JP4000355B2 - Radial blade for toothbrush, toothbrush using the same, and method and apparatus for manufacturing the radial blade for toothbrush - Google Patents

Description

  The present invention relates to a disk-shaped radial blade used for a brush head of a toothbrush, a 360-degree toothbrush having a cylindrical radial head using the same as a brush head, and a manufacturing method for manufacturing the radial blade for the toothbrush. And a manufacturing apparatus.

  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 a brush handle, and the brush head can be manufactured by, for example, a method described in Patent Document 2.

[Patent Document 1] JP-A-9-168427 [Patent Document 2] JP-A 2003-220080

  In the method described in Patent Document 2, disk-shaped radial blades in which a large number of yarn materials radially extend from the central portion to the outer peripheral side are manufactured, which are sequentially stacked and mounted on the tip of the brush handle. Thus, a cylindrical radial brush head is manufactured. The manufacturing method of the radial blade | wing described in patent document 2 is demonstrated with reference to FIGS.

  As shown in FIG. 19, the manufacturing apparatus includes a yarn opening jig d, a yarn presser e, a welding head f, and a push-off punch g arranged on the 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 operation, first, as a first step, the thread bundle a inserted through the through-hole of the processing bed b is pushed up by a yarn lifting chuck c provided below the processing bed b, and is then placed on the processing bed b. Expose for a predetermined length.

  As a second step, as shown in FIG. 20, 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 the third step, as shown in FIG. 21, the annular thread presser e combined on the outside of the thread opening jig d is lowered, and the thread material that has been 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. 22, 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 shown in FIG. 23, as the fifth step, as shown in FIG. 23, 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. 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, and has an annular weld around the through-hole, and further radially from the weld to the outer peripheral side. It has a number of extended thread materials (brush parts). A 360-degree toothbrush having a cylindrical radial brush head at the handle tip is manufactured by stacking and fixing a plurality of these on the tip of the brush handle.

  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.

  In a brush head formed by superimposing a plurality of radial blades manufactured by the method described in Patent Document 2, the hair density is too large, especially the hair density in the axial direction is excessive, and the feeling of use is not good. In addition, the gums, oral mucosa and 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, until now, radial blades were overlapped while alternately inserting small annular spacers to intentionally reduce the hair density in the axial direction. However, an increase in the number of parts due to the use of spacers and an increase in cost due to an increase in the number of assembly steps have been very serious problems. In addition, there is a problem that the sanitary condition is deteriorated due to the inclusion of foreign matters accompanying the insertion of the spacer and the increase in the gap due to the spacer.

  Yet another problem is the complexity of using multiple tools before the radial blades are completed. That is, an independent process using a separate tool is necessary, such as pushing the yarn bundle a with the yarn opening jig d, fixing with the yarn presser e, welding with the welding head f, and removal of the center portion with the push-off punch g. There are many. For this reason, there was a problem that productivity did not increase and the product price became very high.

  An object of the present invention is to provide a radial blade for a toothbrush that can easily reduce and adjust the hair density in the axial direction, a manufacturing method and a manufacturing apparatus for the radial blade, and a highly functional and economical 360-degree type using the radial blade. To provide a toothbrush.

  Another object of the present invention is to provide a method and apparatus for manufacturing radial blades for toothbrushes that can reduce the number of manufacturing steps and greatly reduce the price of the toothbrush.

  The radial blade for a toothbrush of the present invention has a through hole through which the tip of the brush handle penetrates at the center, an annular welded portion around the through hole, and a large number of yarn materials from the welded portion. Is a disk-shaped radial blade extending radially toward the outer peripheral side, and has a protrusion integrally formed on one surface or both surfaces of the welded portion.

  In the radial blade for a toothbrush of the present invention, the protrusion is integrally formed on one surface or both surfaces of the annular welded portion, so that the radial brush is mounted when mounted on the tip of the brush handle. There is a gap between the parts. Thereby, even if it does not use a spacer, the bristle density in an axial direction falls and a toothbrush function improves. The width of the gap can be arbitrarily adjusted by changing the height of the protrusion.

  The protrusion may be an annular protrusion that is continuous in the circumferential direction, or an aggregate of a plurality of protrusions that are intermittently disposed in the circumferential direction.

  In the brush portion in which a large number of yarn materials extend radially from the annular welded portion, a yarn material having a long yarn length and a yarn material having a short yarn length 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. Thus, the brush rigidity, feel, brushing ability, etc. can be adjusted within the range.

  The 360-degree toothbrush of the present invention has a cylindrical radial brush head formed by overlapping a plurality of radial blades of the present invention at the tip of the brush handle.

  In the 360-degree toothbrush of the present invention, since the cylindrical brush head is formed by overlapping the radial blades with protrusions integrally formed on the surface of the welded portion, the arrangement pitch of the radial blades in the brush head is widened. Thereby, even if it does not use a spacer, hair density falls and a toothbrush function improves.

  The brush head may 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, it can be set as 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 coexist. 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, and brushing ability 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 method for manufacturing radial blades for toothbrushes of the present invention includes a feeding step in which a yarn bundle formed by bundling a large number of yarn materials is penetrated from the back side to the front side of the processing bed and exposed on the processing bed for a predetermined length; An opening step of radially opening the exposed portion of the processing bed to the periphery on the surface of the processing bed, a welding step of annularly welding the central portion of the radially opened yarn bundle, and a removal step of removing the inside of the annular welded portion In the welding step, when the center portion of the radially opened yarn bundle is welded, a protrusion is simultaneously formed on the surface of the welded portion.

  In the method for manufacturing the radial blades for toothbrushes of the present invention, the center part of the yarn bundle that is exposed on the processing bed and opened radially is welded in an annular shape, and at the same time, protrusions are simultaneously formed on the surface of the welded part. Radial blades having protrusions can be efficiently and economically manufactured.

  Further, another radial blade manufacturing method for a toothbrush according to the present invention is a supply step in which a yarn bundle formed by bundling a large number of yarn materials is penetrated from the back surface side to the front surface side of the processing bed and exposed on the processing bed for a predetermined length. And an opening step of opening the exposed portion of the yarn bundle radially on the surface of the processing bed, and pressing the center portion of the radially opened yarn bundle onto the processing bed by a cylindrical welding head that also serves as a punch. And a welding removal step of removing the inside of the annular welded portion simultaneously with the annular welding.

  In another method of manufacturing a radial blade for a toothbrush of the present invention, the center portion of the yarn bundle exposed on the processing bed and opened radially is welded in an annular shape by a cylindrical welding head that also serves as a punch, and at the same time, the welded portion. The inside is removed, and welding and removal are performed with one tool and one process. For this reason, the radial blade is efficiently and economically manufactured with a small number of steps.

  If an annular blade portion that cuts out the inside of the annular welded portion is provided around the through hole of the processing bed in cooperation with the inner peripheral edge of the welding head, the inside of the welded portion is more reliably and smoothly removed. be able to.

  Moreover, if an annular recess into which the molten material flows or a plurality of recesses intermittently arranged in the circumferential direction is provided around the through hole of the processing bed, the center portion of the yarn bundle that is radially opened can be provided. When welding in a ring shape, protrusions can be simultaneously formed on the surface of the welded portion.

  The apparatus for manufacturing radial blades for toothbrushes according to the present invention includes a supply means for exposing a predetermined length of a thread bundle formed by bundling a large number of thread materials and penetrating from the back surface side to the front surface side of the processing bed. , Opening means for radially opening the exposed portion of the yarn bundle to the periphery on the surface of the processing bed, welding means for welding the center portion of the radially opened yarn bundle in an annular shape, and removal for removing the inside of the annular welded portion And having a plurality of recesses formed in an annular shape or intermittently arranged in the circumferential direction around the through hole of the processing bed so that the molten material flows during welding. .

  In the radial blade manufacturing apparatus for toothbrushes of the present invention, an annular recess or a plurality of recesses intermittently arranged in the circumferential direction is provided around the through hole of the processing bed so that the molten material flows during welding. Therefore, the center part of the radially opened yarn bundle can be welded in an annular shape, and at the same time, protrusions can be formed on the surface of the welded part.

  Another apparatus for manufacturing radial blades for toothbrushes according to the present invention comprises a supply means for penetrating a thread bundle formed by bundling a large number of thread materials from the back surface side to the front surface side of the processing bed and exposing it for a predetermined length on the processing bed, An opening means for radially opening the exposed portion of the bundle to the periphery on the surface of the processing bed and a center portion of the radially opened yarn bundle are pressed onto the processing bed by a cylindrical welding head that also serves as a punch, and welded in an annular shape At the same time, a welding removal means for removing the inside of the annular welded portion is provided.

  In another toothbrush radial blade manufacturing apparatus according to the present invention, the annular welding and the removal of the inside of the welded portion are simultaneously performed by one tool and one process by the cylindrical welding head that also serves as a punch. Is manufactured efficiently and economically with a small number of processes.

  Here, the welding head has a discharge hole for discharging gas at the center and can be moved up and down in the direction of the central axis, and the yarn bundle released to the periphery by the discharge gas is pressed onto the processing bed and fixed radially. Is preferred. With this configuration, the welding head can also serve as an opening means, and the manufacturing process can be further rationalized.

  If an annular blade portion for removing the inside of the annular welded portion is provided around the through hole of the processing bed in cooperation with the punch, the inside of the welded portion can be removed more reliably and smoothly.

  If an annular recess or a plurality of recesses intermittently arranged in the circumferential direction are provided around the through-hole of the processing bed so that the molten material flows during welding, the surface of the welded portion is simultaneously formed with the welding. A spacer projection can be formed.

  The radial blade for a toothbrush of the present invention employs a structure in which protrusions are integrally formed on one surface or both surfaces of an annular welded portion that joins a large number of radially extending yarn materials. The hair density in the axial direction can be reduced. 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, since it is not necessary to use a spacer, the productivity is high, the economy is excellent, and the sanitary condition is further improved.

  The 360-degree toothbrush of the present invention has a cylindrical radial brush head formed by overlapping a plurality of the radial blades at the tip of the brush handle, so that an appropriate bristle density is ensured and the usability is good. In addition, there is no risk of damaging gums, mucous membranes in the mouth, and enamel. Furthermore, the air permeability in the brush head is improved and the sanitary condition is improved. Furthermore, it becomes easy for a hair tip to enter between teeth, and the brushing ability is also excellent. Moreover, since an appropriate hair density is ensured without using a spacer, the productivity is high, the cost is excellent, and the hygiene is also excellent.

  In the method for manufacturing radial blades for toothbrushes according to the present invention, the central portion of the yarn bundle that is exposed on the processing bed and opened radially is welded in an annular shape, and at the same time, protrusions are simultaneously formed on the surface of the welded portion. Radial blades having protrusions can be produced efficiently and economically. Thereby, a high-quality 360 degree toothbrush can be provided at low cost.

  Another method for manufacturing radial blades for toothbrushes according to the present invention is to weld the center portion of the yarn bundle exposed on the processing bed and radially open by a cylindrical welding head that also serves as a punch, and at the same time, Since the inside is removed, and welding and removal are performed in one tool and one process, radial blades can be manufactured efficiently and economically with a small number of processes. Thereby, the manufacturing cost of the 360-degree toothbrush can be greatly reduced.

  The radial blade manufacturing apparatus for a toothbrush of the present invention has a recess formed in an annular shape so that a molten material flows in at the time of welding or a plurality of recesses intermittently arranged in the circumferential direction around the through hole of the processing bed. Therefore, the center part of the radially opened yarn bundle is welded in a ring shape, and at the same time, a protrusion can be formed on the surface of the welded part, and a radial blade having a protrusion on the welded part can be manufactured at low cost. Thereby, a high-quality 360 degree toothbrush can be provided at low cost.

  Since the radial blade manufacturing apparatus for toothbrushes according to the present invention performs welding and removal of the inside of the welded portion simultaneously with one tool and one process by a cylindrical welding head that also serves as a punch, the number of the radial blades can be reduced. It can be manufactured efficiently and economically, and the manufacturing cost of the 360-degree toothbrush can be greatly reduced.

  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 front view of a radial blade used in the 360-degree toothbrush, a cross-sectional view along AA, and FIGS. Explanatory drawing of the manufacturing method and manufacturing apparatus of the radial blade, FIGS. 6-8 is explanatory drawing of the method of manufacturing a 360 degree type toothbrush using the radial blade.

  In the present embodiment, the 360-degree toothbrush has a cylindrical brush head at the tip of the brush handle 14 as shown in FIG. The cylindrical brush head is configured by superposing a predetermined number of disk-shaped radial blades 1 formed by processing a nylon resin thread material used for a toothbrush in the central axis direction.

  As shown in FIG. 2, the radial blade 1 has a through-hole through which the tip of the brush handle 14 penetrates at the center. Around the through hole, a welded portion 2 made of an annular disc body is provided, and from the welded portion 2, a large number of yarn materials extend radially to form an annular brush portion. An annular protrusion 3 having a semicircular cross section is integrally formed on one surface of the welded portion 2 over the entire circumference.

  Such a radial blade 1 is manufactured as follows. As shown in FIG. 3, the manufacturing apparatus manufactures the radial blades 1 from a yarn bundle 4 configured by bundling nylon resin-based yarn materials 4A. For this production, a processing bed 6 and a cylindrical welding head 5 provided thereon are provided. The processing bed 6 has a through-hole through which the yarn bundle 4 passes, and is equipped with push-up chucks 7 and 8 for pushing up the yarn bundle 4 below.

  On the surface of the processing bed 6, an annular blade portion 6B is provided in contact with the through hole. The annular blade portion 6B becomes higher 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. An annular recess 6C is provided on the outer peripheral side of the annular blade portion 6B in contact with the annular blade portion 6B. The annular recess 6 </ b> C is for forming the annular protrusion 3 of the radial blade 1, and has a semicircular sectional shape corresponding to the sectional shape of the annular protrusion 3. On the further outer peripheral side of the annular recess 6C, another annular recess 6A is provided with a slight gap. The annular recess 6 </ b> A is used for cutting for aligning the outer diameter of the radial blade 1.

  The cylindrical welding head 5 is disposed concentrically on the through hole of the processing bed 6 and is driven up and down by a drive mechanism (not shown). The welding head 5 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 5 is an air hole 5A, which is used to open the yarn bundle 4 to the periphery. The tip of the welding head 5 also serves as a thermal cutting punch, and the air hole 5A is enlarged so that the inner peripheral edge 5B is combined with the blade 6B of the processing bed 6 to form a blade. An annular front end surface 5C of the welding head 5 is a welding surface.

  In the operation, the yarn bundle 4 is inserted from the lower side (back side) into the upper side (front side) through the through hole of the processing bed 6 and is pushed up by the push-up chuck 7 provided under the processing bed 6. A predetermined amount is exposed on top. The exposure amount is set larger than the radius of the radial blade 1. When the yarn bundle 4 is exposed on the processing bed 6 by a predetermined amount, the welding head 5 blows down air and descends while vibrating. The blown air from the welding head 5 collides with the central portion of the exposed portion of the lower yarn bundle 4. Thereby, the exposed part of the yarn bundle 4 is evenly opened to the periphery. In this state, the welding head 5 continues to descend, and the yarn bundle 4 opened to the periphery is pressed against the processing bed 6. As a result, the exposed portion of the yarn bundle 4 is completely opened radially and becomes radial. The vibration of the welding head 5 contributes to opening the exposed portion of the yarn bundle 4 evenly and smoothly to the surroundings.

  When the opening of the yarn bundle 4 by the welding head 5 is finished, the opened yarn bundle 4 is fixed by an annular yarn retainer 9 as shown in FIG. The thread retainer 9 is disposed concentrically so as to surround the welding head 5 above the processing bed 6, and is driven up and down independently of the welding head 5. The bottom surface of the thread retainer 9 is a Teflon (registered trademark) coating surface 9A to open the thread bundle 4 beautifully, and the friction coefficient is reduced. An annular cutting blade 10 is attached to the outer peripheral side of the thread retainer 9. The cutting blade 10 corresponds to an annular recess 6 </ b> A provided on the surface of the processing bed 6. Therefore, the yarn bundle 4 is fixed radially by the lowering of the yarn retainer 9, and at the same time, the radial yarn bundle 4 is cut to a predetermined outer diameter by the cutting blade 10.

  Concurrently with the cutting of the outer diameter of the radially open yarn bundle 4, the welding head 5 pressurizes the central portion of the radially open yarn bundle 4, and the central portion is annularly welded by the annular welding surface 5C at the tip. . While the welding is performed, the inner peripheral edge 5B of the welding head 5 is pressed toward the blade 6B of the processing bed 6, whereby the inside of the welding portion 2 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 6C provided on the surface of the processing bed 6 simultaneously with the welding, and the annular projection 3 having a semicircular cross section is integrally formed on one surface of the welding part 2. The

  In the present embodiment, the radial blades 1 are quickly manufactured from the yarn bundle 4 in a fixed position in this way. Specifically, opening, fixing, cutting of the outer diameter of the hair bundle 4, cutting of the outer ring at the center, and cutting of the inner side of the welding part are continuously performed at a fixed position, and in particular, opening of the yarn bundle 4 and annular welding of the center part. The removal of the inside of the welded portion is performed simultaneously by the welding head 5. Therefore, the radial blades 1 are manufactured from the hair bundle 4 with high efficiency.

  The radial blade 1 manufactured on the processing bed 6 is separated from the hair bundle 4 by removing the inside of the welded portion 2. The tip of the remaining hair bundle 4 is excessively fixed by welding. When the welding head 5 and the thread presser 9 are raised to their original positions, as shown in FIG. 5, the thread bundle 4 is pushed up by about 2 mm, for example, by another thread raising chuck 8, and the excessive welding part 12 at the tip is moved in the horizontal direction. It is removed by the cutter 11. Thereby, the front-end | tip part of the yarn bundle 4 is separated, and it prepares for manufacture of the next radial blade | wing. The cut excess welded portion 12 is sucked by the air blow 13 provided on the side. When the welding head 5 and the thread retainer 9 are raised to their original positions, the manufactured radial blades 1 are also released and sucked by the air blow 13.

  By repeating this, the radial blades 1 are continuously produced from the hair bundle 4 with high efficiency. The manufactured radial blade 1 is assembled into a 360-degree toothbrush as follows.

  First, as shown in FIG. 6, the brush handle 14 is vertically supported with its tip portion down. And the manufactured radial blade | wing 1 is engage | inserted by the predetermined number order from the downward direction to the small diameter blade | wing support part formed in the front-end | tip part of the brush handle 14. FIG. At this time, the radial blade 1 is held in a posture in which the annular protrusion 3 formed on the annular welded portion 2 faces downward. This insertion is performed manually or by an automatic machine (not shown). In order to prevent the inserted radial blade 1 from being removed in the middle, a tip portion of about 3 mm of the blade support portion is processed to be about 0.1 mm in diameter.

  When a predetermined number of radial blades 1 are inserted into the tip of the brush handle 14, the brush handle 14 is sent to the next process by the conveyor. In this step, as shown in FIG. 7, the brush handle 14 is set downward on the welder 15, and the welder 15 is raised by the air cylinder and pressed against the tip surface of the brush handle 14, thereby The neighborhood is processed thick. Thus, a predetermined number of radial blades 1 are fixed to the tip of the brush handle 14, and a cylindrical brush head is formed. 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 radial blades 1 is completed, the brush handle 14 is further 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 is processed by a round tip processing machine 16. The round tip processing machine 16 is configured such that a No. 400 sand paper having a width of about 10 mm bonded to the surface of the No. 400 sand paper is fixed to the drum surface, and the drum is rotated by the drive motor 17. ing. Then, the outer peripheral surface of the brush head is brought into contact with the surface of the rotating processing machine 16, and the brush head is moved in the axial direction while rotating in this state. Thereby, each hair end in the brush head 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.

  A boss-like annular protrusion 3 is integrally formed on one surface of the disk-shaped welded portion 2 of the radial blade 1. For this reason, a predetermined clearance is ensured between the brush parts of the adjacent radial blade | wing 1 only by stacking the radial blade | wing 1 toward the same direction, without interposing a spacer between adjacent blade | wings. For this reason, in the cylindrical brush head, the hair density in the axial 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.

  Further, the annular protrusion 3 is formed at the same time as the formation of the welded portion 2, and no extra cost is required for formation. Therefore, this does not increase the product cost.

  The height of the boss portion formed of the annular protrusion 3 is preferably 0.1 to 0.4 mm. If this is too low, the hair density in the axial direction of the brush head will not be sufficiently reduced. On the other hand, if it is too high, the hair 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 assembly of the cylindrical brush head, since it is not necessary to use a spacer, an increase in the number of parts is avoided, and the manufacturing process is greatly streamlined. 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 1 and the spacers is very inefficient and the time loss is enormous. By inserting only the radial blades 1, the assembly time is halved, and mass production and product price are greatly reduced.

  In the production of the radial blade 1, from the supply of the yarn bundle 4 to the release to the radial shape, fixing, welding of the central portion, removal of the inner side of the welding portion, and further removal of the excess welding portion 12 of the hair bundle 4 at a fixed position. Do it continuously. In particular, the yarn bundle 4 is opened, the center is welded, and the inside of the welded portion is removed by the welding head 5 in one tool and one process. For this reason, while being excellent in productivity of the radial blade | wing 1, a manufacturing apparatus also becomes cheap and it becomes possible to reduce the manufacturing cost of the radial blade | wing 1 significantly.

  As a result, a high-quality 360-degree toothbrush is economically manufactured and provided to the market at a low price.

  FIG. 9 is a cross-sectional view showing another example of radial blades.

  In the radial blade 1, annular protrusions 3 and 3 are provided on both surfaces of the annular welded portion 2. As a method of providing the annular projections 3 and 3 on both surfaces of the welded portion 2, an annular recess corresponding to the annular recess 6 </ b> C formed on the surface of the processing bed 6 is also formed on the annular tip weld surface 5 </ b> C of the welding head 5. That's fine. Thereby, simultaneously with formation of the welding part 2, the annular protrusions 3 and 3 can be formed in both surfaces.

  In the cylindrical brush head formed by overlapping the radial blades 1, the annular protrusions 3, 3 facing each other between the adjacent radial blades 1, 1 are overlapped to form a spacer, whereby the hair density in the axial direction is increased. Decreases. In this case, the height of the annular protrusion 3 may be ½ that when the annular protrusion 3 is provided on one side.

  FIG. 10 is a front view showing another example of radial blades.

  In the radial blade 1, a long thread material and a short thread material are mixed. More specifically, a large number of thread members 40 extending radially from the annular welded portion 2 to the outer peripheral side have a structure in which long thread members 41 and short thread members 42 are combined. On the surface of the welded portion 2, a boss portion made of an annular protrusion 3 is formed as with the other radial blades 1.

  Such a radial blade | wing 1 can be manufactured as follows, for example. When manufacturing the radial blade 1 on the processing bed 6, the yarn bundle 4 is exposed on the processing bed 6 for a predetermined length. At this time, about half of the thread material is exposed from the processing bed 6 for a long time, and the rest Is briefly exposed from the processing bed 6. Then, processing is performed on the yarn bundle 4 in which both are randomly mixed. Thereby, the radial blade | wing 1 in which the thread material from which length differs in the brush part which a large number of thread materials spread radially is manufactured.

  When a brush head is formed by such radial blades 1, the 360-degree toothbrush has particularly good bristles between the teeth and the back side of the final molar.

  FIG. 11 is a front view showing still another example of radial blades.

  In the radial blade 1, a thick and long thread material and a thin and short thread material are mixed. More specifically, a large number of thread members 40 extending radially from the annular welded portion 2 to the outer peripheral side have a structure in which a thick and long thread member 43 and a thin and short thread member 44 are combined. On the surface of the welded portion 2, a boss portion made of an annular protrusion 3 is formed as with the other radial blades 1.

  Such a radial blade | wing 1 can be manufactured as follows, for example. When manufacturing the radial blade 1 on the processing bed 6, the thread bundle 4 is exposed on the processing bed 6 for a predetermined length. At this time, the thread bundle 4 is a mixture of a thick thread material and a thin thread material. The thick thread material is exposed for a long time from the processing bed 6, and the thin thread material is exposed for a short time from the processing bed 6. Then, processing is performed on the yarn bundle 4 in which both are randomly mixed. Thereby, the radial blade | wing 1 with which the thread material from which thickness and length differ was mixed in the brush part which many yarn materials spread to radiation is manufactured.

  When a brush head is formed with such a radial blade 1, the 360-degree toothbrush has particularly good brushing ability between the teeth and the back side of the final molar, and has excellent brushing ability. The hit is soft and an excellent massage effect is obtained. This is because the long thread material reaching between the teeth and the back side of the final molar is hard, and the short thread material hitting the gums and the oral cavity is soft. Further, by using a thick thread material and a thin thread material in combination, it is possible to adjust the hardness of the brush according to the condition of the oral cavity and gums.

  FIG. 12 is an external view of a brush showing another example of a 360-degree toothbrush.

  This 360 degree toothbrush has a brush head in which two types of radial blades 1A and 1B are combined. One radial blade 1A is a large-diameter blade with a long yarn material that radiates radially from the annular welded portion, and the other is a small-diameter blade with a short yarn material. By alternately combining the large-diameter radial blades 1A and the small-diameter radial blades 1B, the brush head has a mixture of thread materials of different lengths, and the tips of the hairs reach well between the teeth and the back side of the final molar. Become a thing.

  FIG. 13 is a brush external view showing still another example of the 360-degree toothbrush.

  This 360 degree toothbrush has a brush head in which two types of radial blades 1C and 1D are combined. One radial blade 1C is a hard blade using a thick thread material, and the other is a soft blade using a thin thread material. By alternately combining the hard radial blade 1C and the soft radial blade 1D, the brush head has a mixture of different thread materials, and the hardness of the brush can be adjusted to match the condition of the oral cavity and gums. Is possible. For example, when the gums are weak due to gingivitis, periodontal disease, etc., the hardness can be adjusted accordingly.

  FIG. 14 is an external view of a brush showing still another example of a 360-degree toothbrush.

  This 360 degree toothbrush has a brush head in which two types of radial blades 1E and 1F are combined. One radial blade 1E is a large-diameter / hard blade using a thick and long thread material, and the other is a small-diameter / soft blade using a thin and short thread material. By constructing a brush head by alternately combining these, the brush head has a particularly good hair tip between the teeth, the back side of the final molar, etc., and has an excellent massage effect on the gums and oral cavity. . This is because the long thread material reaching between the teeth and the back side of the final molar is hard, and the short thread material hitting the gums and the oral cavity is soft. Further, by using a thick thread material and a thin thread material in combination, it is possible to adjust the hardness of the brush according to the condition of the oral cavity and gums.

  FIG. 15 is an external view of a brush showing still another example of a 360-degree toothbrush.

  In this 360-degree toothbrush, a cylindrical brush head configured by overlapping radial blades 1 is formed in a tapered shape whose outer diameter gradually decreases from the proximal end portion toward the distal end portion. Such a brush head can be formed at the final outer surface cutting stage. And it can be brushed accurately to the last molar, and it is effective for pets if the diameter of the thread material is increased.

  Here, the thickness of the thread material and the blade diameter in the radial blade of the present invention 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.

  16 to 18 show a 360-degree toothbrush automatic manufacturing facility, FIG. 16 shows a brush handle supply device, FIG. 17 shows a radial blade manufacturing / stacking device, and FIG. 18 shows a radial blade fixing device.

  This 360-degree toothbrush manufacturing facility includes a brush handle supply device shown in FIG. 16, a radial blade manufacturing / laminating device shown in FIG. 17, and a radial blade fixing device shown in FIG.

  The brush handle supply device (FIG. 16) has a supply robot 21. The supply robot 21 has a rotation axis 22 perpendicular to a position eccentric from the revolution center. The rotation shaft 22 is equipped with a plurality of supply arms 23 at the lower end. The supply robot 21 moves the plurality of supply arms 23 to the brush supply unit 24 by revolving motion, and simultaneously clamps the plurality of brush handles 14 by the plurality of supply arms 23, and then at the radial blade manufacturing and laminating apparatus. Returning here, the plurality of supply arms 23 are rotated to pass the plurality of brush handles 14 to a plurality of manufacturing / laminating apparatuses.

  The individual radial blade manufacturing and laminating apparatus (FIG. 17) has a horizontal rotary table 25. The rotary table 25 is set on a bracket 26 and is driven to rotate by a lower drive body 27. Two processing beds 6 and 6 are attached to the surface of the rotary table 25 with the rotation center therebetween. The two processing beds 6 and 6 are circulated between the blade manufacturing position and the blade stacking position by the rotation of the rotary table 25. At the blade manufacturing position, the welding head 5 and the lifting chuck 28 are provided with the rotary table 25 interposed therebetween, and at the blade stacking position, a handle clamp 29 is provided above the rotary table 25. The handle clamp 29 lifts and lowers the brush handle 14 delivered from the above-described brush handle supply device by chucking the tip of the brush handle 14 downward.

  In operation, the radial blade 1 is manufactured from the hair bundle 4 at the blade manufacturing position. The manufacturing method is substantially the same as the above-described method. After the hair bundle 4 is exposed on the processing bed 6 for a predetermined length by the lifting chuck 28, the welding head 5 descends and the radial blades with bosses on the processing bed 6. 1 is manufactured. When the radial blade 1 is manufactured on the processing bed 6 at the blade manufacturing position, the bristles 4 penetrating the rotary table 25 and the processing bed 6 are once pulled down to the descending point indicated by 4B. Then, the rotary table 25 rotates until the processing bed 6 moves to the blade stacking position. At this time, the manufactured radial blade 1 is placed on the processing bed 6, and the boss portion (annular protrusion 3) formed on the lower surface of the welded portion 2 contributes to positioning and fixing of the radial blade 1 and stability improvement. .

  When the radial blade 1 is conveyed to the blade stacking position, the handle clamp 29 is lowered, and the tip end portion of the brush handle 14 held by the radial blade 1 is inserted into the radial blade 1 on the processing bed 6. When this is finished, the rotary table 25 rotates again, the processing bed 6 is returned from the blade stacking position to the blade manufacturing position, and the radial blade 1 manufactured from the blade manufacturing position to the blade stacking position is conveyed. By repeating this, a predetermined number of radial blades 1 are fitted into the brush handle 14.

  When a predetermined number of radial blades 1 are fitted into the brush handle 14 at the blade stacking position at the blade manufacturing position, the brush handle 14 is transferred to the radial blade fixing device (FIG. 18). Specifically, the brush handle 14 is transferred to the lifting chuck 30 of the fixing device. The lifting chuck 30 holds the brush handle 14 after the radial blades 1 have been mounted, with the tip portion thereof facing down, and is driven up and down by a cylinder 31. A welding table 32 is provided beside the cylinder 31, and a welding machine 15 is attached to the welding table 32. Then, as the elevating chuck 30 is lowered, the tip surface of the brush handle 14 is pressed against the lower welding machine 15, and the vicinity of the tip surface is processed to be thick, whereby a predetermined number of radial blades 1 are formed on the tip of the brush handle 14. Is fixed.

  By repeating this series of steps, a 360-degree toothbrush having a cylindrical brush head with a predetermined number of radial blades 1 stacked at the tip is fully automated and highly efficient.

  A cylindrical brush head formed by overlapping a predetermined number of radial blades 1 can be integrated by forming a boss on the inner peripheral surface by welding. If this boss-type integrated cylindrical brush head is configured to be inserted into the tip of the brush handle, a head replacement type 360-degree toothbrush is configured.

  An antibacterial toothbrush is formed by kneading an abrasive material having an antibacterial action into a thread material to produce a radial blade.

  The boss-type integrated cylindrical brush head has a very high strength. The result of the tensile test is shown in Table 1 in comparison with each case of a normal flocking rotary brush and a radial blade with a boss. The radial blades with bosses are also sufficiently strong, but the boss-type integrated cylindrical brush head is much stronger.

FIG. 1 is an external view of a 360-degree toothbrush showing an embodiment of the present invention.
[FIG. 2] It is the front view and AA sectional drawing of the radial blade | wing currently used for the 360 degree type toothbrush.
[FIG. 3] An opening process is shown in an explanatory view of the manufacturing method and manufacturing apparatus of the radial blade.
[FIG. 4] An explanatory view of the manufacturing method and manufacturing apparatus of the radial blades shows a welding removal step.
FIG. 5 is an explanatory view of the radial blade manufacturing method and manufacturing apparatus, and shows a process for removing excess welds.
[FIG. 6] It is explanatory drawing of the method of manufacturing a 360 degree type toothbrush using the same radial blade | wing, and shows the fitting process of a radial blade | wing.
[FIG. 7] It is explanatory drawing of the method of manufacturing a 360 degree type toothbrush using the radial blade | wing, and shows the fixing process of the fitted radial blade | wing.
[FIG. 8] It is explanatory drawing of the method of manufacturing a 360 degree type toothbrush using the radial blade | wing, and shows the grinding | polishing process of a brush head.
FIG. 9 is a cross-sectional view showing another example of radial blades.
FIG. 10 is a front view showing still another example of radial blades.
FIG. 11 is a front view showing still another example of radial blades.
FIG. 12 is a brush external view showing another example of a 360-degree toothbrush.
FIG. 13 is an external view of a brush showing still another example of a 360-degree toothbrush.
FIG. 14 is a brush external view showing still another example of a 360-degree toothbrush.
FIG. 15 is a brush external view showing still another example of a 360-degree toothbrush.
FIG. 16 is a configuration diagram of a 360-degree toothbrush automatic manufacturing facility (brush handle supply device).
FIG. 17 is a configuration diagram of a 360-degree toothbrush automatic manufacturing facility (radial blade manufacturing / laminating apparatus).
FIG. 18 is a configuration diagram of a 360-degree toothbrush automatic manufacturing facility (radial blade fixing device).
[FIG. 19] It is explanatory drawing of the manufacturing apparatus of the conventional radial blade | wing.
FIG. 20 is an explanatory view of a manufacturing method using a conventional apparatus and shows an opening process.
FIG. 21 is an explanatory view of a manufacturing method using a conventional apparatus and shows an opening process.
[FIG. 22] An explanatory view of a manufacturing method using a conventional apparatus, showing a welding process.
FIG. 23 is an explanatory diagram of a manufacturing method using a conventional apparatus, and shows a removal step.

Claims (8)

  A through hole through which the tip of the brush handle penetrates is provided at the center, an annular welded portion is provided around the through hole, and a large number of yarn materials radially extend from the welded portion to the outer peripheral side. A radial vane for a toothbrush, wherein the radial vane has a protrusion integrally formed on one surface or both surfaces of the welded portion.   The radial blade for a toothbrush according to claim 1, wherein the protrusion is an annular protrusion that is continuous in a circumferential direction.   The radial blade for a toothbrush according to claim 1, wherein the protrusion is a plurality of protrusion groups provided intermittently in a circumferential direction.   The radial blade for a toothbrush according to claim 1, wherein a long yarn material and a short yarn material are mixed in a brush portion in which a large number of yarn materials extend radially from an annular welded portion.   The radial blade for a toothbrush according to claim 1, wherein a thread material having a large diameter and a thread material having a small diameter are mixed in a brush portion in which a large number of thread materials extend radially from the annular welded portion.   A 360-degree toothbrush comprising a tip of a brush handle equipped with a cylindrical radial brush head formed by superimposing a plurality of radial blades according to any one of claims 1 to 5.   The 360-degree toothbrush according to claim 6, wherein the radial brush head has a configuration in which hard radial blades having a large yarn diameter and soft annular blades having a small yarn diameter are mixed.   The 360-degree toothbrush according to claim 6, wherein the radial brush head has a configuration in which a large-diameter radial blade having a long yarn length in the brush portion and a small-diameter radial blade having a short yarn length in the brush portion are mixed.

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