JP2010264407A - Coating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating apparatus which can prevent the dripping of a fluid material out of the coating apparatus when no fluid material is applied. <P>SOLUTION: The coating apparatus 10 includes a rotor 11 supported rotatably, in which a nozzle hole 11c spurting out the fluid material is formed. In a state that a nozzle hole 11c forming place in which the nozzle hole 11c is formed in the rotor 11 has entered a work hole 2 formed on a workpiece 1, the fluid material is applied to the inner periphery of the work hole 2 by the rotation of the rotor 11. Further, a cover member 14 is provided. The cover member is movably supported between a posture surrounding the circumference of the nozzle hole 11c forming place and a posture not surrounding the circumference of the nozzle hole 11c forming place, turns to the posture not surrounding the circumference of the nozzle hole 11c forming place when the rotor 11 has entered the work hole 2, and turns to the posture surrounding the circumference of the nozzle hole 11c forming place when the rotor 11 leaves from the work hole 2. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a coating apparatus.

  2. Description of the Related Art Conventionally, coating apparatuses that apply a fluid material such as an adhesive or a sealant to the inner periphery of a work hole formed in a work are well known. For example, it is described in Patent Document 1.

The coating apparatus described in Patent Document 1 includes a rotor that ejects a sealant (fluid material). The rotor is a rotating body having a cylindrical shape, and a plurality of nozzle holes are formed on the outer peripheral surface thereof. The said coating apparatus is a structure which spouts a sealing agent by a centrifugal force from a nozzle hole by rotating a rotor and supplying a sealing agent to a rotor. The main body that supports the rotor so as to be rotationally driven has a plurality of guide members having different diameters.
The coating device rotates the rotor while the rotor is entering the workpiece hole of the workpiece, and supplies the sealing agent to the rotor, thereby spraying the sealing agent from the nozzle hole and coating the inner circumference of the workpiece hole. To do. At this time, the guide member is engaged with the workpiece hole, thereby preventing the sealant from being scattered during application.

For example, when applying the sealing agent to the inner periphery of each workpiece hole of a plurality of workpieces flowing through the line using the coating device, each workpiece is subjected to a series of operations (1) to (4) below. On the other hand, the form which applies a sealing agent sequentially is realizable.
(1) The rotor is advanced into the workpiece hole, and the guide member is engaged with the workpiece hole. (2) The rotor is rotated, and the sealing agent is supplied to the rotor, thereby ejecting the sealing agent to the inner periphery of the workpiece hole ( (3) After a predetermined time has elapsed, the supply of the sealant to the rotor is stopped, and further, the rotation of the rotor is stopped to stop the application of the sealant. (4) The guide member and the workpiece The engagement with the hole is released, and the rotor is retracted from the work hole.

  However, after the work of (4) is finished, it remains in the rotor until the work of (1) is started for the next work flowing through the line, that is, when the sealant is not applied. The sealing agent that is present may flow out of the nozzle hole located below due to the action of gravity and hang down outside the coating apparatus.

Japanese Utility Model Publication No. 4-134458

  The present invention provides a coating apparatus capable of preventing the flowable material from dripping out of the coating apparatus when the flowable material is not applied.

  The coating apparatus according to claim 1, comprising a rotor that is rotatably supported and has a nozzle hole that ejects a flowable material, wherein the nozzle hole is formed at the nozzle hole. An applicator for applying a fluid material to the inner periphery of the work hole by rotating the rotor in a state where the part has entered a work hole formed in the work, and surrounding the nozzle hole forming part And is supported so as to be movable between postures that do not surround the periphery of the nozzle hole forming portion, and is in a posture that does not surround the periphery of the nozzle hole forming portion when the rotor enters the work hole. Is provided with a cover member having a posture surrounding the periphery of the nozzle hole forming portion when the nozzle is retracted from the work hole.

  The coating apparatus according to claim 2 includes a return passage that communicates the space surrounded by the inner peripheral surface of the cover member with the means for collecting the fluid material.

  In the coating device according to claim 3, the tip of the cover member has a shape corresponding to the shape of the opening of the work hole, and the tip of the cover member is in a state where the rotor has entered the work hole. The portion comes into contact with the peripheral edge of the opening of the workpiece hole.

  The coating apparatus according to claim 4 includes a rotor that is rotatably supported and has a nozzle hole that ejects a flowable material, wherein the nozzle hole is formed at the nozzle hole. An application device for applying a fluid material to the inner periphery of the work hole by rotating the rotor in a state where a portion enters a work hole formed in the work, and the rotor by being fixed to the rotor And a weight that is disposed on the opposite side of the rotor from the side where the nozzle hole is formed around the axis of the rotor, and that comes to the lowest point on the rotation locus by its own weight when the rotor does not rotate. It is to be prepared.

  According to the present invention, it is possible to prevent the flowable material from dripping out of the coating apparatus when the flowable material is not applied.

It is sectional drawing of the coating device which is 1st embodiment of the coating device which concerns on this invention, (a) is a figure which shows when the cover member of a coating device exists in a rotor accommodation attitude | position, (b) is a cover member. It is a figure which shows when it exists in a rotor exposure attitude | position. It is a figure which shows the attitude | position of the application | coating apparatus when apply | coating Loctite to the workpiece | work hole formed in a workpiece | work using the application | coating apparatus of FIG. 1, (a) And (c) is the attitude | position of the application | coating apparatus at the time of non-application of Loctite (B) is a figure which shows the attitude | position of the coating device at the time of application | coating of Loctite. It is sectional drawing of the coating device which is 2nd embodiment of the coating device which concerns on this invention. It is a figure which shows the relationship between the rotation speed of the rotor per unit time, the number of nozzle holes, and the application quantity of Loctite.

[First embodiment]
Below, the coating device 10 which is 1st embodiment of the coating device which concerns on this invention is demonstrated with reference to drawings.

  The coating apparatus 10 applies Loctite (trade name: manufactured by Nippon Loctite Co., Ltd.), which is an example of a fluid material, to the inner periphery of the workpiece hole 2 that is a bottomed hole formed in the workpiece 1 (for example, a cylinder head). And apply Loctite before cylinder block plug and tube union press-fitting). Loctite is an anaerobic adhesive that cures at room temperature when the air is blocked. In this embodiment, liquid Loctite having a relatively low viscosity is used.

  As shown in FIGS. 1A and 1B, the coating apparatus 10 includes a rotor 11, a rotating device 12, a main body 13, a cover member 14, an elastic member 15, and a return passage 16.

  The coating apparatus 10 applies Loctite to the inner periphery of the work hole 2 by ejecting Loctite from the rotor 11 while the rotor 11 enters the work hole 2.

  The rotor 11 ejects Loctite. The rotor 11 has the ejection part 11a and the axial part 11b.

The ejection part 11a is formed in the front-end | tip of the axial part 11b as a rotary body which has a column shape. Further, a supply path for supplying Loctite is formed inside the ejection part 11a. A nozzle hole 11c that communicates the supply path with the outer peripheral portion of the ejection portion 11a is formed on the side of the ejection portion 11a. When the jetting part 11a rotates in a state where the Loctite is supplied to the supply path, centrifugal force acts on the Loctite so that the Loctite is ejected from the nozzle hole 11c.
In the present embodiment, one nozzle hole 11c is formed, but a plurality of nozzle holes 11c, 11c,... May be formed on the outer peripheral portion of the ejection portion 11a, for example, a plurality of nozzle holes 11c, 11c,. -May be formed at equal intervals in the circumferential direction of the ejection portion 11a.
The shaft portion 11 b extends in the horizontal direction, one end is fixed to the bottom surface of the ejection portion 11 a, and the other end is connected to the rotating device 12. The ejection part 11a is rotated by driving the shaft part 11b by the rotating device 12. In addition, the ejection part 11a and the axial part 11b are arrange | positioned concentrically.

The rotating device 12 is a drive source that includes a motor and the like and rotates the rotor 11. The rotating device 12 is connected to the shaft portion 11b, and the rotor 11 rotates around the shaft of the shaft portion 11b by the rotational driving force generated by the rotating device 12.
A center line of the nozzle hole 11c (a line passing through the center of the opening of the nozzle hole 11c) exists in a direction orthogonal to the axis of the rotor 11 (the axis of the shaft portion 11b).

The main body 13 rotatably supports the rotor 11 and accommodates therein a rotating device 12 that rotationally drives the rotor 11.
The main body 13 is provided with a sliding portion 13a formed as a hole through which the cylindrical guide member 14 can slide. The sliding portion 13 a is formed in a ring shape with a surface perpendicular to the axial direction (horizontal direction) of the rotor 11 around the rotor 11. The sliding portion 13a extends in the same direction as the shaft portion 11b, that is, in the horizontal direction, one end is opened at the end surface 13b of the main body 13, and the other end is closed to form a bottom portion.

The main body 13 is connected to a moving device (not shown). The moving device moves the main body 13 to a predetermined position, and includes an actuator such as a hydraulic cylinder or a motor. The moving device is configured to be able to move the main body 13 in the direction of approaching / separating from the workpiece 1 to which Loctite is applied.
When the main body 13 is moved by the moving device, the rotor 11 moves together with the main body 13. Then, by bringing the rotor 11 close to the workpiece 1, a portion (nozzle hole forming portion) where the nozzle hole 11 c is formed in the rotor 11 enters the workpiece hole 2, and the rotor 11 is separated from the workpiece 1, thereby The nozzle hole forming portion is withdrawn from the work hole 2. That is, by the operation of the moving device, the rotor 11 can move in the direction of entering the work hole 2 / the direction of retreating from the work hole 2.

The cover member 14 is a member that covers the periphery of the rotor 11 to prevent scattering of Loctite ejected from the ejection portion 11a during application, and prevents Loctite from dripping from the nozzle hole 11c during non-application.
The cover member 14 is formed in a cylindrical shape that is open at both ends. More specifically, the cover member 14 has a shape surrounding the periphery of the rotor 11, and the shape of the surface perpendicular to the axial direction (horizontal direction) of the shaft portion 11 b is formed in a ring shape centering on the rotor 11. The inner diameter of the cover member 14 is set larger than the diameter of the rotor 11.
One end side of the cover member 14 is inserted into the sliding portion 13a, the other end side protrudes from the main body 13, and the cover member 14 is configured to be slidable along the sliding portion 13a. That is, the cover member 14 is configured to be able to change the amount of protrusion from the main body 13 by sliding in the sliding portion 13a.
Further, the shape of the other end portion (tip portion) of the cover member 14 has a shape corresponding to the shape of the opening of the work hole 2, and has a shape slightly larger than the opening along the opening of the work hole 2. Have. Thereby, the front-end | tip part of the cover member 14 contact | abuts to the opening peripheral part of the workpiece | work hole 2, and is comprised so that it cannot enter the workpiece | work hole 2 (refer FIG.1 (b)).

The elastic member 15 is a coil spring and is fitted into the sliding portion 13 a of the main body 13. The elastic member 15 is interposed between the bottom portion of the sliding portion 13 a and the bottom side end portion of the cover member 14, and biases the cover member 14 in a direction protruding from the main body 13.
At the time of non-application, the elastic member 15 biases the cover member 14, so that the cover member 14 protrudes from the main body 13, and the cover member 14 has a posture surrounding the nozzle hole 11 c (FIG. 1A). reference).
Further, when a pressing force against the urging force of the elastic member 15 is applied via the cover member 14, the elastic member 15 contracts and the amount of protrusion of the cover member 14 from the main body 13 is reduced. At the time of application, the cover member 14 is pushed into the sliding portion 13a in this manner, so that the nozzle hole 11c of the rotor 11 protrudes from the tip end portion of the cover member 14, and the cover member 14 is in the nozzle hole 11c. The posture does not surround the periphery (see FIG. 1B).

The return passage 16 is a flow path for allowing Loctite accumulated in the cover member 14 to flow out to the outside by being scattered or dripped into the cover member 14 and having one end connected to the lower end portion inside the cover member 14. The other end is connected to a collection device (not shown), and the space in the cover member 14 communicates with the collection device. Loctite inside the cover member 14 flows to the recovery device through the return passage 16 by the action of gravity, a pump, and the like, and is recovered by the recovery device.
The Loctite after being collected by the collecting device is reused after being appropriately supplied to the rotor 11 after being subjected to appropriate processing.

Below, the procedure at the time of apply | coating Loctite to each work hole 2 inner periphery of the several workpiece | work 1 * 1 ... which flows through a line using the coating device 10 is demonstrated.
The following operations (1) to (4) are performed on each workpiece 1 flowing through the line, and Loctite is sequentially applied to the inner peripheral surface of the workpiece hole 2 of each workpiece 1.

  (1) As shown in FIG. 2A, the coating apparatus 10 is not applied (the rotor 11 and the cover member 14 are separated from the work 1 and the cover member 14 protrudes from the nozzle hole 11c of the rotor 11). When the work 1 flows to a predetermined position, the moving device is actuated to bring the main body 13 close to the work 1 and the cover member 14 is brought into contact with the work 1. Is pushed into the sliding portion 13 a so that the rotor 11 protrudes from the cover member 14, and the rotor 11 enters the work hole 2.

(2) As shown in FIG. 2B, in a state where the rotor 11 has entered the workpiece hole 2, the rotor 11 is rotated, and Loctite is supplied to the rotor 11. Thereby, Loctite is ejected from the nozzle hole 11 c by the centrifugal force generated by the rotation of the rotor 11 and applied to the inner periphery of the work hole 2.
At this time, the cover member 14 comes into contact with the peripheral edge of the opening of the work hole 2 and covers the gap between the work hole 2 and the main body 13, so that the dispersion of Loctite at the time of application can be prevented.

  (3) After a predetermined time has elapsed, the supply of Loctite is stopped, the rotation of the rotor 11 is further stopped, and the application of Loctite is stopped.

(4) As shown in FIG. 2 (c), the moving device is operated to separate the main body 13 from the work 1 and to retract the rotor 11 from the work hole 2.
At this time, the cover member 14 is urged by the elastic member 15 to receive a force in a direction protruding from the main body 13, and the state in which the opening of the cover member 14 is in contact with the opening peripheral edge of the work hole 2 is maintained. . As a result, when the rotor 11 is withdrawn from the workpiece hole 2 (when the application state is changed to the non-application state), even if Loctite drips from the nozzle hole 11c, the cover member 14 covers the periphery of the nozzle hole 11c. Therefore, dripping of the Loctite from the coating device 10 can be prevented.
Further, after the main body 13 is further moved and the rotor 11 is completely retracted from the work hole 2, the tip of the cover member 14 protrudes from the nozzle hole 11 c of the rotor 11 by the biasing force of the elastic member 15. In addition, it is possible to prevent dripping of Loctite from the coating device 10 at the time of non-coating.

  When the operation (4) is completed, the operations (1) to (4) are performed on the next workpiece 1 flowing through the line.

As described above, the period from the completion of the operation (4) to the start of the operation (1) on the workpiece 1 flowing through the line, that is, when Loctite is not applied to the inner periphery of the workpiece hole 2. The cover member 14 is in a position protruding from the nozzle hole 11 c of the rotor 11. As a result, even if Loctite remaining in the rotor 11 flows out through the nozzle hole 11c, it falls into the cover member 14, so that it can be prevented from dripping out of the coating apparatus 10 (floor, workpiece 1, etc.). (See FIG. 2 (c)).
The Loctite that has fallen into the cover member 14 flows to the recovery device through the return passage 16 and is reused. Thereby, waste of Loctite can be suppressed (see FIG. 2C).

Further, when Loctite is ejected from the nozzle hole 11c of the rotor 11 in the above (2), the side end portion of the cover member 14 is in contact with the opening peripheral edge portion of the work hole 2, and the work hole 2 and the cover member 14 are in contact with each other. The inside is continuously connected (see FIG. 2B).
As a result, when Loctite ejected from the nozzle hole 11 c is scattered outside the work hole 2, it is scattered inside the cover member 14 continuously connected to the work hole 2. Therefore, it is possible to prevent Loctite scattered outside the workpiece hole 2 from scattering and adhering to a region other than the region (inner periphery of the workpiece hole 2) where Loctite is to be applied on the workpiece 1, thereby improving the quality of the workpiece 1. It is possible to secure. Furthermore, since Loctite scattered outside the workpiece hole 2 is scattered inside the cover member 14, it can be collected through the return passage 16, and waste of Loctite can be suppressed.

[Second Embodiment]
Below, the coating device 20 which is 2nd embodiment of the coating device which concerns on this invention is demonstrated with reference to drawings.
In addition, since the coating device 20 has substantially the same configuration as the coating device 10 of the first embodiment, different parts will be described in detail below, the same reference numerals are given to the same members, and the detailed description and The description of the effect etc. accompanying it is abbreviate | omitted.

As shown in FIG. 3, a weight 11d is fixed inside the ejection part 11a, and the weight 11d rotates together with the ejection part 11a. The weight 11d has a predetermined weight and is disposed on the opposite side of the ejection portion 11a from the side where the nozzle hole 11c is formed with the axis of the rotor 11 as the center. In the present embodiment, the weight 11d is disposed at a position facing the nozzle hole 11c across the axis of the rotor 11.
In addition, the ejection portion 11a is configured to be freely rotatable around the shaft portion 11b when not being driven to rotate by the rotating device 12.
With this configuration, when rotation of the rotor 11 by the rotating device 12 is stopped, gravity acts on the weight 11d, so that the weight 11d naturally rotates so as to come to the lowest point on the rotation locus. . Thereby, the nozzle hole 11c of the rotor 11 comes to the uppermost point on the rotation locus | trajectory of the nozzle hole 11c, and the nozzle hole 11c comes to the upper end part of the ejection part 11a. The posture of the rotor 11 at this time is set as a stop posture (see FIG. 3).

It is assumed that Loctite is sequentially applied to each workpiece 1 flowing through the line through the steps (1) to (4) described in the first embodiment using the coating apparatus 20.
At this time, after the work of (4) is finished and before the work of (1) is started on the work 1 flowing through the line next time, that is, when Loctite is not applied to the inner periphery of the work hole 2, the rotor 11 is stopped, and the rotor 11 is in the stop posture. As a result, since the opening of the nozzle hole 11c is located at the upper end of the side surface of the ejection portion 11a when not applied, it is possible to prevent Loctite remaining in the rotor 11 from flowing out through the nozzle hole 11c, and the Loctite droops. It is possible to prevent falling.
Further, since it is possible to prevent Loctite remaining in the rotor 11 from flowing out through the nozzle hole 11c, Loctite remaining in the rotor 11 is applied to the inner periphery of the workpiece hole 2 of the next workpiece 1 flowing through the line. It is possible to suppress the waste of Loctite. Further, the use of Loctite can be suppressed without using the return passage 16 as in the first embodiment, and the apparatus configuration can be simplified.

  Although only one nozzle hole 11c is formed in the ejection part 11a as described above, a plurality of nozzle holes 11c are formed in the ejection part 11a by appropriately increasing the number of rotations of the rotor 11 per unit time. The same amount of Loctite can be ensured, and Loctite can be reliably applied (see FIG. 4).

Further, the configuration of the coating apparatus 10 of the first embodiment and the configuration of the coating apparatus 20 of the second embodiment are appropriately combined, and the rotor 11, the rotation device 12, the main body 13, the cover member 14, the elastic member 15, and the return You may comprise the coating device provided with the channel | path 16. FIG. In this case, a weight 11 d is fixed to the ejection portion 11 a of the rotor 11.
According to this coating apparatus, the cover member 14 is moved from the nozzle hole 11c of the rotor 11 until the work (1) is started on the next work 1 flowing through the line after the work (4) is finished. Since the rotor 11 is in the projecting state and the rotor 11 is in the stopped posture, it is possible to more reliably prevent the Loctite remaining on the rotor 11 from dripping.

DESCRIPTION OF SYMBOLS 1 Work 2 Work hole 10.20 Coating apparatus 11 Rotor 11c Nozzle hole 14 Cover member 11d Weight

Claims (4)

A rotor that is rotatably supported and has a nozzle hole that ejects a flowable material;
The fluid material is applied to the inner periphery of the work hole by rotating the rotor in a state in which the nozzle hole forming place where the nozzle hole is formed in the rotor enters the work hole formed in the work. A coating device,
The nozzle hole forming portion is supported so as to be movable between a posture surrounding the nozzle hole forming portion and a posture not surrounding the nozzle hole forming portion, and when the rotor enters the work hole. A coating apparatus comprising a cover member that is in a posture that does not surround the periphery and that surrounds the periphery of the nozzle hole forming portion when the rotor is in a state of being retracted from the work hole.   The coating apparatus according to claim 1, further comprising a return passage that communicates a space surrounded by an inner peripheral surface of the cover member and a means for collecting the fluid material.   The cover member has a tip shape corresponding to a shape of the opening of the work hole, and the tip portion touches the opening peripheral edge of the work hole when the rotor enters the work hole. The coating apparatus according to claim 1, wherein the coating apparatus is in a contact posture. A rotor that is rotatably supported and has a nozzle hole that ejects a flowable material;
The fluid material is applied to the inner periphery of the work hole by rotating the rotor in a state in which the nozzle hole forming place where the nozzle hole is formed in the rotor enters the work hole formed in the work. A coating device,
The rotor rotates together with the rotor by being fixed to the rotor, and is arranged on the opposite side of the rotor from the side where the nozzle hole is formed around the axis of the rotor, and rotates by its own weight when the rotor does not rotate. A coating device having a weight that comes to the lowest point on the trajectory.

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