JP5336927B2 - Substrate partial coating equipment - Google Patents

Description

  The present invention relates to a partial coating apparatus for a base material in which only a part of the base material such as an exterior material such as a roofing material is coated.

  For example, in a roof material made of cement, construction is performed in a state where a part is overlapped vertically, so that only a part is exposed to the outside and the other part is not exposed to the outside. For this reason, in the roofing material, only a part exposed to the outside is painted, and a part not exposed is not painted (for example, refer to Patent Document 1).

  In this way, there is a case where it is necessary to paint only a part of the surface of the base material, and an apparatus as shown in the schematic diagram of FIG. (This invention is hereinafter referred to as a conventional example) (see Patent Document 2).

  In this conventional example, the base material 3 is carried into the flow coater 2 by the carry-in conveyor 9 as shown in FIG. 6A, and at this time, the shutter 22 is held to the side of the discharge port 7 of the flow coater 2. . The paint 1 discharged from the discharge port 7 of the flow coater 2 and flowing down is received by the paint recovery bowl 8 between the conveyors 9 and 10. And when the base material 3 is carried below the flow coater 2 and the part to be painted (painted part) of the base material 3 passes directly under the discharge port 7, it flows down from the discharge port 7 to this coating part. The coating 1 to be applied is applied as shown in FIG. Subsequently, when a portion of the base material 3 that is not to be painted (non-painted portion) reaches directly below the discharge port 7, the shutter 22 is moved to a position directly below the discharge port 7 of the flow coater 2 as shown in FIG. . Thus, when the shutter 22 moves to a position immediately below the discharge port 7 of the flow coater 2, the paint 1 flowing down from the discharge port 7 is received on the shutter 22 and is blocked from reaching the upper surface of the substrate 3. Accordingly, the paint 1 is not applied to the non-painted portion of the upper surface of the substrate 3. As described above, the paint 1 flowing down from the discharge port 7 of the flow coater 2 is received by the shutter 22, flows to the paint discharger 20, flows down to the paint collector 21 below the shutter 22, and is collected. In addition, the code | symbol 23 in FIG. 6 shows the sensor which detects the front-end | tip and rear end of the base material 3 conveyed on the carrying-in side conveyor 9. FIG.

  In this manner, the base material 3 partially coated with the flow coater 2 is carried out by the conveyor 10 after passing under the flow coater 2. Then, when the rear end of the base material 3 passes directly below the discharge port 7, the shutter 22 is moved to a side position withdrawn from just below the discharge port 7 of the flow coater 2 as shown in FIG. This is provided for the coating of the substrate 3.

  As described above, when the base material 3 is applied to the lower side of the flow coater 2 in one direction by the conveyors 9 and 10 and the uncoated portion of the base material 3 passes through the flow-down position of the paint 1, the flow is performed. By moving the shutter 22 between the coater 2 and the base material 3 and receiving the paint 1, the paint 1 can be prevented from being applied to this portion of the base material 3, and partial coating is performed. It is something that can be done.

  However, in the above case, paint may spill from the shutter 22 or the paint 1 may adhere to the edge of the paint collector 21 and hang down. In this case, the coating material 1 falls on the non-coating portion of the base material 3 or the coating becomes partially thick, resulting in poor coating. In addition, since the paint recovery device 21 is disposed below the shutter 22, a certain distance (approximately 50 mm at least) is required between the base material 3 and the shutter 22. For this reason, when the shutter 22 blocks the paint 1 that has flowed down on the base material 3 in a curtain shape, the flow of the paint 1 is disturbed, so that the painted portion of the base material 3 as shown in FIG. There is a problem that the boundary between 18 and the non-painted portion 19 cannot be painted beautifully.

Japanese Patent Laid-Open No. 7-292925 JP 2007-117958 A

  The present invention has been made in view of the above points, and there is no unnecessary paint dropping from the shutter, and the base material capable of neatly painting the boundary portion between the painted portion and the non-painted portion of the base material. The object is to provide a partial coating device.

The base material partial coating apparatus according to the present invention transports the base material 3 in a horizontal posture so as to pass below the flow coater 2 which supplies the paint 1 in the form of a curtain and supplies the paint from the flow coater 2. This is a partial coating apparatus for a base material in which the coating material 1 flowing down toward the recovery basket 8 is applied to a part of the surface of the base material 3 and is partially applied, and is conveyed in one direction below the flow coater 2 When the non-painted portion 19 where the base material 3 is not applied passes through the flow-down position of the paint 1 from the flow coater 2, it is inserted between the flow coater 2 and the base material 3 in a horizontal posture and the upper surface The paint 1 flowing down from the flow coater 2 is received, and after the non-painted portion 19 has passed through the flow-down position, the paint 1 received on the upper surface is recovered while being retracted in the direction opposite to the insertion direction. It was to drop poured into the gutter 8 It is characterized in further comprising a Yatta 4.

  In the present invention, a receiving portion 5 that receives the paint 1 and a rising portion 6 that protrudes upward at a position opposite to the insertion direction with respect to the receiving portion 5 are formed on the upper surface of the shutter 4. Preferably it is. In this case, the flow in the direction opposite to the insertion direction of the paint 1 on the receiving part 5 is stopped by the rising part 6 and the paint 1 does not advance any more, so that it is received when the shutter 4 is retracted. The paint 1 placed on the part 5 is likely to flow down to the paint collection bowl 8. Further, the rising portion 6 increases the rigidity of the shutter 4.

  In the present invention, it is preferable that the insertion direction of the shutter 4 is the same direction as the conveyance direction of the substrate 3. In this case, steam can be prevented from condensing on the frame or the like, and water drops can be prevented from falling.

  According to the present invention, when the base material is partially passed by passing under the flow coater in one direction, the shutter is inserted in a horizontal position between the flow coater and the base material, and flows at the receiving portion on the upper surface of the shutter. By temporarily placing the paint that flows down from the coater and allowing the paint received at the receiving part to flow down when the shutter is retracted, there is no need for a paint collector installed below the shutter, and there is no need for it from the shutter. Paint can be removed, and the distance between the base material and the shutter can be reduced, and the paint curtain film flowing down from the flow coater is less disturbed. Can be painted beautifully.

An example of embodiment of the coating device of this invention is shown, (a)-(f) is a schematic front view, respectively. The coating apparatus same as the above is shown, (a) is a partially enlarged schematic front view, and (b) is a partial schematic bottom view. (A) is a perspective view which shows the base material by which the partial coating was given by the prior art example, (b) is a perspective view which shows the base material by which the partial coating was given by this invention. It is the one part enlarged schematic front view of a coating apparatus same as the above. It is a schematic perspective view which shows an example of the other form of the shutter 4 of a coating apparatus same as the above. A prior art example is shown, and (a) to (d) are schematic front views, respectively.

  Hereinafter, modes for carrying out the present invention will be described.

  FIG. 2 shows a coating apparatus according to this embodiment. A pair of conveyors 9 and 10 formed by a belt conveyor or the like are arranged in a straight line as shown in FIG. The pair of conveyors 9 and 10 are driven and driven in the same direction at the same speed, so that the base material 3 can be conveyed in one direction from the carry-in conveyor 9 to the carry-out conveyor 10 in a horizontal posture. is there.

  Between the front and rear ends of the pair of conveyors 9 and 10, the flow coater 2 is disposed above. The flow coater 2 has an elongated slit-like discharge port 7 formed on the lower surface, and the paint 1 flows down from the discharge port 7 in a thin curtain shape. The discharge port 7 is set in a direction perpendicular to the longitudinal direction of the conveyors 9 and 10. Further, a paint recovery rod 8 is provided between the front and rear ends of the conveyors 9 and 10 at a position directly below the discharge port 7 of the flow coater 2. The paint recovery bowl 8 is disposed at a position below the upper surfaces of the belt conveyors 9 and 10. The base material 3 is carried into the lower part of the flow coater 2 by the conveyor 9, passes through the lower part of the flow coater 2, and then carried out by the conveyor 10.

  Of the pair of conveyors 9 and 10, a shutter 4 is disposed above the carry-in conveyor 9 as shown in FIG. The shutter 4 reciprocates horizontally in a direction parallel to the conveying direction of the conveyor 9 between a position directly below the discharge port 7 of the flow coater 2 and a side position of the flow coater 2 that is outside the position immediately below the discharge port 7. It is supposed to be driven. On the upper surface of the shutter 4, as shown in FIG. 4, there are a receiving portion 5 that receives the paint 1 arranged horizontally, and a rising portion 6 that protrudes upward from one end of the receiving portion 5 opposite to the flow coater 2. Is formed. Further, the support portion 11 extends from the upper end of the rising portion 6 in the horizontal direction opposite to the receiving portion 5. The shutter 4 is formed, for example, by bending a thin sheet metal. At this time, the rising portion 6 is formed on the shutter 4 from one end to the other end in a direction perpendicular to the reciprocating direction. In this case, the thickness of the shutter 4 can be reduced, and the rigidity of the shutter can be improved by bending, and for example, the shutter 4 having a thickness of about 1 mm can have high rigidity.

  As shown in FIG. 2, the shutter 4 is driven to reciprocate by a mechanism (crank mechanism) that uses the servo motor 12 as power and converts the rotational motion of the rotating body 14 that rotates about the vertical axis into reciprocating motion by the servo motor 12. It is made to do. The rotating body 14 is provided on the side opposite to the flow coater 2 with respect to the shutter 4. The rotating body 14 and the support portion 11 are connected by a connecting rod 13. Both ends of the connecting rod 13 are respectively attached to the positions eccentric from the rotation center of the rotating body 14 and the support portion 11 so as to be rotatable about a vertical rotation shaft. The coating apparatus is provided with a linear guide 15 that guides the moving direction of the shutter 4 in a horizontal direction parallel to the conveying direction of the base material 3. The linear guide 15 includes, for example, a pair of support portions 16 that support the upper surface of the support portion 11 and a pair of parallel and parallel guide rails 17 that support the support portions 16 slidably in the horizontal direction. For this reason, by rotating the rotating body 14, the shutter 4 can be horizontally reciprocated in a direction parallel to the conveying direction of the base material 3. Since the shutter 4 is operated by such a crank mechanism, vibration in the reciprocating motion of the shutter 4 is reduced, and the shutter 4 can be operated even with small power. Reference numeral 24 denotes a frame that supports the servo motor 12, the rotating body 14, and the guide rail 17 of the linear guide 15.

  Further, a sensor 25 for detecting the position of the base material 3 on the carry-in conveyor 9 and controlling the operation timing of the shutter 4 is disposed above the conveyor 9. This sensor 25 detects the front end and the rear end of the base material 3 conveyed on the carry-in conveyor 9, and the servo motor 12 is operated after a predetermined time from this detection, so that the shutter 4 is connected to the flow coater 2. When the rear end of the base material 3 is detected by the sensor 25, the servo motor 12 is actuated after a predetermined time from the detection to move the shutter 4 to the side position of the flow coater 2. And a control mechanism for controlling the operation of the servo motor 12 so as to move backward. Two sensors 25 are used in the feed direction of the base material 3, and even if the base material 3 is bent and conveyed, the shutter 4 is used as described later in accordance with the timing detected later. May be moved back and forth so that no unpainted portion is left on the portion where the paint 1 is applied.

  Next, when partially painting the surface of the base material 3 with the coating apparatus formed as described above, the plurality of base materials 3 are sequentially directed toward the flow coater 2 by the carry-in conveyor 9 at intervals. Carry in. When the base material is carried in, the front end and the rear end of the base material are sequentially detected by the sensor 25. At this time, as shown in FIG. 1A, the shutter 4 is in a retracted position, and is kept behind the flow coater 2 on the same side as the base material 3. Therefore, the paint 1 discharged from the discharge port 7 of the flow coater 2 onto the curtain and received by the paint collection container 8 is received.

  And when the base material 3 is carried in the downward direction of the flow coater 2 with the carrying-in conveyor 9, the part to be painted (the coating part 18, see FIG. 3) of the base material 3 passes directly under the discharge port 7. In this case, the paint 1 flowing down in a curtain shape from the discharge port 7 is applied to the coating portion 18 as shown in FIG. Subsequently, as shown in FIG. 1C, the base material 3 is conveyed on the carry-in conveyor 9, and a portion of the base material 3 that is not painted (see the non-painted portion 19, FIG. 3) immediately below the discharge port 7. When passing, the servo motor 12 is operated to advance the shutter 4 so that it is inserted between the flow coater 2 and the base material 3 in a horizontal posture and moved to a position directly below the discharge port 7 of the flow coater 2. . The timing of the movement of the shutter 4 is controlled by operating the servo motor 12 after a lapse of a predetermined time after the front end of the substrate is detected by the sensor 25. The predetermined time is set in advance based on the conveyance speed of the base material 3 on the conveyor 9 and the detection position of the tip of the base material 3 on the conveyor 9. Thus, when the shutter 4 moves to a position immediately below the discharge port 7 of the flow coater 2, the curtain-like paint 1 flowing down from the discharge port 7 is received by the receiving portion 5 formed on the upper surface of the shutter 4, and the base material 3. It is blocked from reaching the top surface. Accordingly, the paint 1 is not applied to the non-painted portion 19 of the substrate 3. At this time, when the coating material 1 flowing down from the discharge port 7 of the flow coater 2 is received by the receiving portion 5 on the upper surface of the shutter 4, the coating material 1 moves on the surface of the receiving portion 5 by moving the shutter 4 forward. It flows in the direction.

  In this way, the base material 3 partially coated with the flow coater 2 as shown in FIG. 1D passes through the lower side of the flow coater 2 and is then carried out by the conveyor 10. When the rear end of the base material 3 passes just below the discharge port 7 of the flow coater 2, the servo motor 12 is operated to retract the shutter 4 as shown in FIG. The shutter 4 is moved from the position immediately below the discharge port 7 of the flow coater 2 to the side position as shown in FIG. The movement timing of the shutter 4 is controlled by operating the servo motor 12 after a predetermined time has elapsed after the rear end of the substrate is detected by the sensor 25. The predetermined time is set in advance based on the conveyance speed of the base material 3 on the conveyor 9 and the detection position of the rear end of the base material 3 on the conveyor 9. At this time, the paint 1 placed on the receiving portion 5 flows away from the rising portion 6 due to the backward movement of the shutter 4, and the base material 3 before painting and the base material 3 after painting as shown in FIG. In the meantime, it flows down from the receiving part 5 to the paint collecting bowl 8 and is reused. By repeating this operation, a plurality of base materials 3 are sequentially coated.

  When the shutter 4 operates as described above, the flow of the paint 1 received by the shutter 4 on the receiving portion 5 is stopped by the rising portion 6 and the paint 1 does not advance any more. It is prevented from flowing down from the opposite side to the direction in which the shutter 4 is inserted. Further, since the distance at which the paint 1 flows on the receiving portion 5 when the shutter 4 moves backward is restricted by the rising portion 6, the paint 1 placed on the receiving portion 5 when the shutter 4 moves backward becomes the paint collecting rod 8. It will be easy to flow down.

  As described above, when the base material 3 is applied to the lower side of the flow coater 2 in one direction by the conveyer 9 and is coated, the flow coater 2 is moved when the non-coating portion 19 of the base material 3 passes the flow-down position of the paint 1. By moving the shutter 4 between the base material 3 and receiving the paint 1, it is possible to prevent the paint 1 from being applied to this part of the base material 3 and to perform partial coating. I can do it. In the reciprocating movement of the shutter 4, the paint 1 is temporarily placed on the receiving portion 5 when the shutter 4 is advanced, and the paint 1 is allowed to flow down from the receiving portion 5 to the paint collecting bowl 8 when the shutter 4 is moved backward. As a result, it is not necessary to provide the paint recovery device 21 below the shutter 4 as in the case of the conventional example, and unnecessary paint removal from the paint recovery device 21 does not occur. Further, by reducing the thickness of the front end portion of the shutter 4 on the receiving portion 5 side, the amount of the paint 1 adhering to the front end surface of the shutter 4 is reduced, and unnecessary paint dropping from the front end surface of the shutter 4 is reduced. I can do it. The thickness of the shutter tip is preferably 0.5 to 3.0 mm. Furthermore, by eliminating the need for the paint recovery device 21, the distance H between the base material 3 and the upper surface of the shutter 4 shown in FIG. 4, that is, the distance between the blocking position of the paint 1 and the base material 3 can be reduced. For this reason, when the paint 1 flowing down from the discharge port 7 of the flow coater 2 is blocked by the shutter 4, even if the flow of the paint 1 is disturbed, the paint 1 is applied to the base material 3 before the disturbance becomes large. As shown in FIG. 3B, the boundary portion between the painted portion 18 and the non-painted portion 19 of the base material 3 can be beautifully painted. The value of the distance H is appropriately set, but is preferably 5 to 40 mm.

  In the present embodiment, the paint 1 can be held in the receiving part 5 on the upper surface of the shutter 4 when the shutter 4 is inserted, and the paint 1 must flow down from the receiving part 5 to the paint collecting bowl 8 when the shutter 4 is retracted. However, depending on the viscosity and coating amount of the paint 1 and the transport speed of the conveyors 9 and 10, the speed at which the shutter 4 is moved immediately below the discharge port 7 of the flow coater 2, the time to stop just below the discharge port 7, This can be dealt with by appropriately adjusting the speed of retraction from directly under the outlet 7. In addition, as the paint 1 to be used, inorganic paint, acrylic, acrylic / styrene, vinyl acetate, EVA (ethylene-vinyl acetate copolymer resin), fluorine, urethane, and the like having a relatively low viscosity of 100 cP or less. Is preferred.

  Further, the shape of the shutter 4 does not have to be the shape shown in the embodiment of FIG. 1. For example, as shown in FIG. 5, by providing a rising portion 6 that protrudes upward on the upper surface of a thin sheet metal, 4 can be formed. In this case, the receiving part 5 and the support part 11 are formed on both sides of the rising part 6, respectively. In addition to this, for example, by forming a step portion on the shutter 4, this step portion can be used as the rising portion 6.

1 Paint 2 Flow coater 3 Base material 4 Shutter 5 Receiving part 6 Rising part 8 Paint recovery bowl

Claims (4)

Paint so flowed down in a curtain shape passes under the curtain coater supplying, conveying the substrate in a horizontal attitude, the paint flowing down toward the paint recovery gutter from the flow coater surface of said substrate one a part coating apparatus of the substrate by coated on parts perform partly painted, unpainted portions painting is not performed in the substrate to be transported in one direction below said flow coater wherein flow coater when passing through the flow-down position of the paint from the paint receiving the uncoated portion the falling position flowing down from the flow coater inserted and the upper surface in a horizontal position between the flow coater and the substrate after passing through the insertion with are retracted in the opposite direction, part of the base material, characterized in that it comprises a shutter that received paint the top surface was set to drop flowed into the paint recovery gutter Coating apparatus. 2. The substrate partial coating apparatus according to claim 1, wherein the coating material collecting basket is disposed at a position below a top surface of a conveyor that conveys the substrate. The upper surface of the shutter, and a receiving portion for receiving the paint, according to claim 1 or, characterized in that the rising portion is formed protruding upward in the opposite direction position to the insertion direction with respect to the receiving portion The partial coating apparatus for a base material according to 2 . Inserting direction of the shutter, the substrate portion painting apparatus according to any one of claims 1 to 3, characterized in that the same direction as the conveying direction of the substrate.

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