown air from the welding head 42 collides with the central portion of the exposed portion of the lower yarn bundle 50. Thereby, the exposed part of the yarn bundle 50 opens evenly to the periphery. In this state, the welding head 42 continues to descend, and the yarn bundle 50 opened to the periphery is pressed against the processing bed 41. Thereby, as shown in FIG. 10, the exposed part of the yarn bundle 50 opens completely to the periphery and becomes radial. The vibration of the welding head 42 contributes to evenly and smoothly opening the exposed portion of the yarn bundle 50 to the surroundings.

  When the opening of the yarn bundle 50 by the welding head 42 is finished, the opened yarn bundle 50 is fixed by the annular yarn presser 47. The thread retainer 47 is disposed concentrically above the processing bed 41 so as to surround the welding head 42 and is driven up and down independently of the welding head 42. The lower surface of the thread retainer 47 is a Teflon-coated surface 47a in order to open the thread bundle 50 beautifully, and the friction coefficient is reduced. An annular cutting blade 48 is attached to the outer peripheral side of the thread retainer 47. The cutting blade 48 corresponds to an annular recess 41 c provided on the surface of the processing bed 41. Therefore, the yarn bundle 50 is radially fixed by the lowering of the yarn presser 48, and at the same time, the radial yarn bundle 50 is cut to a predetermined outer diameter by the cutting blade 48.

  In parallel with the cutting of the outer diameter of the radially opened yarn bundle 50, the welding head 42 pressurizes the central portion of the radially opened yarn bundle 50, and the central portion is welded annularly with the annular welding surface 42b at the tip. . While performing welding, the inner peripheral edge 42a of the welding head 42 is pressed toward the annular blade 41a of the processing bed 41, whereby the inside of the welded portion is thermally cut in an annular shape and the inside is removed. Here, the thread material is mainly composed of nylon resin. For this reason, a part of the molten material flows into the recess 41 b provided on the surface of the processing bed 41 simultaneously with the welding. Thus, the radial blade 30 in which the annular protrusion 34 having a semicircular cross section is integrally formed on one surface of the annular core portion 32 is manufactured.

  In the present embodiment, the radial blades 30 are quickly manufactured from the yarn bundle 50 in a fixed position in this way. Specifically, the opening, fixing, cutting of the outer diameter of the yarn bundle 50, the annular welding at the center, and the excision inside the welding portion are continuously performed at a fixed position. In particular, the opening of the yarn bundle 50 and the annular welding at the center are performed. The removal of the inside of the welded portion is performed simultaneously by the welding head 42. Accordingly, the radial blades 30 are manufactured from the hair bundle 50 with particularly high efficiency.

  The radial blades 30 manufactured on the processing bed 41 are separated from the yarn bundle 50 by removing the inside of the annular core portion 32 that is a welded portion. The tip of the remaining hair bundle 50 is excessively fixed by welding. When the welding head 42 and the thread presser 47 are raised to their original positions, as shown in FIG. 11, the thread bundle 50 is pushed up by about 2 mm, for example, by another thread raising chuck 45, and the excessive welded part 52 at the tip is moved in the horizontal direction. It is removed by the cutter 46. As a result, the tip of the yarn bundle 50 is separated and prepared for the production of the next radial blade. The cut excess welded portion 52 is sucked by an air blow 49 provided on the side. When the welding head 42 and the thread presser 47 are raised to their original positions, the manufactured radial blades 30 are also released and sucked by the air blow 49.

  By repeating this, the radial blades 30 are continuously produced from the hair bundle 50 with high efficiency. As described above, a cylindrical brush is manufactured from the manufactured radial blade 30 and assembled into a 360-degree toothbrush.

  FIG. 12 is a cross-sectional view showing another example of radial blades.

  In the radial blade 30, annular protrusions 34 and 34 are provided on both surfaces of the annular core portion 32. As a method of providing the annular protrusions 34 on both surfaces of the annular core portion 2, an annular recess corresponding to the annular recess 41 b formed on the surface of the processing bed 41 is also formed on the annular tip welding surface 42 b of the welding head 42. do it. Thereby, simultaneously with the formation of the annular core portion 32, the annular protrusions 34, 34 can be formed on both surfaces thereof.

  In the cylindrical brush formed by overlapping the radial blades 30, the annular protrusions 34, 34 facing each other between the adjacent radial blades 30, 30 overlap to form a spacer, thereby reducing the flocking density in the axial direction. To do. In this case, the height of the annular protrusion 34 may be ½ that when the annular protrusion 34 is provided on one side. Since the radial blade 30 provided with the annular protrusions 34 on both surfaces of the annular core portion 32 has no directionality, it is easy to handle when assembling the cylindrical brush.

  For reference, the thickness of the yarn material and the blade diameter in the radial blade 30 will be described. The thickness of the thread material used for a general toothbrush is usually 0.15 to 0.2 mm. In contrast, in the 360-degree toothbrush of the present invention, when brushing teeth on one side of the brush head, the oral mucosa is rubbed on the other side. For this reason, a thread material having a diameter of 0.08 to 0.14 mm, which is thinner than a thread material used for general toothbrushes, is preferable as the thread material in the radial blade of the present invention. More specifically, a thread material having a diameter of 0.11 to 0.14 mm is suitable as a normal hardness brush, and 0.08 to 0.10 mm as a soft brush gentle to the gums and oral cavity. A diameter thread material is suitable. The thick thread material mentioned above is the former, and the thin thread material is the latter.

  As for the blade diameter, 15 to 18 mm, which is the same as the thickness of the head portion of a general toothbrush, is appropriate from the viewpoints of usability and brushing properties. In the case of a brush head in which a large-diameter blade having a long yarn material in the brush portion and a small-diameter blade having a short yarn material in the brush portion are mixed, the diameter of the large-diameter blade corresponds to the normal diameter. 8 to 0.95 times is appropriate. When the diameter difference here is small, the meaning of giving the diameter difference is diminished. If the diameter difference is too large, the short thread material will not hit the gums. Even when a long yarn material and a short yarn material are mixed in the brush portion of one radial blade, a yarn length difference according to this diameter difference is desired.

It is an external view of a 360 degree type toothbrush which shows one Embodiment of this invention. It is a vertical side view of the cylindrical brush currently used for the 360 degree type toothbrush. It is the front view and AA sectional drawing of the radial blade | wing currently used for the brush head. It is explanatory drawing of the manufacturing method and manufacturing apparatus of the same cylindrical brush, and shows the lamination | stacking process of a radial blade | wing. It is explanatory drawing of the manufacturing method and manufacturing apparatus of the same cylindrical brush, and the pressurization process of a radial blade | wing is shown. It is explanatory drawing of the manufacturing method and manufacturing apparatus of the same cylindrical brush, and shows the fusion | melting process of a radial blade | wing. It is explanatory drawing of the manufacturing method and manufacturing apparatus in the case of manufacturing a 360 degree type toothbrush using the same brush head, and shows the fixing process of a cylindrical brush. It is explanatory drawing of the manufacturing method and manufacturing apparatus in the case of manufacturing a 360 degree type toothbrush using the same brush head, and shows the grinding | polishing process of a cylindrical brush. An opening process is shown in an explanatory view of the manufacturing method and manufacturing apparatus of the radial blade. The welding removal process is shown in an explanatory view of the radial blade manufacturing method and manufacturing apparatus. The removal process of the excess welding part is shown with explanatory drawing of the manufacturing method and manufacturing apparatus of the radial blade | wing. It is sectional drawing which shows another example of a radial blade | wing. It is explanatory drawing of the manufacturing apparatus of the conventional radial blade | wing. An opening process is shown in an explanatory view of a manufacturing method using a conventional apparatus. An opening process is shown in an explanatory view of a manufacturing method using a conventional apparatus. The welding process is shown in an explanatory diagram of a manufacturing method using a conventional apparatus. The removal process is shown in an explanatory diagram of a manufacturing method using a conventional apparatus.

Explanation of symbols

10 Brush handle 20 Brush head (cylindrical brush)
DESCRIPTION OF SYMBOLS 21 Cylindrical core 22 Radial blade part 30 Disc type radial blade 31 Through-hole 32 Annular core part 33 Blade part 34 Protrusion 40 Radial blade manufacturing apparatus 41 Processing bed 42 Welding heads 44, 45 Chuck 46 Cutter 47 Yarn presser 48 Cutting blade 49 Air blow 50 Yarn bundle 80 Cylindrical brush manufacturing device 81 Base 82 Fixing base 83 Presser plate 84 Heater support base 85 Work support rod 87 Heater

Claims (8)

  A cylindrical core portion provided in the central portion, and a plurality of thread materials extending radially from the entire circumference in the center line direction of the cylindrical core portion to the outer peripheral side, and the cylindrical shape A boss-integrated cylindrical brush having a plurality of disc-shaped and radial blade portions provided at predetermined intervals in the center line direction of the core portion.   A disk type in which a through-hole is provided in the center, an annular core is provided around the through-hole, and a large number of yarn materials radially extend from the entire circumference of the annular core to the outer periphery. A boss-equipped integral cylinder according to claim 1, wherein the radial blades are laminated in the center line direction, and at least the inner surface vicinity of the annular core portion of each radial blade is fused and integrated into a cylindrical shape. Brush.   3. The integral cylindrical brush with a boss according to claim 2, wherein the radial blade has a protrusion integrally formed on one surface or both surfaces of the annular core portion.   The integral cylindrical brush with a boss according to claim 2, further comprising a spacer between adjacent radial blades.   A 360-degree toothbrush comprising the boss-integrated cylindrical brush according to any one of claims 1 to 4 mounted on the tip of a brush handle.   A disk type in which a through-hole is provided in the center, an annular core is provided around the through-hole, and a large number of yarn materials radially extend from the entire circumference of the annular core to the outer periphery. A cylindrical brush including a laminating step of laminating the radial blades in the center line direction, and a fusing step of fusing at least the inner surfaces of the annular core portions of the plurality of laminated radial vanes to integrate them in a cylindrical shape Manufacturing method.   In the fusion step, a cylindrical core portion is formed by inserting a rod-shaped heater through the central through-holes of the plurality of stacked radial blades and heating and melting the annular core portion of the plurality of radial blades from the inside. The manufacturing method of the cylindrical brush of Claim 6 which forms. The manufacturing method of the cylindrical brush of Claim 7 which ensures the material for forming a cylindrical core part by making a rod-shaped heater larger diameter than the center through-hole of a radial blade | wing.

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