JP2009082770A - Coating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a process required when the inner surface of a cylindrical article is coated. <P>SOLUTION: This coating apparatus 1 is used for coating the inner surface 101b of the cylindrical article 101 and equipped with two receiving rollers 11 and 12, a drive part 2 and a coating part 31. Both of the two receiving rollers 11 and 12 have rotary shafts 111 and 121 along the axis 90 of the cylindrical article 101 and come into contact with the outer surfaces 101a of the cylindrical article 101. The two receiving rollers 11 and 12 are positionally different from each other when looked from the direction set along the axis 90 of the cylindrical article 101. The drive part 2 comes into contact with the outer surface 101a of the cylindrical article 101 on the side opposite to two receiving rollers 11 and 12 to apply rotatory power to the cylindrical article 101. The coating part 31 is constituted so as to coat the inner surface 101b of the cylindrical article 101 with coating. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a coating apparatus, and more particularly to coating of an inner surface of a cylindrical object.

  2. Description of the Related Art Conventionally, a technique for coating an inner surface of a cylindrical member (hereinafter referred to as a “cylindrical object”) has been proposed. For example, Patent Document 1 listed below discloses a technique for forming a synthetic resin film on the inner surface of a cylindrical bearing.

Specifically, a cylindrical bearing is sandwiched between two semi-cylindrical jigs. Then, the bearing is fixed to the jig by connecting the two jigs with screws or the like. While rotating the jig while the bearing is fixed, a paint mainly composed of synthetic resin is sprayed on the inner surface of the bearing to form a synthetic resin film.
JP 2004-113974 A

  However, in the above-described conventional technique, it is necessary to fix the cylindrical object to the coating jig, so that the process is complicated. Moreover, when coating the inner surface of a cylindrical object having a different size (diameter), it is necessary to prepare a corresponding jig for each cylindrical object having a different size. For this reason, when painting the inner surface of the cylindrical object of several sizes, the problem that a process became complicated and the problem that cost increased had arisen.

  This invention is made | formed in view of the situation mentioned above, and it aims at simplifying the process required when coating the inner surface of a cylindrical object.

  A coating apparatus according to a first invention is an apparatus for coating an inner surface of a cylindrical object, and includes two receiving rollers, a drive unit, and an application unit. Each of the two receiving rollers has a rotation axis along the axis of the cylindrical object, and is in contact with the outer surface of the cylindrical object. The positions of the two receiving rollers are different from each other when viewed from the direction along the axis. The drive unit contacts the outer surface of the cylindrical object from the side opposite to the two receiving rollers, and applies a rotational force to the cylindrical object. The application unit applies the paint to the inner surface of the cylindrical object.

  A coating apparatus according to a second aspect of the present invention is the coating apparatus according to the first aspect of the present invention, wherein at least one of the drive unit and the two receiving rollers is movable and viewed from a direction along the axis. Sometimes, the distance from at least one of the other two can be changed.

  A coating apparatus according to a third aspect of the present invention is the coating apparatus according to the first or second aspect of the present invention, and the two receiving rollers are both made of metal and are located below the cylindrical object. The drive unit is movable, can change the distance from the receiving roller when viewed from the direction along the axis, and the surface in contact with the cylindrical object is formed of an elastic material.

  A coating apparatus according to a fourth aspect of the present invention is the coating apparatus according to any one of the first to third aspects, wherein the cylindrical object and the application part are relatively movable in a direction along the axis. .

  A coating apparatus according to a fifth aspect of the present invention is the coating apparatus according to the fourth aspect of the present invention, and the rotation axis is substantially parallel to the axis of the cylindrical object.

  A coating apparatus according to a sixth aspect of the present invention is the coating apparatus according to the fourth or fifth aspect of the present invention, further comprising a restricting portion. The restricting portion restricts the cylindrical object from moving along the axis.

  A coating apparatus according to a seventh aspect of the present invention is the coating apparatus according to the fourth aspect of the present invention, wherein the two receiving rollers when viewed from the drive unit side are arranged such that their rotation shafts draw a letter C. ing.

  A coating apparatus according to an eighth aspect of the present invention is the coating apparatus according to any one of the first to seventh aspects, wherein the application unit has a discharge unit and a spatula. The discharge unit discharges the paint onto the inner surface of the cylindrical object. The spatula stretches the paint discharged on the inner surface.

  According to the coating apparatus concerning 1st invention, the inner surface of a cylindrical object can be painted, rotating a cylindrical object only by supporting a cylindrical object with a drive part and two receiving rollers. Therefore, a process required when painting the inner surface of a cylindrical object can be simplified.

  Moreover, since the drive unit and the two receiving rollers are in contact with the outer surface of the cylindrical object, the cylindrical object can be rotated with the cylindrical object supported at three points. Therefore, the center of rotation of the cylindrical object is difficult to shift during painting, and the film formed by painting can be made uniform easily.

  According to the coating apparatus concerning 2nd invention, application to the cylindrical object of various sizes (diameter) is easy.

  According to the coating apparatus according to the third aspect of the present invention, after the cylindrical object is placed on the two receiving rollers located on the lower side, the drive unit can be moved downward to support the cylindrical object. At this time, since the receiving rollers are all made of metal, the center of rotation of the cylindrical object does not deviate even if the cylindrical object is pushed by the drive unit from above when sandwiching the cylindrical object. Therefore, if the application portion is positioned with respect to a cylinder having a certain diameter, then it is not necessary to position the application portion with respect to a cylinder having the same diameter, thereby simplifying the coating process. The

  According to the coating apparatus concerning 4th invention, a coating material can be apply | coated to the whole inner surface of a cylindrical object.

  According to the coating apparatus concerning 5th and 6th invention, a cylindrical object can be rotated in a predetermined position.

  According to the coating apparatus concerning 7th invention, a cylindrical object can be moved to the direction in alignment with an axis | shaft. Therefore, the inner surface of the cylindrical object can be painted while the application part is fixed at a predetermined position.

  According to the coating apparatus of the eighth invention, it is easy to uniformly apply the paint to the inner surface of the cylindrical object.

  FIG.1 and FIG.2 is a figure which shows notionally the coating apparatus 1 concerning embodiment of this invention. In FIG. 1, the side surface of the coating apparatus 1 viewed from the direction along the axis 90 of the cylindrical object 101 to be painted is shown. In FIG. 2, a longitudinal section including the shaft 90 is shown for the coating apparatus 1.

  The coating apparatus 1 is an apparatus that coats the inner surface 101b of the cylindrical object 101, and includes two receiving rollers 11 and 12, a driving unit 2, an application unit 31, and regulating units 41 and 42. Hereinafter, each component will be described in detail.

<Receiving rollers 11, 12>
Each of the two receiving rollers 11 and 12 has rotating shafts 111 and 121 along the axis 90 of the cylindrical object 101, and both contact the outer surface 101a of the cylindrical object 101 from the lower side. The receiving rollers 11 and 12 have different positions when viewed from the direction along the shaft 90 (FIG. 1).

  Thereby, the cylindrical object 101 placed on the receiving rollers 11 and 12 can be supported from below.

  The cylindrical object 101 is rotated by the drive unit 2 described later. At this time, in order to rotate the cylindrical object 101 at a predetermined position, it is preferable that the rotating shafts 111 and 121 of the receiving rollers 11 and 12 are substantially parallel to the shaft 90 of the cylindrical object 101.

<Drive unit 2>
The drive unit 2 is in contact with the outer surface 101 a of the cylindrical object 101 from the side opposite to the two receiving rollers 11 and 12. Thereby, the cylindrical object 101 placed on the receiving rollers 11 and 12 can be supported from above. Since the cylindrical object 101 is also supported from below by the two receiving rollers 11 and 12, the cylindrical object 101 is supported at three points.

  And the drive part 2 provides rotational force to the cylindrical object 101 in the state which supported the cylindrical object 101 at three points. Specifically, the drive unit 2 is a drive roller, and rotates about the rotation shaft 23 along the shaft 90. Such a driving roller is rotated by, for example, a motor. A frictional force generated between the driving roller and the cylindrical object is applied to the cylindrical object 101 as a rotational force.

  From the viewpoint of efficiently applying a rotational force to the cylindrical object, the drive roller as the drive unit 2 preferably has the following structure. That is, the drive roller includes a center member 20 and a covering member 21 that covers the center member. Since the exposed surface of the covering member 21 is in contact with the cylindrical object 101, it can be grasped as the surface 2a in contact with the cylindrical object 101 of the drive roller.

  The covering member 21 is made of an elastic material. The elastic material includes a resin in addition to a material such as rubber. As a result, the frictional force generated between the surface 2a of the drive roller and the cylindrical object 101 is increased, so that the rotational force of the drive roller is efficiently transmitted to the cylindrical object 101.

<Application part 31>
The application unit 31 is an apparatus that applies a paint to the inner surface 101 b of the cylindrical object 101. Specifically, the application unit 31 is a needle-type nozzle and can move along the shaft 90. In a state where the application part 31 is inserted into the cylindrical object 101, the tip 31 a of the application part 31 faces the inner surface 101 b of the cylindrical object 101. Therefore, the paint can be applied to the inner surface 101b by discharging the paint from the tip 31a.

(Operation of application unit 31)
The operation of the application unit 31 will be described with reference to FIG. When the cylindrical object 101 is placed on the receiving rollers 11 and 12, the application unit 31 is at a position P 1 that is away from the receiving rollers 11 and 12. Specifically, the position of the application unit 31 when viewed from the direction perpendicular to the shaft 90 is separated from the positions of the receiving rollers 11 and 12.

  After the cylindrical object 101 is supported by the receiving rollers 11 and 12 and the driving unit 2, the tip 31 a of the application part 31 is inserted into the cylindrical object 101 by moving the application part 31 in the direction 91 along the axis 90. . At this time, the tip 31a of the application part 31 is inserted to the vicinity of the opening end 101d (position P2) opposite to the opening end 101c of the cylindrical object 101 into which the application part 31 is inserted.

  And while rotating the cylindrical object 101 with the drive part 2, the coating material 31 is discharged from the front-end | tip 31a of the application part 31, and the inner surface 101b of the cylindrical object 101 is painted. At this time, the application unit 31 moves in a direction 92 opposite to the direction 91 while discharging the paint. Thereby, the coating material is spirally applied to the inner surface 101b of the cylindrical object 101. Therefore, the paint can be applied to the entire inner surface 101b.

<Regulators 41 and 42>
The restricting portions 41 and 42 are located on both sides of the cylindrical object 101 placed on the receiving rollers 11 and 12 and restrict the cylindrical object 101 from moving along the shaft 90. Thereby, the cylindrical object 101 can be rotated at a predetermined position.

  According to the coating apparatus 1 described above, it is possible to coat the inner surface 101b of the cylindrical object 101 while rotating the cylindrical object 101 only by supporting the cylindrical object 101 with the drive unit 2 and the two receiving rollers 11 and 12. . Therefore, a process required when painting the inner surface 101b of the cylindrical object 101 can be simplified.

  In addition, the cylindrical object 101 can be rotated while the cylindrical object 101 is supported at three points by the drive unit 2 and the two receiving rollers 11 and 12. Therefore, the center of rotation of the cylindrical object 101 is difficult to shift during painting, and thus the film formed by painting can be made uniform easily.

<Modification 1>
The drive unit 2 is preferably movable, and such an embodiment is shown in FIG. Specifically, the drive unit 2 can change the distance from at least one of the receiving rollers 11 and 12 when viewed from the direction along the shaft 90. FIG. 3 shows a case where the drive unit 2 can move up and down and the distance to both the receiving rollers 11 and 12 changes.

  According to the drive unit 2 described above, when the cylindrical object 101 is installed in the coating apparatus 1, the installation of the cylindrical object 101 is facilitated by moving the drive unit 2 away from the rollers 11 and 12. In addition, the cylindrical object 101 is supported at three points by placing the cylindrical object 101 on the two receiving rollers 11 and 12 positioned on the lower side and then moving the drive unit 2 downward to sandwich the cylindrical object 101. Can do. Therefore, even if the size (diameter) of the cylindrical object 101 is different, the cylindrical object 101 can be supported at three points. That is, the present invention can be applied to the cylindrical object 101 having various sizes (diameters).

  In such an embodiment (FIG. 3), it is preferable to use metal rollers for the receiving rollers 11 and 12 positioned on the lower side. This is because the center of rotation of the cylindrical object 101 does not shift even if the cylindrical object 101 is pressed from above by the drive unit 2 when the cylindrical object 101 is sandwiched.

  Therefore, if the application part 31 is positioned with respect to the cylindrical object 101 with a certain diameter, then it is not necessary to position the application part 31 with respect to the cylindrical object 101 with the same diameter. Is simplified.

  Although the case where the drive unit 2 is movable has been described above, for example, one of the receiving rollers 11 and 12 may be movable.

  Further, the drive unit 2 may be movable, and any of the two receiving rollers 11 and 12 may be movable. In this case, when the size (diameter) of the cylindrical object 101 is changed, not only the drive unit 2 but also the two receiving rollers 11 and 12 are moved. According to this aspect, the width of the changeable size (diameter) is expanded. The receiving rollers 11 and 12 are, for example, those that can move up and down and left and right independently of each other.

  In the above-described aspect in which both the drive unit 2 and the two receiving rollers 11 and 12 are movable, the cylindrical object 101 is installed as follows. First, the two receiving rollers 11 and 12 are moved to change their positions. Then, after the cylindrical object 101 is placed on the two receiving rollers 11 and 12, the driving unit 2 is moved downward to sandwich the cylindrical object 101. Thus, even when the two receiving rollers 11 and 12 are moved, the cylindrical object 101 can be supported at three points without shifting the center of rotation.

<Modification 2>
FIG. 4 is a longitudinal sectional view conceptually showing a modification of the coating apparatus 1. The coating apparatus 1 illustrated in FIG. 4 includes an application unit 32 instead of the application unit 31 (FIG. 2). The application unit 32 is a flat type nozzle, the tip 32 a is wide, and it can move along the shaft 90. FIG. 4 shows a case where the width of the tip 32a is substantially equal to the length of the cylindrical object 101 in the direction along the axis 90.

  As with the application part 31, the tip 32 a of the application part 32 faces the inner surface 101 b of the cylindrical object 101 when the application part 31 is inserted into the cylindrical object 101.

(Operation of application unit 32)
The operation of the application unit 32 will be described with reference to FIG. When the cylindrical object 101 is placed on the receiving rollers 11 and 12, the application unit 32 is at a position P 3 away from the receiving rollers 11 and 12. Specifically, the position of the application unit 32 when viewed from the direction perpendicular to the shaft 90 is separated from the positions of the receiving rollers 11 and 12.

  After the cylindrical object 101 is supported by the receiving rollers 11 and 12 and the driving unit 2, the tip 32 a of the application part 32 is inserted into the cylindrical object 101 by moving the application part 32 in the direction 91 along the axis 90. . At this time, the coating part 32 is inserted to a position P4 where the entire tip 32a is opposed to the inner surface 101b of the cylindrical object 101.

  Then, the inner surface 101b of the cylindrical object 101 is painted by discharging the coating material from the tip 32a of the application part 32 while rotating the cylindrical object 101 by the driving unit 2.

  According to the application part 32, a coating material can be apply | coated to the whole inner surface 101b. In addition, since it is not necessary to move the application unit 32 during painting, the control of the coating apparatus 1 is simplified.

<Modification 3>
FIG. 5 is a diagram conceptually showing a modification of the coating apparatus 1. The coating apparatus 1 shown in FIG. 5 includes an application unit 33 instead of the application unit 31 (FIG. 2). In FIG. 5, only a part of the coating unit 33 and the cylindrical object 101 in the coating apparatus 1 is shown in an enlarged manner.

  The application unit 33 includes a discharge unit 331 and a spatula 332. Both the discharge part 331 and the spatula 332 are movable along the axis 90. The discharge unit 331 is, for example, a nozzle, and discharges the paint onto the inner surface 101 b of the cylindrical object 101 in a state where the tip 331 a is inserted into the cylindrical object 101.

  The spatula 332 extends the paint discharged to the inner surface 101b. Specifically, the spatula 332 is disposed in a state straddling both the open ends 101c and 101d of the cylindrical object 101 (position P7). At this time, a gap having a predetermined width is provided between the spatula 332 and the inner surface 101b.

(Operation of application unit 33)
The operation of the application unit 33 will be described with reference to FIG. When the cylindrical object 101 is placed on the receiving rollers 11 and 12, both the discharge unit 331 and the spatula 332 are located at a position P 5 away from the receiving rollers 11 and 12. Specifically, the positions of the discharge unit 331 and the spatula 332 when viewed from the direction perpendicular to the shaft 90 are separated from the positions of the receiving rollers 11 and 12.

  After the cylindrical object 101 is supported by the receiving rollers 11 and 12 and the driving unit 2, the tip 331 a of the discharge unit 331 is inserted into the cylindrical object 101 by moving the application unit 32 in the direction 91 along the axis 90. . At this time, the discharge section 331 is inserted so that the tip 331a is positioned near the center of the inner surface 101b in the direction along the shaft 90 (position P6).

  And while rotating the cylindrical object 101 with the drive part 2, a coating material is discharged to the inner surface 101b of the cylindrical object 101 from the front-end | tip 331a of the discharge part 331. FIG.

  After discharging the paint, or in parallel with the operation of the discharge unit 331, the spatula 332 is inserted into the cylindrical object 101, and the discharged paint is stretched. FIG. 5 shows a case where the discharge part 331 and the spatula 332 are simultaneously inserted into the cylindrical object 101.

  According to the application part 33, a coating material can be apply | coated to the whole inner surface 101b. And since it coats using the spatula 331, it is easy to make the thickness of the coated film uniform. And since the clearance gap of predetermined width is provided between the spatula 331 and the inner surface 101b, the coated coating film can be made into predetermined thickness.

<Modification 4>
As described above, the rotating shafts 111 and 121 of the receiving rollers 11 and 12 are substantially parallel to the shaft 90 of the cylindrical object 101. However, the receiving rollers 11 and 12 are drawn so that the rotating shafts 111 and 121 draw a letter C. May be arranged. This will be specifically described with reference to FIG.

  FIG. 6 is a view of the receiving rollers 11 and 12 as viewed from above. The receiving rollers 11 and 12 are disposed such that the distance L between the receiving rollers 11 and 12 increases in the direction 92 along the shaft 90.

  According to the arrangement of the receiving rollers 11 and 12, the cylindrical object 101 can be moved in the direction 92 while being rotated by the driving unit 2. Therefore, the entire inner surface 101b of the cylindrical object 101 can be painted while the application portions 31 to 33 are fixed at predetermined positions.

  It can grasp | ascertain as follows including both the coating device 1 (FIG. 2) which can move the application parts 31-33 mentioned above, and the coating device 1 which moves the cylindrical object 101 of this modification. That is, the cylindrical object 101 and the application parts 31 to 33 are relatively movable in the direction along the axis 90.

1 is a side view conceptually showing a coating apparatus 1 according to an embodiment of the present invention. 1 is a longitudinal sectional view conceptually showing a coating apparatus 1. It is a figure which shows the modification of the coating device 1 notionally. It is a figure which shows the modification of the coating device 1 notionally. It is a figure which shows the modification of the coating device 1 notionally. It is a figure which shows the modification of the coating device 1 notionally.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coating device 2 Drive part 2a Surface 11,12 Receiving roller 31-33 Application | coating part 41,42 Control part 90 Shaft 101 Cylindrical object 101b Inner surface 111,121 Rotating shaft 331 Discharge part 332 Spatula

Claims (8)

An apparatus (1) for coating an inner surface (101b) of a cylindrical object (101),
Two rollers having a rotation axis (111, 121) along the axis (90) of the cylindrical object and in contact with the outer surface (101a) of the cylindrical object, the position when viewed from the direction along the axis Two different receiving rollers (11, 12),
A drive unit (2) that contacts the outer surface of the cylindrical object from the side opposite to the two receiving rollers and applies a rotational force to the cylindrical object;
A coating apparatus comprising: an application portion (31; 32; 33) for applying a coating material to the inner surface of the cylindrical object.   At least one of the drive unit (2) and the two receiving rollers (11, 12) is movable, and when viewed from a direction along the shaft (90), the other two at least The coating apparatus of Claim 1 which can change the distance with either one. The two receiving rollers (11, 12) are both made of metal, and are located below the cylindrical object (101),
The drive unit (2) is movable, can change the distance from the receiving roller when viewed from the direction along the shaft (90), and the surface (2a) in contact with the cylindrical object is elastic. The coating apparatus of Claim 1 or Claim 2 currently formed with the material.   The cylindrical object (101) and the application part (31; 32; 33) are relatively movable in a direction along the axis (90), according to any one of claims 1 to 3. The coating equipment described.   The coating apparatus according to claim 4, wherein the rotation shaft (111, 121) is substantially parallel to the shaft (90) of the cylindrical object (101).   The coating apparatus according to claim 4 or 5, further comprising a restricting portion (41, 42) for restricting movement of the cylindrical object (101) along the axis (90).   The two receiving rollers (11, 12) when viewed from the drive unit (2) side are arranged so that the rotation shafts (111, 121) draw a square shape. The coating equipment described. The application part (33)
A discharge part (331) for discharging the paint onto the inner surface (101b) of the cylindrical object (101);
The coating apparatus according to any one of claims 1 to 7, further comprising a spatula (332) for extending the paint discharged to the inner surface.

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