JP2014117686A - Application brush for projection and application method for the same - Google Patents

Abstract

An object of the present invention is to make it possible to apply a predetermined range, which is determined based on projections such as bolts and nuts, appropriately and easily using a coating material such as a sealant in accordance with specifications.
A protrusion application brush according to an embodiment includes a brush and a rotation shaft. The brush applies an application material to an application target to which a bolt and a nut fastened to the bolt are attached, at least in the range of an annulus shape centering on the head of the bolt or the nut. The rotating shaft rotates the brush. In addition, the brush has a plurality of hairs implanted around the gap portion for avoiding interference with the bolt head or the nut so as to cover the range of the annulus shape when the brush is rotated. Configured.
[Selection] Figure 5

Description

  Embodiments described herein relate generally to a protrusion application brush and a protrusion application method.

  Conventionally, a sealant is applied to a predetermined range on a head side and a nut side of a bolt that joins parts such as a fuel tank of an aircraft. Since the time required for the sealant to cure is short, it is necessary to apply the sealant in a short time.

  On the other hand, various painting tools for painting bolts and nuts themselves have been proposed. As specific examples, there have been proposed coating tools in which brushes are integrated into a cylindrical container so that a bolt with a tightened nut can be painted efficiently (for example, Patent Document 1, Patent Document 2, Patent Document 3, and Patent Document). 4).

JP 2006-102725 A JP 2004-16305 A Japanese Utility Model Publication No. 6-14834 JP 2001-46150 A

  The number of bolts for joining aircraft parts is very large, and there are various conditions for applying sealant to parts including bolts. That is, the range in which the sealant is to be applied is determined as a design specification according to the type of bolt. Specifically, the sealant must be applied within a circular range of a predetermined size centered on the bolt head and nut.

  Therefore, conventionally, the work of applying the sealant is a manual work with a brush. Moreover, the application of the sealant is an operation requiring skill. In particular, in addition to the skill of applying the sealant to the exact range defined by the design specifications, the skill of applying the sealant uniformly to the three-dimensional parts such as the heads and nuts of the bolts is required. If these skills are insufficient, there may be problems such as coating unevenness such as sealant accumulation and peeling after the sealant is cured. In such a case, repair work may occur in order to satisfy quality requirements.

  Such a problem is not limited to the operation of applying the sealant to the bolts and nuts, but also applies to the operation of applying a coating material such as a primer or a paint to the protrusions.

  Accordingly, an object of the present invention is to allow a predetermined range determined based on a protrusion such as a bolt or nut to be applied appropriately and easily with a coating material such as a sealant according to the specification.

The projection application brush according to the embodiment of the present invention includes a brush and a rotation shaft. The brush applies an application material to an application target to which a bolt and a nut fastened to the bolt are attached, at least in the range of an annulus shape centering on the head of the bolt or the nut. The rotating shaft rotates the brush. In addition, the brush has a plurality of hairs implanted around the gap portion for avoiding interference with the bolt head or the nut so as to cover the range of the annulus shape when the brush is rotated. Configured.
In addition, the method for applying a protrusion according to an embodiment of the present invention includes a step of attaching an application material to the plurality of hairs planted on the application brush for protrusions, and the gap portion of the application brush for protrusions Inserting a bolt head or the nut to bring at least a part of the plurality of hairs into contact with the application object; and rotating the protrusion application brush to apply the application object to which the application material has been applied. Manufacturing steps.

  According to the protrusion application brush and the protrusion application method according to the embodiment of the present invention, the predetermined range determined based on the protrusions such as bolts and nuts can be appropriately and easily applied according to the specification with the application material such as sealant. Can be applied.

The perspective view of the application brush for bolt heads concerning the embodiment of the present invention. The front view of the application brush for bolt heads shown in FIG. The bottom view of the application brush for bolt heads shown in FIG. The side view of the application brush for bolt heads shown in FIG. The perspective view which looked at the application brush for bolt heads shown in Drawing 1 from the lower part. The perspective view which shows the structure of the application brush for nuts concerning embodiment of this invention. The front view of the application brush for nuts shown in FIG. The bottom view of the application brush for nuts in the state which removed the vertical brush shown in FIG. The side view of the application brush for nuts shown in FIG. The perspective view which looked at the application brush for nuts in the state which removed the vertical brush shown in FIG. The figure which looked at the vertical brush shown in FIG. 1 from the brush side. The figure explaining the application method of the sealant using the application brush for bolt heads shown in FIG. The figure explaining the application | coating method of the sealant using the application brush for nuts shown in FIG.

  A protrusion application brush and a protrusion application method according to an embodiment of the present invention will be described with reference to the accompanying drawings.

(Configuration and function)
1 is a perspective view of a bolt head application brush according to an embodiment of the present invention, FIG. 2 is a front view of the bolt head application brush shown in FIG. 1, and FIG. 3 is a bottom view of the bolt head application brush shown in FIG. 4 is a side view of the bolt head application brush shown in FIG. 1, and FIG. 5 is a perspective view of the bolt head application brush shown in FIG.

  The bolt head application brush 1 is an instrument for applying an application material to an application target to which a bolt 2 and a nut fastened to the bolt 2 are attached. Hereinafter, a case where a sealant is applied to the aircraft body 4 as an application target will be described as an example. Note that coating materials such as paints and primers can be similarly applied to the application target.

  In the aircraft body 4, a part 4 </ b> A to which the bolt 2 and the nut are tightened is a sealant application region A. Specifically, the inside of a circle centering on the head 2A and the nut of the bolt 2 is defined as the sealant application area A. Accordingly, if the sealant application area A is on the bolt head 2A side, the sealant application area A is in the range of an annulus shape around the bolt head 2A itself and the bolt 2 of the component 4A to which the bolt 2 is tightened. The range of the annulus shape can also be expressed as a donut shape or a torus surface. On the other hand, on the nut side, the range of the annulus shape centering on the bolt 2 of the part 4A to which the nut itself and the nut are tightened is the sealant application region A. If the portion to which the bolt 2 is tightened is a flat surface, the range of the annulus shape is also a flat surface. If the portion to which the bolt 2 is tightened is a curved surface, the range of the annulus shape is also a curved surface.

  The bolt head application brush 1 is a tool for applying a sealant to the machine body 4 from the bolt head 2A side. Specifically, the bolt head application brush 1 is configured by attaching a brush 6 to a rotating shaft 5. That is, the brush 6 can be rotated by rotating the rotating shaft 5. In the illustrated example, a hexagonal rotating shaft 5 is used as the rotating shaft 5 so that it can be attached to and detached from a hand tool such as a pneumatic hand drill or the head of a machine tool.

  The brush 6 is a main body part for applying a sealant as an application material from the bolt head 2 </ b> A side to the machine body 4 to be applied. Therefore, the brush 6 is configured so that the sealant can be applied to at least an annulus-shaped range centering on the head 2 </ b> A of the bolt 2. Specifically, the brush 6 has a plurality of bristles 8 around the gap portion 7 for avoiding interference with the head 2A of the bolt 2 so as to cover the range of the annulus shape when the brush 6 is rotated. It is composed by flocking.

  In the illustrated example, the brush 6 is configured by fitting a rectangular plate 9 in which a plurality of bristles 8 are implanted into a box-shaped rotating body 10. For this reason, the portion of the hair 8 of the brush 6 can be easily replaced. Thus, even when the sealant remains attached to the hair 8 after the sealant is applied, the portion of the hair 8 can be quickly replaced and the bolt head application brush 1 can be reused. That is, the trouble of the cleaning work in the state where the hair 8 is attached to the brush 6 can be avoided.

  The flocking pattern of the plurality of hairs 8 constituting the brush 6 is preferably cross-stitched (staggered). By interposing a plurality of hairs 8 on the plate 9 in a cross stitch shape, the gaps between the hairs 8 can be reduced as much as possible and can be made uniform. Thereby, the occurrence of uneven application of the sealant can be prevented, and the sealant can be applied more uniformly.

  As the material of the bristles 8 constituting the brush 6, non-metallic bristles made of natural materials or artificial materials are suitable. In particular, pig hair and horse hair are suitable for the hair 8 for the brush 6. In addition, in FIG. 3, the interval P1 between the hairs 8 arranged on a straight line is 3.2 mm, the interval P2 between the arrangement lines of the plurality of hairs 8 arranged on the straight line is 2.5 mm, and a pig hair having a diameter of 2 mm is used. A cross-stitched brush 6 was actually produced. That is, a cross-stitched brush 6 in which pig hairs having a diameter of 2 mm arranged in a straight line at intervals of 3.2 mm and flocked in multiple rows at intervals of 2.5 mm was manufactured.

  In order to apply the sealant to the range of the annulus shape of the machine body 4 by rotating the brush 6, the outer diameter D of the range of the annulus shape that becomes the locus of the flocked region when the brush 6 is rotated is at least the application region of the sealant. It is necessary to make the outer diameter of A or larger. Preferably, the flocked area is determined such that the maximum distance from the central axis of the flocked area of the brush 6 is about 0.5 mm to 1 mm longer than the radius of the sealant application area A defined as a specification. In other words, the outer diameter D of the annulus shape range obtained as a locus when the flocked region of the brush 6 is rotated is made 1 mm to 2 mm longer than the outer diameter of the annulus shape range to be the sealant application region A. It is desirable.

  Thus, even if the hair 8 is bent by rotating the brush 6 and the hair 8 is separated from the body 4 by increasing the size of the region that becomes the locus of the flocked region rather than the application region A of the sealant, the specification A sealant can be applied to the street application area A.

  Further, as described above, the brush 6 is provided with the gap portion 7 for avoiding interference with the head 2A of the bolt 2. Accordingly, the length of the flocked region or hair 8 is determined so that the head 2A of the bolt 2 can be inserted. For example, the bristles 8 can be prevented from being implanted in a circular range centered on the rotation axis 5 of the brush 6 and having a diameter equal to or larger than the diameter of the head 2A of the bolt 2. That is, it is possible to exclude a portion where the head 2A of the bolt 2 is inserted from the flocked region.

  However, as shown in the figure, if the hair 8 having a shorter length than the other part is implanted in the portion where the head 2A of the bolt 2 is inserted, the head 2A of the bolt 2 is rotated by the rotation of the brush 6. Also, a sealant can be applied. In that case, when the hair 8 for applying the sealant is brought into contact with the range of the annulus shape of the airframe 4 to which the bolt 2 is attached, the hair 8 for applying the sealant to the head 2A of the bolt 2 is the bolt. It is important to determine the length of the hair 8 so that it contacts the two heads 2A.

  When the length of the bristles 8 is shortened, the flexibility of the bristles 8 is reduced, and the load to be applied to the brush 6 in order to apply the sealant increases. Moreover, the amount of the sealant that can be impregnated in the brush 6 decreases as the length of the bristles 8 becomes shorter. On the contrary, if the length of the hair 8 is too long, the sealant may be excessively impregnated in the hair 8 or the hair 8 may be excessively bent.

  For this reason, it is appropriate that the length L1 of the hair 8 for applying the sealant to the range of the annulus shape of the body 4 is 14 mm or more and 16 mm or less. In particular, the length L1 of the bristles 8 for applying the sealant in the range of the annulus shape is more preferably 15 mm. That is, an appropriate amount of bending and an amount of sealant impregnation can be obtained by implanting bristles 8 having a length L1 of 14 mm to 16 mm, particularly 15 mm.

  The length of the hair 8 for applying the sealant to the head 2A of the bolt 2 is the height of the head 2A of the bolt 2 than the length of the hair 8 for applying the sealant to the range of the annulus shape of the fuselage 4. Shorter. As a result, in the illustrated example, the bristles 8 near the center corresponding to the head 2A of the bolt 2 are relatively short, and the bristles 8 on both sides corresponding to the range of the annulus shape are relatively long. That is, the rectangular hair transplantation region is divided into three regions, and the length of the hair 8 to be planted in the central region is shorter than the length of the hairs 8 on both sides.

  However, the present invention is not limited to the example shown in the figure, and when the brush 6 is rotated, an arbitrary flocked region and the length of the bristles 8 are determined so that the bristles 8 are in contact with the head 2A of the bolt 2 and the annulus shape range. can do. For example, three or more point-symmetrical flocked regions may be provided so that the bristles 8 are in contact with the range of the annulus shape, or a continuous annulus shaped flocked region may be provided.

  It should be noted that the hair transplantation region of the hair 8 for applying the sealant to the range of the annulus shape is provided so as to overlap the head 2A of the bolt 2 or within the range of the annulus shape according to the contour of the head 2A of the bolt 2. When the boundary of the flocked region of the hair 8 for applying the sealant is determined, the sealant can be satisfactorily applied to the portion where the head 2A of the bolt 2 and the surface of the machine body 4 are in contact with each other. For example, in the illustrated example, it is preferable that the width of the central flocked region is equal to or smaller than the diameter of the head 2A of the bolt 2.

  Further, the brush 6 is preferably provided with a first guide for positioning to prevent the positional deviation of the brush 6 with respect to the sealant application area A and a second guide for positioning in the pressing direction of the brush 6. It is. In the illustrated example, two positioning plates 11 that also serve as first and second guides are attached to the brush 6.

  The two positioning plates 11 are connected to both sides of the box-shaped rotating body 10 with two shafts 12 facing each other. That is, the two shafts 12 are inserted into two through holes penetrating the two positioning plates 11 and the rotating body 10, and both ends of the shaft 12 are tightened by the set screws 13. Thereby, each positioning plate 11 is fixed to both sides of the rotating body 10.

  Each positioning plate 11 can be made of an arbitrary material in the same manner as the rotating body 10. For example, if the positioning plate 11 is made of a resin such as polyacetal (polyoxymethylene), the positioning plate 11 having various shapes can be easily manufactured.

  Concave portions 11 </ b> A that face each other are formed on the rotating body 10 side of the portion protruding from the rotating body 10 of each positioning plate 11 toward the bristles 8. The two opposing recesses 11A have a shape of a part of the inner surface of the cylinder so as to fit the head 2A of the bolt 2. For this reason, the head 2 </ b> A of the bolt 2 can be rotatably inserted in a state where an appropriate gap is provided between the two positioning plates 11. That is, the head 2 </ b> A of the bolt 2 can be rotatably fitted to the two positioning plates 11 as the first guide by gap fitting.

  Thereby, the brush 6 can be positioned by the two positioning plates 11 around the central axis of the bolt 2. As a result, the positional deviation of the brush 6 in the direction perpendicular to the rotation shaft 5 can be prevented. Further, during the rotation of the brush 6, it is possible to suppress the shake of the brush 6. For this reason, the sealant can be more accurately applied to the range of the annulus shape.

  A planar or linear flat portion 11B is provided on the hair 8 side of each positioning plate 11. However, the flat portion 11B of each positioning plate 11 is provided so as to be on the same plane. Further, the flat portion 11B of each positioning plate 11 is located at a position where the bristles 8 of the brush 6 protrude by a predetermined length L2 toward the sealant application target side rather than the flat portion 11B of each positioning plate 11. Is provided.

  Thereby, the two positioning plates 11 function as a second guide for making the lengths of the plurality of hairs 8 pressed against the application target uniform by contacting the sealant application target. In this case, a plurality of bristles 8 for applying the sealant to the annulus shape range from the two positioning plates 11 as the second guides have a length L2 in the range of 1 mm to 2 mm in the axial direction of the rotary shaft 5. It is preferable to make it protrude by.

  As described above, when the planar second guide is provided on the brush 6 in addition to the circular first guide, the second guide can be pressed against the machine body 4. For this reason, the brush 6 can be rubbed against the application region A of the annulus sealant with a constant force. Thereby, a scrub effect is obtained and the bristles 8 of the brush 6 can be bent appropriately. As a result, unevenness of the sealant can be suppressed and adhesion can be improved.

  Next, the configuration and function of the protrusion application brush 6 for applying the sealant to the airframe 4 from the nut side will be described.

  6 is a perspective view showing the configuration of the nut application brush according to the embodiment of the present invention, FIG. 7 is a front view of the nut application brush shown in FIG. 6, and FIG. 8 is a state in which the vertical brush shown in FIG. 9 is a bottom view of the nut application brush, FIG. 9 is a side view of the nut application brush shown in FIG. 6, and FIG. 10 is a perspective view of the nut application brush as viewed from below with the vertical brush shown in FIG. 6 removed. 11 is the figure which looked at the vertical brush shown in FIG. 1 from the brush side.

  Similarly to the bolt head application brush 1, the nut application brush 20 can also be configured by attaching a rotating shaft 22 to the brush 21. Therefore, the characteristics of the nut application brush other than those described below are the same as the characteristics of the bolt head application brush 1.

  The brush 21 constituting the main body portion of the nut application brush 20 is configured to apply a sealant as an application material to at least an annulus-shaped range centering on the nut 2B. Therefore, the brush 21 is configured by implanting a plurality of hairs 24A around the gap portion 23 for avoiding interference with the nut 2B so as to cover the range of the annulus shape when the brush 21 is rotated. .

  In the illustrated example, the brush 21 is configured by fitting two rectangular plates 25 in which a plurality of hairs 24 </ b> A are implanted into a box-shaped rotating body 26. For this reason, the portion of the hair 24A of the brush 21 can be easily replaced. The brush 21 is formed with two flocked regions avoiding the gap 23 for inserting the nut 2B. However, the present invention is not limited to the illustrated example, and three or more flocked regions may be provided, or an annulus shaped flocked region may be provided on the brush 21.

  The nut application brush 20 can also be provided with a first guide for preventing the displacement of the brush 21 in the direction perpendicular to the rotation shaft 22 by being fitted to the nut 2B so as to be rotatable by fitting a gap. In addition, the brush 21 can be provided with a second guide for making the length of the plurality of hairs 24A pressed against the application target uniform by contacting the application target of the sealant.

  In the illustrated example, a concave portion 26 </ b> A having a shape of a part of the inner surface of a cylinder for holding the nut 2 </ b> B is provided in the central portion on the brush 21 side of the box-shaped rotating body 26. For this reason, the circular concave portion 26 </ b> A provided in the box-shaped rotating body 26 functions as a first guide for preventing the displacement of the brush 21 in the direction perpendicular to the rotating shaft 22.

  On the other hand, as a second guide for enabling the brush 21 to be rubbed with a certain force against the application area A of the annulus sealant, the same as the positioning plate 11 provided on the bolt head application brush 1. The brush 21 can be provided with two positioning plates 27 each having a planar or linear flat portion 27A on the bristles 24A side. Similar to the bolt head application brush 1, the two positioning plates 27 can be fixed to the box-shaped rotating body 26 by the shaft 28 and the set screw 29. The point that the tips of the hairs 24 </ b> A protrude from the two positioning plates 27 is the same as that of the bolt head application brush 1.

  Furthermore, it is preferable that the brush 21 of the nut application brush 20 is further planted with a plurality of hairs 24B for applying the sealant in contact with the nut 2B. Thereby, in addition to the application area A of the annulus-shaped sealant, it is possible to apply the sealant to the outer peripheral surface of the nut 2 </ b> B serving as a protrusion. In the illustrated example, a plurality of bristles 24B for applying a sealant to the nut 2B are planted on the surfaces of the two positioning plates 27 facing each other. Accordingly, the two positioning plates 27 also serve as a base plate for planting the hair 24B for applying the sealant to the nut 2B.

  The length L3 of the bristles 24B for the nut 2B is suitably 7 mm or more and 12 mm or less, and in particular, the length L3 of the bristles 24B for the nut 2B is suitably 10 mm. Accordingly, it is possible to obtain an appropriate bending amount of the hair 24B and an impregnation amount of the sealant.

  Furthermore, it is desirable to incline the length direction of the plurality of bristles 24B for applying the sealant to the nut 2B at an angle θ of 4 degrees or more and 6 degrees or less with respect to a plane perpendicular to the length direction of the bolt 2. In other words, if the length of the bristles 24B for the nut 2B is constant, the angle of the surface for planting the bristles 24B for the nut 2B is 4 degrees or more and 6 degrees or less with respect to the central axis of the nut 2B. It is preferable to incline at an angle θ. A more preferable inclination angle θ is 5 degrees.

  In the illustrated example, in order to incline the bristles 24B for the nut 2B having a constant length and provide the brush 21 with the bristles 24B, the two positioning plates 27 are inclined with respect to the central axis of the nut 2B. 26 is fixed. Therefore, the two side surfaces of the rotating body 26 that are in contact with the two positioning plates 27 are also tapered.

  When the bristles 24B for the nut 2B are tilted in this way, the bristles 24B for the nut 2B and the bristles 24A for the annulus-shaped application region A cooperate with each other, near the seat surface of the nut 2B and the center of the nut 2B. The bristles 24A and 24B of the brush 21 reach the part. For this reason, it is possible to apply the sealant without causing the sealant to remain uncoated by inclining the bristles 24B for the nut 2B at an appropriate angle. It has been confirmed that when the inclination angle of the bristles 24B for the nut 2B is excessively increased, the sealant cannot be properly applied.

  In addition, the brush 21 is provided with the centering function of the brush 21 by implanting the plurality of bristles 24B for applying the nut 2B in a plurality of different directions so as to be symmetrical with respect to the axis of the rotation shaft 22. Can do. That is, as shown in the figure, for example, if a flocking region of the bristles 24B for the nut 2B is provided so that the sealant is applied to the nut 2B from two directions, a plurality of bristles 24B that taper toward the axis of the rotary shaft 22 are provided. , The brush 21 can be centered with the nut 2B as a reference. That is, the bristles 24B for the nut 2B function as a guide for guiding the nut 2B into the centering portion at the rotation center of the brush 21 and the circular notch serving as the first guide.

  Then, by using the protrusion head application brush 1 such as the bolt head application brush 1 and the nut application brush 20 as described above, the machine body 4 to which the bolt 2 and the nut 2B are attached without requiring user skill. It becomes possible to perform a uniform sealant application operation on the surface. In addition, even in an environment where workability is poor, the protrusion application brush can be easily positioned by the guide mechanism.

(Operation and action)
Next, a sealant application method using the bolt head application brush 1 and the nut application brush 20 will be described.

  FIG. 12 is a view for explaining a sealant application method using the bolt head application brush 1 shown in FIG. 1. 12A and 12B, the illustration of the positioning plate 11 on the near side is omitted. In FIG. 12C, the bristles 8 of the brush 6 are not shown.

  First, the bolt head application brush 1 is attached to an electric drill. The electric drill to which the bolt head application brush 1 is attached is preferably an electric drill including a motor unit that can be rotated forward and backward from the viewpoint of effectively applying the sealant.

  Next, an appropriate amount of sealant is attached to the plurality of hairs 8 planted on the bolt head application brush 1. Subsequently, by inserting the head 2 </ b> A of the bolt 2 into the gap portion 7 of the bolt head application brush 1, at least a part of the plurality of hairs 8 is brought into contact with the portion of the body 4 to be applied.

  FIG. 12A shows a state before the head 2A of the bolt 2 is inserted into the gap portion 7 of the bolt head application brush 1. FIG. The bolt head application brush 1 is pressed from the state shown in FIG. 12A until the positioning plate 11 of the bolt head application brush 1 comes into close contact with the surface of the body 4. At this time, pressing the bolt head application brush 1 against the surface of the machine body 4 while rotating it manually leads to improved workability.

  When the head 2A of the bolt 2 is inserted into the gap portion 7 of the bolt head application brush 1, the electric drill is driven. For this reason, the bolt head application brush 1 rotates, and sealant is applied to the area of the surface of the machine body 4 in a circle around the head 2A of the bolt 2 and the head 2A of the bolt 2. The rotation speed of the electric drill and the bolt head application brush 1 is appropriately 200 to 300 rpm (round per minute).

  In addition, as shown in FIG. 12B, it is effective to rotate the electric drill forward or backward for about 1 to 3 seconds and then further reverse or forward about 1 to 3 seconds. That is, when the rotation direction of the bolt head application brush 1 is reversed, a good scrub effect can be obtained. In addition, as shown in FIG. 12C, the length of the hair 8 pressed against the surface of the machine body 4 by the positioning plate 11 of the bolt head application brush 1 is constant, and the center of the head 2A of the bolt 2 is the rotation of the brush 6. The bolt head application brush 1 is positioned so as to be in the center.

  For this reason, it is possible to avoid coating unevenness, and to obtain an accurate circular sealant application region A and good adhesion as specified. Then, the bolt head application brush 1 is retracted. Thereby, the airframe 4 including the aircraft part 4A can be manufactured as an application target to which the sealant is applied.

  FIG. 13 is a diagram for explaining a sealant application method using the nut application brush 20 shown in FIG. 6. 13A and 13C, the positioning plate 27 on the front side and the bristles 24B for the nut 2B are not shown. 13B and 13D, the hair 24A and the rotating body 26 for applying the sealant to the annulus-shaped application region A are not shown.

  The nut application brush 20 can also be handled in the same manner as the bolt head application brush 1. That is, as shown in FIGS. 13A and 13B, the nut 2B is inserted into the gap portion 23 of the nut application brush 20, and at least a part of the plurality of hairs 24A, 24B is brought into contact with the application object, so The sealant can be applied by rotating the application brush 20. Further, as shown in FIGS. 13C and 13D, the sealant can be effectively applied by reversing the rotation direction of the nut application brush 20. In particular, the slanted bristles 24B for the nut 2B can prevent the sealant from remaining on the contact portion R between the nut 2B and the machine body 4.

  In other words, the protrusion application brush as described above is provided with gap portions 7 and 23 in the vicinity of the rotation center for avoiding interference with the head 2A or the nut 2B of the bolt 2, and an annulus shape using a hand tool such as an electric drill. An application material such as a sealant can be applied to the application area A. Further, the protrusion application brush is provided with a first guide for positioning in the direction of the rotation surface and a second guide for making the pressing amount constant. Furthermore, about the nut application brush 20, the hair 24B for apply | coating an coating material to the nut 2B is planted.

(effect)
For this reason, according to the application brush for protrusion parts, an application material can be applied to the application region A according to the specification without requiring a user's skill level. That is, a predetermined range determined based on the protrusions such as the bolt 2 and the nut 2B can be appropriately and easily applied according to the specification with an application material such as a sealant. In particular, when a sealant is applied, it is possible to avoid the occurrence of unevenness and unpainted areas and obtain good adhesion.

(Other embodiments)
Although specific embodiments have been described above, the described embodiments are merely examples, and do not limit the scope of the invention. The novel methods and apparatus described herein can be implemented in a variety of other ways. Various omissions, substitutions, and changes can be made in the method and apparatus described herein without departing from the spirit of the invention. The appended claims and their equivalents include such various forms and modifications as are encompassed by the scope and spirit of the invention.

  For example, in the above-described embodiment, the protrusion application brush adapted to the bolt 2 and the nut 2B having a specific size is illustrated, but the gap portions 7 and 23 for avoiding interference according to the sizes of the bolt 2 and the nut 2B. You may be allowed to adjust the size. Similarly, the first guide for positioning can be adjusted in size according to the size of the head 2A of the bolt 2 or the nut 2B. In that case, components such as a portion forming the gap portions 7 and 23 or a positioning plate 11 forming the first guide or a portion forming the concave portion 26A of the rotating body 26 are moved by an adjusting mechanism such as a ball screw. What should I do?

  The protrusion application brush is not limited to a sealant, and can be used as a primer application brush or a paint brush for applying a primer or paint. Furthermore, the application brush for protrusions can be used as a cleaning brush for cleaning the periphery of the bolt 2 and the nut 2 </ b> B, not limited to the application for applying the application material.

DESCRIPTION OF SYMBOLS 1 Bolt head application brush 2 Bolt 2A Head 2B Nut 4 Airframe 4A Parts 5 Rotating shaft 6 Brush 7 Gap part 8 Bristle 9 Plate 10 Rotating body 11 Positioning plate 11A Recess 11B Flat part 12 Shaft 13 Set screw 20 Nut application brush 21 Brush 22 Rotating shaft 23 Gap portion 24A, 24B Bristles 25 Plate 26 Rotating body 26A Recessed portion 27 Positioning plate 27A Flat portion 28 Shaft 29 Set screw A Application area

Claims (10)

A brush for applying a coating material to a range of an annulus shape centered on at least a head of the bolt or the nut, to which a bolt and a nut to be fastened to the bolt are attached;
A rotation shaft for rotating the brush,
The brush is configured by implanting a plurality of bristles around the gap portion for avoiding interference with the head of the bolt or the nut so as to cover the range of the annulus shape when the brush is rotated. Applicable brush for protrusion.   The brush is provided with a first guide for preventing displacement of the brush in a direction perpendicular to the rotation axis by being fitted to the head of the bolt or the nut so as to be rotatable with a clearance fit. 2. The protrusion application brush according to 1.   The protrusion application according to claim 1, wherein the brush is provided with a second guide for making the lengths of the plurality of hairs pressed against the application target uniform by contacting the application target. brush.   The application brush for projection parts according to any one of claims 1 to 3, wherein a plurality of hairs for applying the application material in contact with the nut are further implanted on the brush.   5. The length direction of the plurality of hairs for applying the nut to the brush is inclined at an angle of 4 degrees or more and 6 degrees or less with respect to a plane perpendicular to the length direction of the bolt. Application brush for protrusions.   The brush can be centered by implanting the plurality of bristles for applying the nut on the brush in a plurality of different directions so as to be symmetrical with respect to the axis of the rotation shaft. 6. The protrusion application brush according to claim 5, configured as described above.   4. The protrusion application brush according to claim 3, wherein the second guide is configured to project the plurality of hairs with a length in a range of 1 mm to 2 mm in an axial direction of the rotation shaft.   The protrusion application brush according to any one of claims 1 to 7, wherein the plurality of hairs are planted in a cross-stitch shape on the brush. Attaching a coating material to the plurality of hairs planted in the projection application brush according to any one of claims 1 to 8,
Inserting the bolt head or the nut into the gap portion of the protrusion application brush to bring at least some of the plurality of hairs into contact with the application target; and
Producing the application object to which the application material is applied by rotating the protrusion application brush; and
A protrusion coating method comprising:   The projection part coating method according to claim 9, further comprising a step of reversing the rotation direction of the projection part application brush.

Images