JP4947765B2 - Liquid applicator - Google Patents

Description

The present invention can apply a liquid to a liquid application apparatus, more specifically, an object to be applied conveyed by a conveyor, etc., and can apply uniformly or intermittently and shut off from the outside when not applied. Thus, the present invention relates to a liquid application apparatus that can prevent deterioration of quality such as drying, oxidation, and intrusion of dust inside the case.

Conventionally, a centrifugal application device (Patent Document 1) that applies liquid that is scattered by centrifugal force by rotating a liquid holding means such as a brush or a disc, or a bristles of a brush is repelled by a stick or a plate. Thus, a brush type coating apparatus (Patent Document 2) is known which is scattered and applied to an object to be coated.

However, in order to intermittently apply with the centrifugal application device, it is necessary to drive and stop the rotation of the liquid holding means or to switch the supply of the liquid to stop, and the intermittent application cannot be performed efficiently. That is, in the method of driving and stopping rotation, after stopping instantaneously with the braking means, in order to further apply the coating, the burden due to the repetition of the braking means and the time difference from the stopped state to the number of revolutions scattered. Occurs, and application cannot be performed instantaneously. In the method of switching between supply and stop of the liquid, even if the supply is stopped instantaneously, scattering continues until there is no liquid remaining in the liquid holding means, so that the stop of application cannot be instantaneously switched.

The amount of application can be adjusted by changing the number of revolutions and the amount of liquid supplied, but with either method, the size of the scattered liquid particles becomes coarse or fine and can be applied uniformly. Can not.

The brush-type applicator can be intermittently applied and the amount of application can be adjusted by controlling the contact of the sticks and plates used to bounce the hair of the brush, but it has the problem of poor durability due to wear of the hair. .

In addition, since the outlet of the splashing liquid is always open to the outside, the liquid inside the case will deteriorate in quality due to drying, oxidation, dust, etc. as time progresses, and it will adhere to the liquid holding means and brush There was a problem that it could not be applied uniformly.

In addition, there is a problem that the liquid adhering to the outlet of the scattered liquid drops as particles and falls on the object to be coated, resulting in poor application and contamination around the apparatus.

JP-A-8-294646 JP 2002-059033 A

The problem to be solved by the invention is that, in the method of driving and stopping rotation, after stopping instantaneously by the braking means, in order to further apply the coating, the burden due to repetition of the braking means and the stop state There is a time difference from the rotating speed to the scattering speed, and the application cannot be performed instantaneously. In the method of switching between supply and stop of the liquid, even if the supply is stopped instantaneously, scattering continues until there is no liquid remaining in the liquid holding means, so that the stop of application cannot be instantaneously switched. The size of the scattered liquid particles becomes coarse or fine, and cannot be applied uniformly. The brush-type applicator is inferior in durability due to wear of hair. Since the splashing liquid outlet is always open to the outside, the liquid inside the case will deteriorate in quality due to drying, oxidation, adhesion of dust, etc. as time goes on, and it will be uniform when fixed to the liquid holding means and brush It cannot be applied. The liquid adhering to the outlet of the scattered liquid drops as particles and falls on the object to be coated, resulting in poor application and dirty surroundings of the apparatus.

According to a first aspect of the present invention, there is provided a liquid holding apparatus provided in a case, wherein the liquid supplied to a liquid holding rotating body that is rotationally driven by a driving unit is scattered by centrifugal force due to rotation and applied to an object to be coated. An opening provided in a case corresponding to the outer peripheral side of the rotator, which allows the liquid supplied by the centrifugal force accompanying the rotation of the liquid holding rotator to be discharged out of the case, and an opening / closing member that opens and closes the opening And an operating member that opens and closes the opening / closing member, and a recovery unit that is provided in a case around the periphery of the opening and recovers the liquid adhering to the periphery of the opening .

According to a second aspect of the present invention, there is provided a liquid holding apparatus provided in a case, wherein the liquid supplied to a liquid holding rotating body that is rotationally driven by a driving unit is scattered by a centrifugal force due to rotation and applied to an object to be coated. An opening that is provided in a case corresponding to the outer peripheral side of the rotating body and that allows the liquid supplied by the centrifugal force accompanying the rotation of the liquid holding rotating body to be discharged out of the case, and the opening / closing amount with respect to the opening is adjusted. An opening / closing member that can adjust the amount of liquid applied to the coated body, an operating member that opens and closes the opening / closing member, and a case around the periphery of the opening, and is attached to the periphery of the opening And a recovery means for recovering the liquid .

The present invention enables intermittent coating by efficiently opening and closing the opening for scattering the liquid to the outside by the centrifugal force generated by the rotation of the liquid holding means. In addition, by closing the opening with the opening / closing member and blocking the inside of the case from the outside, it is possible to prevent the liquid inside from drying and oxidizing, and intrusion of dust and the like. Furthermore, it is possible to adjust the amount applied to the object by adjusting the opening degree of the opening portion by the opening / closing member. Furthermore, since the liquid adhering to the peripheral edge of the opening is prevented from dripping, it is possible to prevent defective application and contamination of the device periphery.

  The present invention provides an opening / closing member provided in a case at a location corresponding to the outer peripheral side of the liquid holding rotator, and capable of discharging the liquid supplied by the centrifugal force accompanying the rotation of the liquid holding rotator to the outside of the case. The best mode is to enable opening and closing.

Hereinafter, the liquid coating apparatus of the present invention will be described with reference to the drawings showing an example in which the liquid coating apparatus is applied as an oil coating apparatus for applying oil to a baking pan.

As shown in FIGS. 1 and 2, the case 3 of the oil coating apparatus 1 constituting the liquid coating apparatus has a cylindrical shape made of metal, synthetic resin or the like, or a partially cut shaft 5 having an axis in the horizontal direction. A brush 7 as a liquid holding rotating body having a notch cylindrical shape is fixed, and the shaft 5 of the brush 7 is rotatably supported by bearings 9 provided on the case 3 at both ends of the shaft.

One shaft end portion of the shaft 5 projects outward from the side wall of the case 3, and a pulley 11 is fixed to the projecting shaft end portion. The pulley 11 is drivingly connected to a pulley 19 attached to an output shaft 17 of a motor 15 as driving means via a belt 13, and rotates the brush 7 in a required direction as the motor 15 is driven.

The brush 7 is supplied by immersing and adhering a part of the outer peripheral lower part into the liquid (oil) stored in the liquid pool 21 provided in the lower part in the case 3. When the brush 7 is rotated counterclockwise, for example, by driving the motor 15, the supplied liquid is scattered over the circumference other than the liquid contact portion by the centrifugal force due to the rotation.

The bottom surface of the case 3 has an upstanding wall 23a which gradually increases in width from the inside toward the outside and has a length substantially equal to the axial length of the brush 7 and is higher than the liquid level of the liquid pool 21. A slit 23 as an opening is formed so as to communicate with the outside.

Below the case 3, for example, a transport device 25 such as a roller conveyor is provided so as to be transportable in a direction perpendicular to the axis of the brush 7, and the transport device 25 is a placed object to be coated. The top plate 27 for baking bread is conveyed so that the upper surface thereof faces the lower surface of the case 3 with a predetermined interval. On the top surface of the top plate 27, a part of the liquid splashed in the case 3 as the brush 7 rotates is discharged through the slit 23 and applied.

The standing wall 23a of the slit 23 is shaped like a letter C so that the liquid passing through the slit 23 does not interfere with the wall surface. The slit 23 may be formed integrally with the case 3.

Both ends of the shaft 29 are rotatably supported by the case 3 corresponding to the vicinity of the entrance of the slit 23, and a valve 31 as an opening / closing member is slit on the shaft 29 as the shaft 29 rotates. It is attached so as to swing between a position where the 23 inlets are closed and a position where they are opened away from the inlets.

An arm 33 is fixed to one shaft end portion of the shaft 29 protruding from one side surface of the case 3, and a rod tip portion of a cylinder 35 constituting the operating member is pivotally attached to a tip portion of the arm 33. It is supported. The valve 31 swings with the operation of the cylinder 35 to open and close the inlet of the slit 23.

The case 3 below the slit 23 is provided with a collection trough 37 as collection means. The collection trough 37 is inclined so that the upper end of the opposing inner wall 37a is positioned inside the lower end of the standing wall 23a.

Next, the liquid application action of the oil coating apparatus 1 configured as described above will be described.
When the motor 15 is driven in a state in which the inlet of the slit 23 is closed by the valve 31 that swings back by the cylinder 35 and the brush 7 is rotated in the above-described required direction, it adheres to the brush 7 that is immersed in the liquid. The liquid is scattered in the tangential direction in the case 3 by the centrifugal force generated by the rotation of the brush 7 (see FIG. 3).

In this state, when the transport device 25 is driven and the front end portion of the top plate 27 in the transport direction is carried below the slit 23, the cylinder 35 is operated to swing the valve 31 in the opening direction, thereby causing the slit 23. Open the entrance. Thereby, as shown by a solid line in FIG. 4, a part of the liquid scattered in the case 3 with the rotation of the brush 7 is applied by being discharged from the slit 23 onto the top surface of the top plate 27.

During the transport of the transported top plate 27, the inlet of the slit 23 is closed by returning the cylinder 35 and swinging in the closing direction to interrupt the application of the liquid to the top plate 27. The liquid is intermittently applied to the top plate 27 by repeating the above operation.

Further, when the rear end of the transported top plate 27 in the transport direction passes below the slit 23, the inlet of the slit 23 is closed by the valve 31 in the same manner as described above to restrict the discharge of the liquid, and the transport device It is prevented from adhering to 25.

Application is performed by adhering a part of the liquid scattered by opening the entrance of the slit 23 continuously or intermittently to the top plate 27 successively carried in by the transport device 25 below the slit 23 by repeating the above operation. To do.

When applying the liquid to the top plate 27, the rising wall 23a at the entrance of the slit 23 is made to have an acute angle so that the liquid discharged from the entrance of the slit 23 collides with and adheres to the standing wall 23a. However, as shown in FIG. 5, as shown in FIG. 5, a part of the liquid that collides with the entrance of the slit 23 gradually accumulates and falls down in the collection trough 37. The liquid dripping is received by the collection trough 37 to prevent the liquid from dripping around the top plate 27 and the apparatus and preventing the application failure and the apparatus periphery from being soiled.

The liquid collected in the collection trough 37 may be discharged to the outside through a connected discharge pipe, or may be returned to the liquid pool 21 of the case 3 by a connected pump (not shown).

The present invention can be modified as follows.
1. As shown in FIG. 6, a stopper 43 is screwed to a bracket 41 attached to the outer surface of the case 3 according to the position of the arm 33, and the screwing position of the stopper 43 with respect to the bracket 41 is changed to thereby change the tip end surface of the stopper 43. By changing the contact position of the arm 33, the amount of liquid scattered toward the entrance of the slit 23 may be adjusted, and the amount of liquid applied to the application target may be adjusted.

2. As a configuration that makes it possible to adjust the amount of liquid applied to the object to be coated, the stopper 43 is not necessarily used by configuring the operating member with an electric cylinder, an actuator, or the like so that the opening amount of the opening can be varied. The entrance width of the slit 23 can be arbitrarily adjusted.

3. As a configuration that makes it possible to adjust the amount of liquid applied to the object to be coated, as shown in FIG. The shutter plate 53 has an opening 53a that coincides with the entrance of the slit 23, and the opening 53a of the shutter plate 53 is selectively opened and closed with respect to the entrance of the slit 23, or the opening amount is variable. Also good.

4). The collection trough 37 described above is formed integrally with the case 3 corresponding to the lower side of the slit 23, but the collection means may be detachably attached to the case 3.

5). In the above description, the operating member is the cylinder 35, and the slit 23 is opened and closed by the valve 31 that swings by the operation of the cylinder 35. However, as shown in FIG. 8, a tension spring having one end attached to the case 3 or the like. The other end of the elastic member 81 is attached to the arm 33, and the valve 31 is always swung in the closing direction by the elastic force of the elastic member 81 to close the slit 23. On the other hand, when the cylinder is operated, the rod extends. May be configured to press the arm 33 against the arm 33 and swing the valve 31 in the opening direction to open the slit 23.

It is a perspective view of the oil application device which shows an example of the example of the liquid application device concerning the present invention. It is explanatory drawing which shows schematic structure of an oil coating device. It is explanatory drawing which shows the state which scattered the liquid within the case which closed the slit. It is explanatory drawing which shows the state which applies the liquid which spreads in the state which opened the slit to a top plate. It is explanatory drawing which shows the collection | recovery state of a liquid. It is explanatory drawing which shows the structure which varies the opening-and-closing amount of an opening part. It is explanatory drawing which shows the other structure which varies the opening / closing amount of an opening part. It is explanatory drawing which shows the other example of the opening-closing structure of an opening part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Oil application apparatus as a liquid application apparatus 3 Case 7 Brush 15 as a liquid holding rotator Motor 23 as drive means Slit 31 forming an opening portion Valve 35 as an opening / closing member Cylinder 37 as an operation member Recovery trough as recovery means

Claims (2)

In a liquid application apparatus that is provided in a case and that is supplied to a liquid holding and rotating body that is rotationally driven by a driving means, and is applied to an object to be applied by scattering by centrifugal force due to rotation,
An opening that is provided in a case corresponding to the outer peripheral side of the liquid holding rotator, and that allows the liquid supplied by centrifugal force accompanying the rotation of the liquid holding rotator to be discharged out of the case;
An opening and closing member for opening and closing the opening;
An operating member for opening and closing the opening and closing member;
A collecting means that is provided in a case around the periphery of the opening and collects the liquid adhering to the periphery of the opening;
A liquid application apparatus comprising: In a liquid application apparatus that is provided in a case and that is supplied to a liquid holding and rotating body that is rotationally driven by a driving means, and is applied to an object to be applied by scattering by centrifugal force due to rotation,
An opening that is provided in a case corresponding to the outer peripheral side of the liquid holding rotator, and that allows the liquid supplied by centrifugal force accompanying the rotation of the liquid holding rotator to be discharged out of the case;
An opening / closing member which is provided so that an opening / closing amount with respect to the opening can be adjusted, and which can adjust an application amount of a liquid applied to an object to be coated;
An operating member for opening and closing the opening and closing member;
A collecting means that is provided in a case around the periphery of the opening and collects the liquid adhering to the periphery of the opening;
A liquid application apparatus comprising:

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