JP2013230441A - Coating agent coating apparatus and coating agent coating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of liquid stagnation in a contact part of a workpiece W and a supporting member supporting the workpiece W during drying the workpiece W in a drying chamber, in an adhesive coating apparatus coating an adhesive on a surface of the workpiece W by submerging the workpiece W in the adhesive and thereafter drying the same in the drying chamber.SOLUTION: A support state of the workpiece W is changed from a lower part support state in which the workpiece W is supported at a first prescribed part X1 by a lower part support plate 31 to an upper part support state in which the workpiece W is supported at a second prescribed part X2 by an upper part support plate 32, when drying the workpiece W in the drying chamber.

Description

  The present invention belongs to a technical field related to a coating agent coating apparatus and a coating agent coating method.

  Conventionally, as a device for applying adhesive to the surface of machine parts, after applying the adhesive to the workpiece surface by immersing the workpiece in the adhesive stored in the adhesive tank, the adhesive on the workpiece surface is dried. What was made to dry with is known. In this type of coating agent coating apparatus, there is a problem that when the workpiece is pulled up from the adhesive tank, a liquid pool is formed on the surface of the workpiece where the adhesive is partially applied thickly. Various technologies have been proposed so far.

  For example, in the apparatus shown in Patent Document 1, the thickness of the adhesive applied in one application operation is reduced by repeating a series of processes in which the work is dipped in an adhesive and then dried multiple times, thereby reducing the thickness of the work. Prevents liquid pooling on the surface. In this apparatus, a conveyance belt is used for conveying a workpiece. A pair of L-shaped hangers for holding a work are attached to the conveyor belt. The workpiece has a halved cylindrical shape, and is set on the horizontal portion of the hanger with the convex curved surface facing upward.

JP 2009-136780 A

  However, in the conventional coating agent coating apparatus shown in Patent Document 1, a liquid pool generated when the workpiece is pulled up from the adhesive tank can be suppressed, but the workpiece and the hanger are being dried while the workpiece is being dried by the drying device. The liquid pool generated at the contact portion cannot be eliminated.

  This liquid pool is formed by undried adhesive flowing down along the work surface due to its own weight, and firmly adheres to the hanger by drying. For this reason, when the work after drying is pulled away from the hanger, only the portion of the adhesive layer on the work surface where the liquid pool has occurred is caught on the hanger side and peeled off. As a result, there is a problem that only a part of the work surface where the adhesive is peeled is recessed, or conversely, a convex piece remains around the work surface.

  For this reason, for example, when holding the workpiece after drying with a robot hand and putting it into the parts feeder, the above-mentioned uneven surface portion of the workpiece is gripped by the robot hand, and the chuck abnormality of the workpiece occurs, There is a problem that the work put into the parts feeder by the robot hand is clogged in the feeder due to the unevenness of the surface, and the number of chocolate stops on the production line increases.

  The present invention has been made in view of such a point, and an object of the present invention is to contact a portion between a workpiece and a support member that supports the workpiece when the workpiece is immersed in a coating agent and then dried. It is an object of the present invention to provide a coating agent coating apparatus and a coating agent coating method that can prevent liquid from being pooled.

  1st invention is a conveying means which conveys along a predetermined conveyance path | route while supporting a workpiece | work, The coating agent tank provided in the said conveyance path | route, and the coating agent for immersing the said workpiece | work was stored, A coating unit that includes a drying unit that is provided downstream of the coating agent tank in the conveyance path and that dries the coating agent applied to the surface of the workpiece by immersing the workpiece in the coating agent. set to target.

  The transport means includes a first support member for supporting the workpiece at a first predetermined location, and a second support member for supporting the workpiece at a second predetermined location different from the first predetermined location. The workpiece is supported by the second support member from the first support state in which the workpiece is supported by the first support member during the drying of the workpiece in the drying unit. It was configured to switch to the second support state.

  According to the first invention, during the drying of the workpiece in the drying section, the workpiece is supported by the conveying means, and the workpiece is supported by the second support member from the first support state where the workpiece is supported by the first support member. It is possible to switch to the second support state. In the following description, when it is not necessary to distinguish between the first support member and the second support member, they are simply referred to as support members.

  Accordingly, the contact portion between the support member and the workpiece (the support portion of the workpiece by the support member) is not fixed at a fixed location during the drying of the workpiece, and thus liquid is collected in the contact portion between the workpiece and the support member. It is possible to suppress the occurrence of (coating agent pool). That is, according to the present invention, the coating agent collected in the contact portion between the workpiece and the first support member during drying falls as droplets when the workpiece is supported again by the second support member. As in the prior art, it is possible to prevent the coating agent from remaining as a liquid pool in the contact portion between the workpiece and the support member and drying and solidifying.

  In a second aspect based on the first aspect, the conveying means supports the workpiece in the first support state until a predetermined time has elapsed after the drying section starts drying the workpiece. On the other hand, when the predetermined time has elapsed, the support state of the workpiece is switched from the first support state to the second support state, and the second predetermined state which is a support portion of the work in the second support state. The location is located above the first predetermined location, which is the location where the workpiece is supported in the first support state.

  According to the second invention, the support state of the workpiece is maintained in the first support state by the conveying means until the predetermined time elapses after the drying of the workpiece is started in the drying section. And when predetermined time passes after drying of a workpiece | work in a drying part starts, the support state of a workpiece | work is switched from the said 1st support state to a 2nd support state by a conveyance means.

  Here, since the coating agent on the workpiece surface flows down along the surface due to its own weight, the drying rate of the coating agent is higher on the upper end side of the workpiece than on the lower end side. The inventors pay attention to this point and set the workpiece support location (second predetermined location) in the second support state above the workpiece support location (first predetermined location) in the first support state (that is, the first support location). It was positioned on the fast drying side. According to this, when a predetermined time has passed since the drying of the workpiece has started, the workpiece support location can be switched from the first predetermined location to the second predetermined location where the drying of the coating agent has already been completed.

  As a result, the contact time between the support member and the undried portion of the work can be shortened as much as possible. Therefore, the coating agent can be shaken by re-supporting the work from the first support member to the second support member during the drying of the work. Combined with the dropping effect, it is possible to more reliably suppress the occurrence of liquid pooling at the contact portion between the workpiece and the support member. Therefore, it is possible to reliably obtain the same effect as that of the first aspect of the invention.

  According to a third invention, in the first or second invention, the second support member is connected to the first support member so as to be movable up and down, and the conveying means is connected to the second support member. The support state of the workpiece can be switched between the first support state and the second support state by moving the second support member up and down with respect to the first support member by the link mechanism. It was supposed to be.

  According to the third invention, the support state of the workpiece can be switched between the first support state and the second support state simply by moving the second support member up and down with respect to the first support member by the link mechanism. . Therefore, the support state of the workpiece can be switched with a simple configuration without using a robot hand.

  According to a fourth invention, in any one of the first to third inventions, the work is made of a member whose upper surface is concave upward, and the first and second predetermined positions are the work of the lower surface of the work. It shall be located in parts other than the lower end edge of.

  According to the fourth aspect of the invention, it is possible to prevent as much as possible a liquid pool from occurring at the contact portion between the workpiece and the support member during the drying of the workpiece.

  That is, for example, when the work is constituted by a member whose upper surface is concave upward (for example, a half cylinder), the coating agent applied to the lower surface of the work flows down along the lower surface of the work and finally flows. Gather at the lower edge of the workpiece. Therefore, when the lower end edge of the work is supported by the support member, a liquid pool is likely to occur at the contact portion between the work and the support member. On the other hand, in the fourth aspect of the invention, both of the work support positions (first and second predetermined positions) of the work by the first and second support members are at the lower end edge of the work, which is the final arrival point of the coating agent. However, since it is set on the lower surface of the work positioned in the path along which the coating agent flows down, it is possible to reliably suppress the occurrence of a liquid pool at the contact portion between the work and the support member.

  The fifth invention is directed to a coating method in which a coating agent is applied to the surface of the workpiece by immersing the workpiece in the coating agent.

  And it is provided with the immersion process which immerses a work in a coating agent, and the drying process which dries in the state where the above-mentioned work was supported by the support member after the above-mentioned immersion process. The support location is switched from the first predetermined location to a second predetermined location different from the first predetermined location.

  According to the fifth aspect, the same effect as that of the first aspect can be obtained.

  As described above, according to the coating agent coating apparatus and the coating agent coating method of the present invention, during the drying of the workpiece by the drying device, a liquid pool is generated at the contact portion between the workpiece and the support member that supports the workpiece. It becomes possible to prevent reliably.

It is a side view which shows the adhesive agent coating device which concerns on embodiment of this invention. It is a front view which shows the support unit which supports a workpiece | work. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. It is the figure which looked at the support location of a workpiece | work, (a) The figure seen from the lower side of the workpiece | work, (b) The figure seen from the axial direction (device width direction) of the workpiece | work. FIG. 6 is a view in the direction of the arrow VI in FIG. 1 showing the configuration of the workpiece collection unit. It is explanatory drawing for demonstrating the operation | movement at the time of the raise of the support unit which supports a workpiece | work, Comprising: (a) shows the state just before a support unit passes an intermediate | middle plate, (b) is an intermediate | middle support unit. The state after passing the plate is shown. It is explanatory drawing for demonstrating the operation | movement at the time of the descent | fall of the support unit which supports a workpiece | work, Comprising: (a) shows the state just before a support unit passes a lower plate, (b) is a lower support unit. The state after passing the plate is shown. It is a side view which shows the conventional workpiece | work support structure.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Overall configuration>
FIG. 1 shows an adhesive application device (application agent application device) 1 according to an embodiment of the present invention. The adhesive application device 1 immerses the workpiece W in an adhesive (application agent), thereby allowing the workpiece W to be immersed in the adhesive. An adhesive is applied to the surface of the film. The workpiece W to which the adhesive is applied is conveyed to a vulcanization molding apparatus (not shown), and rubber is vulcanized and molded on the surface of the workpiece by the vulcanization molding apparatus. The adhesive is used to improve the adhesion between the rubber and the workpiece.

  The adhesive coating apparatus 1 holds and transports a workpiece supply unit 5 that sets a workpiece W at a predetermined workpiece supply position on the conveyance path S, and a workpiece W that is set at the workpiece supply position by the workpiece supply unit 5. The transfer unit 10, the adhesive tank 20 in which an adhesive for immersing the workpiece W is stored, the drying chamber 40 for drying the adhesive applied to the surface of the workpiece W, and the application of the adhesive are completed. And a workpiece recovery unit 50 for recovering the workpiece W that has been recovered.

  The adhesive application device 1 has a device main body 3 formed by combining frames 2. The apparatus main body 3 is vertically partitioned by a partition plate 2a extending in the horizontal direction. The upper space is a drying chamber 40 with the partition plate 2a interposed therebetween, and the lower space accommodates the adhesive tank 20. It is the accommodation chamber 4 for this purpose. The adhesive tank 20 includes four tanks, a first and second undercoat tanks 20a and 20b, and a first and second topcoat tanks 20c and 20d, and the adhesive is liquid or gel in each of the tanks 20a to 20d. It is stored in the state of. The undercoat tanks 20a and 20b and the overcoat tanks 20c and 20d are the same except for the concentration component of the adhesive stored in each tank. In the following description, the left side and the right side in FIG. 1 are defined as the front side and the rear side in the apparatus front-rear direction, respectively, and the back side and the front side in the direction perpendicular to the paper surface in FIG. It is defined as

  The workpiece supply unit 5 is disposed on the front side of the apparatus main body unit 3 and is arranged in a row in the apparatus width direction as a set of four workpieces W input from a workpiece input unit (not shown). Set to.

  The transport unit 10 simultaneously supports (holds) the four works W arranged in a row set at the work supply position and transports them along a predetermined transport path S. Specifically, the transport unit 10 is disposed across the width direction of the apparatus main body 3 and supports a plurality of support units 100 that can simultaneously support four workpieces W, and the left and right ends of each support unit 100. Left and right chain belts 12 are provided. A plurality of rotating shafts 13 extending in the apparatus width direction are disposed in the apparatus main body 3, and the left and right chain belts 12 are respectively chain gears (sprockets) 11 at both left and right ends of the plurality of rotating shafts 13. It is laid around.

  The chain gear 11 includes a plurality of upper chain gears 11 a disposed at an upper position in the drying chamber 40 and a plurality of lower chain gears 11 b disposed at an upper position of the adhesive tank 20 in the storage chamber 4. And a driving gear 11c for applying a driving force to the chain belt 12 and three tension gears 11d to 11f for applying a tension to the chain belt 12.

  The plurality of support units 100 are arranged at intervals in the traveling direction (length direction) of the chain belt 12, thereby allowing the adhesive to be applied to the workpiece W continuously. Yes.

  As shown in FIG. 2, each support unit 100 has four hanger units 30 arranged in the apparatus width direction, and each hanger unit 30 receives and supports the workpiece W from below to support the four hanger units 30. Supports the workpiece W simultaneously. The workpiece W has a half-cylindrical shape. Specifically, the lower surface of the workpiece W is a curved surface having an arcuate concave section and the upper surface of the workpiece W is a cylindrical curved surface protruding upward. Yes. Each hanger unit 30 includes a pair of left and right lower support plates 31 for supporting a first predetermined position X1 (see FIG. 5) located near the lower end of the workpiece W, and a pair of lower support plates 31 (devices). And an upper support plate 32 for supporting a second predetermined location X2 located above the first predetermined location on the workpiece W. Each hanger unit 30 has a lower support state (corresponding to a first support state) in which the work W is supported by a pair of lower support plates 31 and an upper support state (second state) in which the work W is supported by a pair of upper support plates 32. The link mechanism 60 (refer to FIGS. 3, 7, and 8) can be switched to the support state.

  As shown in FIG. 5, the first predetermined place X1 is four places located at the lower end portion of the inner peripheral surface of the workpiece W and at both end portions in the axial direction. The second predetermined place X2 is four places located at the upper end of the inner peripheral surface of the workpiece W. The second predetermined portion X2 is located above the first predetermined portion X1 and inside in the axial direction.

  Returning to FIG. 1, the transport path S of the support unit 100, that is, the transport path S of the workpiece W, includes a supply transport path S <b> 1, a work processing transport path S <b> 2 following the supply transport path S <b> 1, and a work processing transport path. It consists of a discharge transport path S3 following S2.

  The supply conveyance path S1 is formed between the second upper chain gear 11a counted from the front side and the workpiece supply unit 5, and guides the workpiece W to the workpiece processing conveyance path S2. The workpiece processing transport path S2 is formed between the second upper chain gear 11a counted from the front side and the driving gear 11c. In the work processing transport path S2, a plurality of upper chain gears 11a and a plurality of lower chain gears 11b are arranged in a staggered manner, and thereby, five descending transport paths from the drying chamber 40 toward the storage chamber 4 are performed. K1 to K5 and four ascending transport paths J1 to J4 heading from the storage chamber 4 to the drying chamber 40 are alternately arranged in the front-rear direction and formed in a zigzag shape. The discharge transport path S3 is formed between the drive gear 11c and the work collection unit 50, and guides the work W after passing through the work processing transport path S2 to the work collection unit 50. In the following description, when the lowering transport paths K1 to K5 are not particularly distinguished, they are simply referred to as the lowering transport path K. Similarly, when the ascending transport paths J1 to J4 are not particularly distinguished, the ascending transport paths are simply referred to as the lowering transport paths K1 to J4. Call it J.

  As shown in FIG. 6, the workpiece collection unit 50 includes four discharge units 51 that hook and discharge four workpieces W supported (held) by the support unit 100, and a storage box 52 that stores the workpieces W. , And an inclined plate 53 that slides and conveys the work W discharged by the discharge unit 51 to the storage box 52.

  Specifically, a discharge claw 51 a branched into three is formed at the tip of each discharge portion 51. Then, when the support unit 100 is lowered, the discharge claws 51a branched into three of the discharge portions 51 are hooked on both end portions and the central portion of each work W in the axial direction, whereby each work W is supported by the support unit. Separated from 100 and discharged.

  In the adhesive application device 1 configured as described above, the workpiece W set at the workpiece supply position by the workpiece supply unit 5 is supported by the support unit 100 in the supply conveyance path S1 (see FIG. 1). Then, the workpiece is conveyed along the workpiece processing conveyance path S2 following the supply conveyance path S1. In the work processing transport path S2, the work W is transported in a zigzag manner along the descending transport paths K1 to K5 and the ascending transport paths J1 to J4. As a result, the workpiece W is dried chamber 40 → first undercoat tank 20a → drying chamber 40 → second undercoat tank 20b → drying chamber 40 → first upper coat tank 20c → drying chamber 40 → second upper coat tank 20d → drying chamber 40. Thus, the drying chamber 40 and the adhesive tank 20 are alternately passed.

  Thus, the process of immersing the workpiece W in the adhesive tank 20 and drying the surface thereof is repeated four times to complete the application of the adhesive to the surface of the workpiece W. Thus, by dividing the application work of the adhesive to the workpiece W into a plurality of times, the thickness of the adhesive applied in one application work can be reduced, and the thickness of the adhesive applied to the surface of the work W can be reduced. It can be made uniform.

  Then, the workpiece W on which the application of the adhesive has been completed is conveyed downstream along the workpiece discharge path S3 following the workpiece processing conveyance path S2, and is collected by the workpiece collection unit 50.

  A trapezoidal intermediate cam plate 70 is provided in each of the intermediate portions in the vertical direction of the ascending transfer paths J1 to J4 in the work processing transfer path S2. Each intermediate cam plate 70 is configured to act on the link mechanism 60 provided in the support unit 100 to switch the support state of the workpiece W by each hanger unit 30 from the lower support state to the upper support state. A trapezoidal lower cam plate 80 is provided at each of the lower end portions of the four descending conveyance paths K2 to K5 excluding the most descending conveyance path K1. Each lower cam plate 80 is disposed in the vicinity of the communication hole 25 between the drying chamber 40 and the storage chamber 4, and acts on the link mechanism 60 provided in the support unit 100, whereby the workpiece W by each hanger unit 30. The support state is switched from the upper support state to the lower support state. Both the intermediate cam plate 70 and the lower cam plate 80 are fixed to a fixing member (not shown) constituting the apparatus main body 3.

  According to this configuration, the workpiece W is immersed in the adhesive tank 20 while being supported by the hanger unit 30 in the lower support state, and then the workpiece W rises along the rising conveyance path J and enters the drying chamber 40. After that, when the predetermined time has elapsed, the intermediate cam plate 70 acts on the link mechanism 60, whereby the support state of the workpiece W by the hanger unit 30 is switched from the lower support state to the upper support state. After that, after the workpiece W further rises and reaches the upper end of the ascending conveyance path J, it turns downward and reaches the lower end of the descending conveyance path K (that is, near the communication hole 25 between the drying chamber 40 and the storage chamber 4). When reaching, the lower cam plate 80 acts on the link mechanism 60, whereby the support state of the workpiece W by the hanger unit 30 is switched from the upper support state to the lower support state. And the workpiece | work W is conveyed by the following adhesive agent tank 20 (The workpiece | work collection | recovery part 50 after passing through the adhesive agent tank 20d), with the hanger unit 30 supporting in the lower support state.

<Details of support unit>
Next, the configuration of the support unit 100 will be described in detail with reference to FIGS.

  FIG. 2 is a view of the support unit 100 as viewed from the front side of the apparatus, and the link mechanism 60 is omitted for easy viewing. 3 is a cross-sectional view taken along the line III-III in FIG. 2 with the upper support plate 32 omitted, and FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. It is the figure which abbreviate | omitted and showed the mechanism 60. FIG.

  As shown in FIG. 2, the support unit 100 is configured by connecting four hanger units 30 with a pair of upper and lower connecting shafts 33.

  As described above, each hanger unit 30 includes a pair of lower support plates 31 and a pair of upper support plates 32 disposed between the pair of lower support plates 31. The surfaces of the lower support plate 31 and the upper support plate 32 are entirely covered with a low friction resin, and in the present embodiment, the low friction resin is a fluororesin. The upper support plate 32 is welded to both left and right side surfaces of a rectangular block-shaped vertical member 35 extending in the vertical direction. The vertical member 35 (that is, the upper support plate 32) is slidably supported by the lower support plate 31 via two support shafts 34 arranged vertically. The hanger unit 30 moves the two support shafts 34 up and down by a link mechanism 60 to be described later, so that the lower support plate 31 supports the lower end portion (first predetermined position X1) of the inner peripheral surface of the workpiece W. The state and the upper support state in which the upper support plate 32 supports the upper end portion (second predetermined portion X2) of the inner peripheral surface of the work W are configured to be switchable.

  As shown in FIG. 3, the lower support plate 31 includes a vertical portion 31a extending in the vertical direction, a horizontal portion 31b extending horizontally from the lower end portion of the vertical portion 31a toward the front side of the apparatus, and a front end portion of the horizontal portion 31b. A receiving portion 31c that extends upward from the (tip portion) and receives and supports the workpiece W from below.

  The vertical portion 31a includes a rectangular lower plate 31e that is long in the vertical direction and an upper plate 31f that is wider than the lower plate 31e. The upper plate portion 31f is formed with a slide hole 31g through which the two support shafts 34 are slidably inserted in the vertical direction. The slide hole 31g has a long hole shape extending in the up-down direction, and is formed at the center in the front-rear direction of the upper plate portion 31f. A fixing pin 64 penetrates and is fixed to the rear and lower corners of the upper plate portion 31f. In addition, two insertion holes 31k through which the connection shaft 33 is inserted are formed at the front end of the upper plate portion 31f.

  The upper end of the receiving portion 31c branches in a V shape. The receiving portion 31c is configured to support the workpiece W by line contact (point contact when viewed from the workpiece axis direction) by bringing the tip of each branch portion 31v into contact with the inner peripheral surface of the workpiece W. Has been. In the present embodiment, the sandwiching angle between the two branch portions 31v is set to 110 ° to 120 °. The tip ends of the two branch portions 31v are pointed at an acute angle, but may be formed in a curved shape that is in close contact with the inner peripheral surface of the workpiece W, for example.

  As shown in FIG. 4, the upper support plate 32 includes a horizontal portion 32b extending horizontally from the lower end portion of the vertical member 35 toward the front side of the apparatus, and extending upward from the front side end portion of the horizontal portion 32b to lower the work W downward. A receiving portion 32c for receiving and supporting from the above. Two insertion holes 32 g through which the two support shafts 34 are inserted are formed in the upper part of the vertical member 35. The two insertion holes 32g are formed at predetermined intervals in the vertical direction.

  As with the receiving portion 31 c of the lower support plate 31, the upper end portion of the receiving portion 32 c of the upper support plate 32 branches in a V shape. The receiving portion 32c is configured to support the workpiece W by line contact (point contact as viewed from the workpiece axis direction) by bringing the tip of each branch portion 32v into contact with the inner peripheral surface of the workpiece W. ing. The tip ends of the two branch portions 32v are sharpened at an acute angle, but may be formed in a curved shape that is in close contact with the inner peripheral surface of the workpiece W, for example. The sandwiching angle θ2 of the two branch portions 32v is smaller than the sandwiching angle θ1 of the receiving portion 32c of the lower support plate 31, and is set to 90 ° to 95 ° in this embodiment.

  The link mechanism 60 includes link members 61 (only the left link member 61 is shown in FIGS. 3, 7, and 8) disposed on the left and right sides of the pair of lower support plates 31, and extends in the apparatus width direction. It has a connecting link shaft 62 that connects the left and right link members 61, and an input link shaft 63 that also extends in the apparatus width direction and functions as a load input portion for the link mechanism 60. As shown in FIG. 2, the input link shaft 63 extends across the four hanger units 30 when viewed from the front side of the apparatus.

  In the present embodiment, three link members 61 are provided. One end of the first link member 61 a is rotatably connected to the upper support shaft 34, and the other end is rotatably connected to the connection link shaft 62. One end of the second link member 61b is rotatably connected to the fixing pin 64 fixed to the lower support plate 31, and the other end is rotatably connected to the connection link shaft 62. One end of the third link member 61 c is rotatably fixed to the connection link shaft 62, and the other end is fixed to the input link shaft 63.

  Next, the operation of the link mechanism 60 when the support unit 100 (four hanger units 30) passes through the intermediate cam plate 70 provided in the ascending conveyance path J will be described with reference to FIG.

  First, in a state before the support unit 100 passes through the intermediate cam plate 70 (the state shown in FIG. 7A), the work W is supported by the hanger unit 30 in a lower support state. Thereafter, when the support unit 100 rises along the ascending conveyance path J, the input link shaft 63 of the link mechanism 60 rises while abutting on the lower inclined surface 70a of the intermediate cam plate 70 and sliding on the inclined surface 70a. . Accordingly, since the input link shaft 63 is pushed downward by the lower inclined surface 70a of the intermediate cam plate 70, the third link member 61c rotates in the clockwise direction of FIG. 7 with the input link shaft 63 as a fulcrum. . By the rotation of the third link member 61c, the connection link shaft 62 connected to the other end of the third link member 61c moves upward while drawing an arc locus, and in conjunction with this, the second link member 61b is moved. The first link member 61a rotates about the fixed pin 64 in the counterclockwise direction of FIG. 7 and, at the same time, the first link member 61a rotates about the connecting link shaft 62 in the clockwise direction of FIG. . As a result, as shown in FIG. 7B, the pair of upper support plates 32 connected to the upper support shaft 34 is raised, and as a result, the upper end portion of the branching portion 32v of the upper support plate 32 is supported by the lower support. It protrudes above the upper end of the branch part 31v of the plate 31 (see FIG. 7B). As a result, the workpiece W is supported by the upper support plate 32 instead of the lower support plate 31, and the support state of the workpiece W by the hanger unit 30 is switched from the upper support state to the lower support state.

  Next, an operation when the support unit 100 passes through the lower cam plate 80 provided in the descending conveyance path K will be described with reference to FIG.

  As shown in FIG. 8A, in a state before the support unit 100 (four hanger units 30) passes through the lower cam plate 80, the workpiece W is supported by the hanger unit 30 in an upper support state. Thereafter, when the support unit 100 is lowered along the descending conveyance path K, the input link shaft 63 of the link mechanism 60 is brought into contact with the upper inclined surface 80a of the lower cam plate 80 and lowered while sliding on the inclined surface 80a. Here, a guide plate 81 is provided on the upper side of the lower cam plate 80, and the input link shaft 63 is guided between the lower end surface 81 a of the guide plate 81 and the upper inclined surface 80 a of the lower cam plate 80. Thus, the input link shaft 63 is prevented from separating upward from the upper inclined surface 80a of the lower cam plate 80.

  Then, as the input link shaft 63 slides down on the upper inclined surface 80a of the lower cam plate 80, the third link member 61c rotates counterclockwise in FIG. 8 with the input link shaft 63 as a fulcrum. Due to the rotation of the third link member 61c, the connecting link shaft 62 connected to the other end of the third link member 61c moves downward while drawing an arc locus, and in conjunction with this, the second link member 61b is moved. 8 rotates around the fixing pin 64 in the clockwise direction of FIG. 8, and at the same time, the first link member 61a rotates around the connecting link shaft 62 in the counterclockwise direction of FIG. Slide down along 31g. As a result, the pair of upper support plates 32 connected to the upper support shaft 34 moves downward. As a result, the workpiece W is supported by the lower support plate 31 instead of the upper support plate 32, and the support state of the workpiece W by the hanger unit 30 is switched from the upper support state to the lower support state.

<Effect>
As described above, in the above embodiment, the intermediate cam plate 70 provided in the ascending conveyance path J is provided in the support unit 100 when a predetermined time has elapsed after the support unit 100 has entered the drying chamber 40. By contacting (acting) the input link shaft 63 of the link mechanism 60, the support state of the workpiece W by each hanger unit 30 is switched from the lower support state to the upper support state.

  Thus, after the workpiece W enters the drying chamber 40, the workpiece W is supported by the lower support plate 31 until a predetermined time elapses. When the predetermined time has elapsed, the workpiece W is supported by the upper support plate 32. Can be supported again. Therefore, when the workpiece W is supported again from the lower support plate 31 to the upper support plate 32, the adhesive accumulated in the contact portion between the lower support plate 31 (the branch portions 31v of the lower support plate 31) and the workpiece W is liquid. Can be shaken off in the shape of the target. Therefore, it is possible to prevent the adhesive from remaining as a liquid pool at the contact portion between the workpiece W and the lower support plate 31 and drying and solidifying.

  In the above embodiment, since the adhesive on the surface of the work W flows down due to its own weight, paying attention to the fact that the drying speed of the adhesive is faster on the upper end side of the work W than on the lower end side. When a predetermined time has elapsed after the start of drying, the support location of the workpiece W is switched from the lower end (first predetermined location X1) to the upper end (second predetermined location X2). According to this, during the drying of the workpiece W, the supporting portion of the workpiece W is switched to the portion where the drying of the adhesive is finished, and the occurrence of a liquid pool due to continuing to support the undried portion on the surface of the workpiece W is generated. It can be avoided. In order to ensure this effect, the predetermined time is set longer than the time from the start of drying of the workpiece W until the adhesive applied to the second predetermined portion X2 finishes drying. Is preferred.

  Moreover, in the said embodiment, the support location (2nd predetermined location) of the workpiece | work W by the upper support plate 32 and the support location (1st predetermined location) of the workpiece | work W by the lower support plate 31 are both inner periphery of the workpiece | work W. It is located on a surface (a portion of the lower surface of the workpiece W other than the lower edge of the workpiece).

  Thereby, it is possible to more reliably prevent the liquid pool from being generated at the contact portion between the workpiece W and each of the support plates 31 and 32. That is, when supporting the half-cylindrical workpiece W, the lower end edges of the workpiece W are usually supported by the hangers 90 with the convex curved surface of the workpiece W facing upward as shown in FIG. However, in this case, the undried adhesive flows down along the surface of the workpiece W and finally gathers at the lower edge of the workpiece W, so that a liquid pool is likely to occur at the contact portion between the workpiece W and the hanger 90. On the other hand, in the said embodiment, the workpiece | work location which is located in the path | route which the adhesive agent flows into instead of the lower end edge of the workpiece | work W which is the final arrival point of the adhesive agent for the support location of the workpiece | work W by each support plates 31 and 32. By setting it to the inner peripheral surface of W, it is possible to make it difficult for a liquid pool to occur at the contact portion between the workpiece W and the support member (the support plates 31 and 32 in the above embodiment) as compared with the conventional case.

  Moreover, in the said embodiment, the whole surface of each support plate 31 and 32 is coat | covered with the fluorine resin which is a low friction resin. Thereby, the adhesive accumulated in the contact portion between the workpiece W and each of the support plates 31 and 32 can be repelled by the fluororesin of each of the support plates 31 and 32 and flowed down. Therefore, it is possible to further reliably prevent the liquid pool from being generated at the contact portion between the workpiece W and each of the support plates 31 and 32.

  In the above embodiment, the upper support plate 32 and the lower support plate 31 are configured to support the workpiece W by line contact.

  Thereby, compared with the case where the workpiece | work W and each support plate 31 and 32 surface-contact, the contact area of the workpiece | work W and each support plate 31 and 32 can be reduced, and by extension, the workpiece | work W and each each It is possible to reduce the amount of adhesive that accumulates at the contact portions with the support plates 31 and 32 and suppress the occurrence of liquid pool as much as possible.

  Further, in the above embodiment, the upper support plate 32 is connected to the lower support plate 31 so as to be movable up and down, and the support unit 100 is connected to the upper support plate by the link mechanism 60 connected to the upper support plate 32. The support state of the workpiece W is configured to be switchable between the upper support state and the lower support state by raising and lowering 32 with respect to the lower support plate 31.

  According to this configuration, the support state of the workpiece W can be switched with a simple configuration without using a robot hand.

<Other embodiments>
The configuration of the present invention is not limited to the above embodiment, but includes various other configurations. That is, in the above embodiment, an example in which the coating agent is an adhesive is shown, but the present invention is not limited to this. For example, a rust preventive agent, an electrodeposition paint when performing cationic electrodeposition coating, and a silicon coating. It may be a coating agent or the like when performing.

  Moreover, in the said embodiment, although the whole surface of each support plate 31 and 32 is coat | covered with a low friction resin, it is not restricted to this, For example, branch part 31v of each support plate 31 and 32, Only the tip of 32v may be covered with a low friction resin.

  Moreover, in the said embodiment, although the said workpiece | work W has comprised the half cylinder shape, it is not restricted to this, For example, you may comprise cross-sectional mountain shape and cross-sectional trapezoid shape.

  The present invention is useful for a coating agent coating apparatus and a coating agent coating method, and is particularly useful when the shape of a workpiece that is an object to be coated is a half cylinder.

W Work 1 Adhesive application device (Coating agent application device)
X1 1st predetermined location X2 2nd predetermined location 10 Conveyance part (conveyance means)
12 Chain belt (conveying means)
20 Adhesive tank 30 Hanger unit (conveyance means)
31 Lower support plate 32 Upper support plate 40 Drying chamber (drying section)
60 Link mechanism 100 Support unit (conveying means)

Claims (5)

Conveying means for conveying along a predetermined conveying path while supporting the workpiece, a coating agent tank provided in the conveying path and storing a coating agent for immersing the workpiece, and the coating agent in the conveying path A drying unit provided on the downstream side of the transfer from the tank and drying the coating agent applied to the surface of the workpiece by immersion in the coating agent of the workpiece,
The conveying means is
A first support member for supporting the workpiece at a first predetermined location;
A second support member for supporting the workpiece at a second predetermined location different from the first predetermined location;
During the drying of the work in the drying unit, the support state of the work is switched from the first support state in which the work is supported by the first support member to the second support state in which the work is supported by the second support member. It is comprised as follows. The coating agent coating device characterized by the above-mentioned. The coating agent coating apparatus according to claim 1,
The conveying means supports the work in the first support state until a predetermined time elapses after starting the drying of the work in the drying unit, while supporting the work when the predetermined time elapses. The state is configured to switch from the first support state to the second support state,
The coating agent characterized in that the second predetermined portion, which is the support portion of the workpiece in the second support state, is located above the first predetermined portion, which is the support portion of the work in the first support state. Coating device. In the coating agent application device according to claim 1 or 2,
The second support member is connected to the first support member so as to be movable up and down,
The conveying means raises and lowers the second support member relative to the first support member by a link mechanism connected to the second support member, thereby changing the support state of the work from the first support state to the first support state. A coating agent coating apparatus characterized by being configured to be switchable between a second support state. In the coating agent application device according to any one of claims 1 to 3,
The workpiece is composed of a concave member with the bottom surface
The said 1st and 2nd predetermined location is located in parts other than the lower end edge of this workpiece | work among the lower surfaces of the said workpiece | work. An application method in which a coating agent is applied to the surface of the workpiece by immersing the workpiece in the coating agent,
An immersion step of immersing the workpiece in the coating agent;
A drying step for drying the workpiece in a state supported by a support member after the immersion step;
While drying the workpiece in the drying step, the support location of the workpiece is switched from the first predetermined location to a second predetermined location different from the first predetermined location. .

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