JP2012224939A - Electrodeposition coating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrodeposition coating apparatus capable of favorably improving efficiency of a preparatory work for electrodeposition coating.SOLUTION: A unit for electrodeposition coating includes: a sub-pallet for loading an object for coating thereon; a main pallet to be immersed in an electrodeposition coating solution in an electrodeposition vessel in a state where the sub-pallet is loaded on the main pallet; and a connecting mechanism electrically connecting both of the pallets. The connecting mechanism includes a main pallet side connection portion 51 provided to the main pallet and a sub-pallet side connection portion 31 provided to the sub-pallet. The sub-pallet side connection portion 31 is provided with: rod-shaped members 36 which are electrically connected to the object for coating and also electrically connected to the main pallet side connection portion 51 by being in contact with the main pallet side connection portion 51; base portions 32, 33 rotatably holding the rod-shaped members 36; and a spring member 35 which biases the rod-shaped members 36 to an initial position. The sub-pallet is loaded on the main pallet by biasing force of the spring member 35, whereby the rod-shaped members 36 are turned to a state that the rod-shaped members are pressed to the main pallet side connection portion 51.

Description

  The present invention relates to an electrodeposition coating apparatus used when, for example, electrodeposition coating is applied to building materials used in buildings.

  Some building materials for buildings such as houses (for example, steel materials such as beams and columns) have been subjected to a treatment for corrosion resistance in consideration of improvement in durability. In recent years, the corrosion resistance function has been further improved by performing electrodeposition coating to obtain a coating film by passing an electric current in a state where the building material is immersed in the electrodeposition coating liquid (for example, Patent Document 1). reference).

  When performing electrodeposition coating, the building material to be coated is transported to the electrodeposition tank by a conveyor or the like while being mounted on the pallet, and the pallet is immersed in the electrodeposition coating liquid. A portion of the pallet held by the holder portion of the conveyor is configured to be in a state of being electrically connected to the conveyor by contacting the holder portion and the like.

  In addition, since building materials are heavier, transportation means such as forklifts are often used when carrying various building materials from the previous process to the subsequent process in the manufacturing process at the manufacturer. When using such transportation means, the operator gets off the transportation means after mounting the building material on the pallet, and electrically connects the building material and the pallet manually using a connecting portion such as a conductive wire. . Thus, the building material itself functions as an electrode by electrically connecting the pallet and the building material.

JP 2007-098454 A

  Here, as described above, if it is necessary to get off the transportation means every time the worker carries the building material from the previous process to the coating process, there is a concern that the preparation efficiency when performing electrodeposition coating is reduced. This is not preferable because it can hinder improvement in production efficiency of building materials and the like.

  Such a problem is not limited to the case where electrodeposition coating is applied to building materials of a building, but it is assumed that electrodeposition coating is performed using at least a pallet (for example, a frame of a vehicle), particularly a forklift, etc. It can also occur when the object to be painted is assumed to be transported by other transport means.

  This invention is made | formed in view of the said situation, and it aims at provision of the apparatus for electrodeposition coating which can improve the efficiency of the preparatory work at the time of performing electrodeposition coating suitably.

  Hereinafter, effective means for solving the above-described problems will be described while showing effects and the like as necessary. In the following, for easy understanding, the corresponding configuration in the embodiment of the invention is appropriately shown in parentheses, but is not limited to the specific configuration shown in parentheses.

Means 1. The first pallet (parent pallet) immersed in the electrodeposition coating liquid (electrodeposition coating liquid C) in the electrodeposition tank (electrodeposition tank T) in a state in which the mounted object including the object to be coated (painting object 15) is mounted. 11) and
A pallet side electrode part (parent side connection part 51) provided integrally with the first pallet and serving as an electrode of either a cathode or an anode;
An object integrally provided on the mounted object, electrically connected to the object to be coated, and electrically connected to the pallet side electrode part by contacting the pallet side electrode part. A load-side electrode portion (rod-like body 36),
The mounted object side electrode part is provided at a position in contact with the pallet side electrode part in a state where the mounted object is mounted on the first pallet;
The load is mounted on the first pallet so that the pallet side electrode portion is pressed against the load object side electrode portion, and the load is mounted on the first pallet. Below, the apparatus for electrodeposition coating provided with the press mechanism (press mechanism of the child side connection part 31) comprised so that the press state may be maintained.

  According to the means 1, when the worker mounts the mounted object on the first pallet, the pallet side electrode part is pressed against the mounted object side electrode part, and the pressed state is maintained. In this way, electrical connection is made by mounting the object to be mounted, and if that state is maintained thereafter, fine adjustment of the position of the object to be mounted becomes unnecessary during mounting work, and electrodeposition coating It is possible to suitably improve the efficiency of the preparatory work when performing. In addition, for example, when an object to be loaded is mounted on the first pallet using a transportation means such as a forklift, the operator does not need to get off the transportation means and perform electrical connection manually. Thereby, the efficiency improvement of a series of work of transportation-loading can be expected.

  Since the state is maintained after being in the pressed state, even if it is moved in the painting process or shaken in the electrodeposition tank while the load is mounted on the first pallet, In keeping both the pallet side and the mounted object side electrode portions in contact, the positional displacement of the mounted object can be allowed to some extent. By ensuring the electrical connection in this way, it is possible to make it difficult to cause inconvenience that the electrodeposition coating is not performed well due to the displacement of the mounted object.

Mean 2. The pressing mechanism is
At least one of the pallet side electrode part and the mounted object side electrode part is used as a movable electrode part, and the electrode part is supported, and the pallet side is mounted as the mounted object is mounted on the first pallet. An electrode support portion (base portions 32, 33, etc.) that displaces the movable electrode portion from the initial state before the contact when the electrode portion on the mounting object is in contact with the electrode portion;
When the movable electrode portion is displaced from the initial state, a pressing force generating means (spring) is provided that generates a pressing force so that the load-side electrode portion remains in contact with the pallet-side electrode portion. Electrodeposition coating apparatus according to means 1, characterized in that it has a member 35).

  According to the means 2, at least one of the pallet side electrode part and the mounted object side electrode part is a movable electrode part. The movable electrode part is supported so as to be displaceable from the initial state before the contact (a state where no pressing load is applied) when both electrode parts are in contact with each other by the electrode support part. The pressing force is generated when the portion is displaced with respect to the electrode support portion. That is, at least within the range in which the displacement of the movable electrode portion is allowed, the contact between both electrode portions is maintained by the pressing force. As a result, as shown in the means 1, it is possible to favorably secure the connection state while facilitating the connection between both electrode portions.

Means 3. The electrode support portion rotatably supports the movable electrode portion, and enables the displacement from the initial state by rotating the movable electrode portion.
The electrodeposition coating apparatus according to claim 2, wherein the pressing force generating means is an urging means for urging the movable electrode portion toward the initial state.

  According to the means 3, the movable (rotating) electrode portion is urged by the urging means, and the object side electrode portion is moved to the pallet side electrode portion by being displaced against this urging force. It will be in the state pressed against. When the object to be mounted is mounted on the first pallet, it is assumed that the load generated at the contact portion between the electrode portions increases due to the contact between the electrode portions. If the electrode portion is deformed / damaged by such a load, the electrical connection function can be lowered. In this respect, if the movable electrode part is employed as shown in the means 2 and further the urging means shown in this means is adopted, the load generated by the contact between the electrode parts can be reduced, A decrease in electrical connection function can be suppressed.

  Further, the rotation angle of the movable electrode portion changes according to the mounting position of the mounted object. For this reason, the operator can grasp whether or not the contact is maintained by visually confirming the rotation position (rotation angle) of the movable electrode part, and further, the rotation angle is an index. As a result, the mounting position of the mounted object can be adjusted.

Means 4. In a situation where the first pallet is immersed in the electrodeposition coating liquid, a vibration in a specific vibration direction is applied to the first pallet.
The pallet side electrode part and the mounted object side electrode part are in contact with each other in a direction orthogonal to the vibration direction when the mounted object is mounted on the pallet. The electrodeposition coating apparatus according to any one of 1 to 3.

  When performing electrodeposition coating, for example, a treatment is often performed such as removing air bubbles adhering to the surface of the object to be coated by applying vibration to the mounted object. Therefore, as shown in this means, if both electrodes are in contact with each other in a direction orthogonal to the vibration direction, even if a positional shift in the vibration direction due to the vibration occurs in the mounted object, Decreasing the pressing force (decreasing the maintenance function) can be suppressed. Therefore, the connection function can be exhibited stably.

  In addition, when the mounted object (coating target) is a heavy object and the vertical position is easily determined by its own weight, the vibration direction may be set to the horizontal direction, and the contact direction of both electrode portions may be set to the vertical direction. Thereby, stabilization of the said connection function can be implement | achieved suitably.

Means 5. The first pallet is:
A mounting portion (frame member 41a of the base frame portion 41) on which the mounted object is mounted;
Having an upright portion (column portion 43) provided to stand upward from the placement portion,
The upright portion is provided at an inlet side end portion in the mounting direction of the mounted object in the mounting portion,
In the standing part, the pallet side electrode part is provided in a direction orthogonal to the mounting direction and extending in the horizontal direction,
The mounted object side electrode portion is configured to come into contact with the pallet side electrode portion from above when the mounted object is mounted on the mounting portion through the inlet side end portion. The apparatus for electrodeposition coating according to any one of means 1 to means 4 characterized by the above.

  For example, when it is assumed that the electrode parts are in contact with each other by moving the object to be mounted in the horizontal direction, the above-described electrical connection can be realized, but the object to be mounted (particularly the object to be coated) is mounted. Adjust the vertical position so that the pallet side electrode part and the mounted object side electrode part make good contact with each other, including when the mounted object is lowered, while adjusting the vertical position so that the mounting part and the pallet side electrode part do not collide with each other. Need to match. This becomes a factor that makes it difficult to perform the work of mounting the load.

  On the other hand, in this means, when inserting the mounted object, it is sufficient to adjust the vertical position so that the edge of the entrance does not collide with the mounted object. There is no need to As a result, it is not necessary to check whether or not the arrangement is good and away from a transportation means such as a forklift. Therefore, it is possible to contribute to the efficiency of the preparation work shown in the means 1 or the like.

Means 6. The upright portions are provided on both sides of the mounting entrance at the side end portion,
The pallet side electrode part is constituted by an elongated member extending in the same direction as the juxtaposed direction of the both standing parts, and is fixed to the both standing parts,
Each contact part where the pallet side electrode part and the load object side electrode part contact each other is slidable in the longitudinal direction of the pallet side electrode part with respect to the pallet side electrode part. The apparatus for electrodeposition coating according to means 5, characterized in that

  According to the means 6, the mounted object side electrode part is slidable in the longitudinal direction with respect to the pallet side electrode part. For this reason, even if it is a case where the vibration to a horizontal direction is added as a vibration of the 1st pallet in the means 4 and the bubble removal operation is performed, it becomes easy to maintain a contact state. Therefore, the electrodeposition function can be stably exhibited while improving workability.

  Moreover, according to this means, the long pallet side electrode part is being fixed to the standing part provided in the both sides which pinched | interposed the mounting inlet. In this way, by improving the fixing strength of the pallet side electrode part, even if the contact position is variously changed by the sliding, the contact state is prevented from becoming unstable due to it. ing.

Mean 7 As the object to be mounted, the coating object and a second pallet (child pallet 12) mounted on the first pallet in a state where a plurality of the coating objects are mounted,
The electrodeposition coating apparatus according to any one of means 1 to means 6, wherein the mounted object side electrode portion is provided integrally with the second pallet.

  As shown in the means 7, if the second pallet is employed, a plurality of painting objects can be transported together, so that the painting objects can be efficiently transferred between processes. In other words, the first pallet can be used exclusively for the painting process, and the second pallet can be shared between the processes, thereby contributing to the efficiency of manufacturing. However, when a plurality of pallets are used in combination as described above, the work efficiency may be lowered because work for electrically connecting the pallets is required after the pallets are combined. Therefore, if the technical idea shown in the means 1 or the like is applied to the configuration shown in this means, it is possible to suppress a decrease in work efficiency and to suitably exhibit the effect of improving the manufacturing efficiency.

  Moreover, in the structure which has a coating object and a 2nd pallet as a to-be-mounted object, the following effects can be anticipated by making the mounting object of a to-be-mounted object side electrode part into a 2nd pallet. That is, even if the presence of the electrode itself is essential, it is not necessary to attach a configuration for automatic connection having a pressing mechanism or the like to the object to be coated, so that the contact area between the electrode and the object to be painted can be reduced. Thereby, when a coating object is submerged in an electrodeposition coating liquid, it can suppress that the part which does not touch an electrodeposition coating liquid in the surface of a coating object (part to which coating does not adhere) becomes large.

  In order to embody the technical idea shown in this means, for example, the following configuration may be adopted. That is, “the second pallet has the bottom (bottom surface 22) of the second pallet placed on the top surface (mounting surface 42) of the mounting portion (base frame portion 41) of the first pallet, The mounted object is configured to be mounted on the first pallet, and the mounted object side electrode part is configured to contact the pallet side electrode part from above, and the bottom part and the mounted object The height difference with the object side electrode part is set to be smaller than the height difference between the upper surface of the mounting part and the pallet side electrode part, and the pallet side electrode part and the mounted object side electrode part are In the process in which the mounted object moves to the mounting completion position, the contact state is established, and the pressing mechanism is in a state where the pallet side electrode part and the mounted object side electrode part are in the contact state. The boarded vehicle toward the mounting completion position It may employ features that "configuration that is intended for generating the pressing force based on the movement of goods.

Means 8. A coating object restraining portion (spring chain 25) for restraining the painting object in the second pallet;
The electrodeposition coating apparatus according to means 7, wherein the coating object restricting portion has conductivity and is electrically connected to the mounting object side electrode portion.

  According to the means 8, by restraining the painting object, it is possible to suppress the collapse of the load when the painting object is transported together with the pallet or during painting.

  Moreover, the coating object restraining part is electrically connected to the mounted object side electrode part. For this reason, the function to energize the object to be mounted and the object to be mounted-side electrode part can be exerted on the coating target restraint part, and it is difficult to cause inconvenience that electrodeposition coating is not performed well due to poor contact or the like. can do.

(A) The perspective view which shows the outline | summary of the apparatus for electrodeposition coating, and sectional drawing of the apparatus for electrodeposition coating. The perspective view which shows a child pallet. The perspective view which shows a parent pallet. The perspective view which shows a connection mechanism. Schematic for demonstrating the preparatory work for electrodeposition coating.

  Hereinafter, an embodiment of an electrodeposition coating unit will be described with reference to FIGS. In this embodiment, the electrodeposition coating unit is embodied as a carrier for transportation composed of a combination of a plurality of pallets, and can be applied to a coating object such as a building structure consisting of beams and pillars of a building or a base frame of an outer wall. It is assumed that a cationic electrodeposition coating is applied. 1A is a perspective view showing an outline of an electrodeposition coating unit, FIG. 1B is a cross-sectional view showing an electrodeposition coating unit, FIG. 2 is a perspective view showing a child pallet 12, and FIG. 3 is a parent pallet. FIG. In FIG. 1A, the energization path is simplified by a one-dot chain line, and FIG. 2 shows a state in which the coating object 15 is placed on the child pallet 12.

  First, an outline of the electrodeposition coating unit 10 will be described with reference to FIG. The electrodeposition coating unit 10 is formed such that the parent pallet 11 and the coating object 15 that are transported to the electrodeposition tank T by a conveyor provided in the coating facility can be placed as the plurality of pallets, and the coating object 15 is placed thereon. And a child pallet 12 to be combined with the parent pallet 11 in a state of being made.

  As shown in FIG. 2, the child pallet 12 has a long plate-like placement portion 21 on which the coating object 15 is placed. By placing the coating object 15 on the mounting portion 21 (stacking vertically), the plurality of coating objects 15 can be collectively immersed in the electrodeposition tank. The child pallet 12 is made of steel and has a sufficient strength to support the plurality of painting objects 15.

  Here, with reference to FIG.1 (b), the structure concerning arrangement | positioning of the coating object 15 is demonstrated. A plurality of spacer members 16 having conductivity are disposed between the placing portion 21 and the coating object 15 positioned immediately above and between the coating objects 15.

  The spacer member 16 is a long steel material having a substantially square cross section, and is arranged so that the bent portion is convex upward. Thereby, the long side part (edge part) of the spacer member 16 contacts the coating object 15 and the mounting part 21 located on the lower side of the spacer member 16, and the bending part is formed on the coating object 15 located on the upper side. In contact. In this way, by suppressing the contact range between the spacer member 16 and the coating object 15 to be small, it is possible to avoid an increase in a portion (non-coating region) where the electrodeposition coating liquid C and the coating object 15 as the coating object are not in contact with each other. ing.

  A spring chain 25 is attached to the mounting portion 21, and the coating object 15 is collectively restrained by the spring chain 25. In a state where the electrodeposition coating unit 10 is immersed in the electrodeposition coating liquid C in the electrodeposition tank T, the lifting of the coating object 15 from the mounting portion 21 is restricted by the spring chain 25.

  A fork insertion hole 23 into which the fork portion of the forklift can be inserted is formed on the end surface of the mounting portion 21 (specifically, the end surface on the short side portion side). By the forklift, the painting object 15 is lifted together with the child pallet 12 and placed at a predetermined position on the parent pallet 11.

  As shown in FIG. 3, the parent pallet 11 has a base frame portion 41 formed in a substantially rectangular shape by combining long and short frame members 41a and 41b having a long shape. The interval dimension of the short frame members 41a facing each other in the base frame part 41 is set smaller than the width dimension of the mounting part 21 in the same direction as the direction in which the insertion hole 23 extends, and is arranged at a predetermined position. The child pallet 12 is brought into contact with both the short frame members 41a of the base frame portion 41 and is supported from the lower side by the respective short frame members 41a. That is, the upper surface of the short frame member 41 a functions as a support surface that supports the child pallet 12.

  The base frame portion 41 of the parent pallet 11 is also formed with a recess into which the fork portion F of the forklift can be inserted (see FIG. 3), and the entire electrodeposition coating unit 10 can be carried by the forklift. ing.

  At the four corners of the base frame 41, that is, at the portions where the long and short frame members 41a and 41b are connected, the pillars 43 that stand upward from the base frame 41 are fixed. Note that the space surrounded by the base frame portion 41 and the column portion 43 is an accommodation space for accommodating the painting object 15.

  At the upper end portion of the column portion 43, a hanger portion 44 is provided as a gripping object by the conveyor holder H (see FIG. 1B). The hanger portion 44 is made of a steel material having conductivity, and is integrated with the column portion 43. By lifting the hanger 44 while being held by the holder H, the entire electrodeposition coating unit 10 is lifted.

  As shown in FIG. 1B, the electrodeposition coating unit 10 is carried to the electrodeposition tank T in a state where the hanger portion 44 is gripped by the holder H, and the electrodeposition coating liquid C is maintained while maintaining the gripped state. It will be immersed in. Even when the electrodeposition coating unit 10 is immersed, the gripping state by the holder H is maintained, and after the immersion, for example, a preset coating period has elapsed, the electrodeposition coating unit 10 is placed in the electrodeposition tank T. It will be pulled up from (electrodeposition coating liquid C).

  In the present embodiment, when the parent pallet 11 and the child pallet 12 are used in combination, one of the features is that a connection mechanism 13 for electrically connecting both the pallets 11 and 12 is provided. Therefore, the connection mechanism 13 will be described below with reference to FIGS. 1 and 4. FIG. 4 is a perspective view showing the connection mechanism 13.

  As shown in FIG. 1A, the child pallet 12 is provided with a stand 24 that rises upward from the placement portion 21. The stand 24 is fixed in a state of being inserted into an insertion portion (not shown) provided on the end surface of the placement portion 21. The height dimension of the stand 24 is set to be substantially the same as the height dimension of the column portion 43 of the parent pallet 11, and the child side connection portion 31 is attached to the upper end portion of the stand 24. Thereby, the child side connection part 31 becomes a structure located in the same height as the hanger part 44 of the parent pallet 11 in the state which both pallets 11 and 12 combined.

  More specifically, the stand 24 is arranged on one of the short sides of the child pallet 12 on the front side in the insertion direction into the parent pallet 11 (accommodating space). The child pallet 12 is configured to protrude from the accommodation space of the parent pallet 11 when the child pallet 12 is combined with the parent pallet 11. Is also located outside the containment space. In FIG. 1A, the insertion direction of the child pallet 12 with respect to the parent pallet 11 is from the lower left side to the upper right side of FIG. 1A. In FIG. The insertion direction of 12 is from the left side to the right side.

  The child-side connection portion 31 has a flat plate-like fixed base portion 32 provided at the upper end portion of the stand 24. The fixed base portion 32 is fixed so that its plate surface faces upward, and a movable base portion 33 that forms a pair with the fixed base portion 32 is provided above the fixed base portion 32. These base portions 32 and 33 are formed of a conductive material (iron material).

  The movable base portion 33 has a flat plate shape like the fixed base portion 32 and is disposed so as to overlap the fixed base portion 32 from above. A series of through holes penetrating up and down is formed in a portion on the near side in the insertion direction in both base portions 32 and 33, and a cylindrical pin member 34 is inserted into the through hole. . A predetermined gap is secured between the head portion 34a of the pin member 34 and the movable base portion 33, and the movement of the movable base portion 33 in the axial direction (vertical direction) of the pin member 34 is allowed. Note that the position where the movable base 33 is in contact with the fixed base 32 is the initial position.

  A plurality of through holes and pin members 34 are provided side by side in a direction orthogonal to the insertion direction, and the inner diameter dimension of the through holes is set larger than the outer diameter dimension of the pin member 34. As a result, the movable base 33 is allowed to rotate with the front end in the insertion direction as the base end.

  Between the head portion 34a and the movable base portion 33, a spring member 35 is disposed as a biasing unit that biases the movable base portion 33 toward the initial position. After the movable base portion 33 moves from the initial position, the movable base portion 33 returns to the initial position by the biasing force of the spring member 35. The base portions 32 and 33, the pin member 34, and the spring member 35 described above in detail press the rod-like body 36 as the “mounting object side electrode portion” against the parent side connection portion 51 as the “pallet side electrode portion”. In addition, a “pressing mechanism” that maintains the pressed state is configured.

  A plurality of rod-like bodies 36 extending to the side opposite to the pin member 34 side (the front side in the insertion direction) are attached to the rotating front end portion of the movable base portion 33. In contrast, the parent pallet 11 is provided with a long parent-side connecting portion 51 that extends in the horizontal direction so as to connect the hanger portions 44 to each other.

  As shown in FIG. 1B, the child-side connecting portion 31 and the parent-side connecting portion 51 have a distance dimension L1 from the placement surface 42 of the base frame portion 41 to the parent-side connecting portion 51, as shown in FIG. Is set to be smaller than the distance L2 between the bottom surface 22 of the mounting portion 21 and the bottom surface 22 of the mounting portion 21, and in a state where both pallets 11 and 12 are combined, the rod-shaped body 36 is connected to the parent side connection portion 51. On the other hand, it is configured to abut from above.

  The rod-like body 36 and the parent-side connection portion 51 are formed of a conductive material (iron material) similarly to the base portions 32 and 33, and the rod-like body 36 comes into contact with the parent-side connection portion 51. The parent pallet 11 and the child pallet 12 are configured to be electrically connected.

  The movable base portion 33 is provided with a conductive wire 37 for electrically connecting the movable base portion 33 and the painting target 15 as a painting target. More specifically, one end portion of the conductive wire 37 is fixed to the movable base portion 33, and a bolt 38 is provided at the other end portion as an attachment portion to the coating object 15. By screwing the bolts 38 to the painting object 15, the painting object 15 and the child side connection portion 31 (child pallet 12) are electrically connected.

  Note that the attachment portion is not limited to the bolt 38, and it is sufficient that the conductive wire 37 can be attached to and detached from the object 15 to be coated. For example, an arbitrary configuration such as a hook or a clamp may be adopted.

  Here, with reference to FIG.1 (b), the electrical connection aspect of the unit 10 for electrodeposition coating and the structure relevant to it is demonstrated.

  As already described, in the present embodiment, the electrodeposition coating unit 10 is transported by a conveyor. The conveyor holder H is grounded, and the coating is located at the top through the holder H → hanger 44 → parent connection 51 → sub connection 31 (rod 36 → movable base 33 → conductive wire 37). Object 15 is grounded. The coating objects 15 overlap with each other with the spacer member 16 interposed therebetween, and all the coating objects 15 are grounded through the spacer member 16. Thereby, the coating object 15 is a cathode (-). The electrode plate P installed in the diaphragm chamber in the electrodeposition tank T is used as an anode (+), and a direct current is passed between them to deposit a coating film on the surface of the coating object 15.

  Next, with reference to FIG. 5, the preparation work before the electrodeposition coating unit 10 is carried to the electrodeposition tank T by the conveyor will be described. FIG. 5 is a schematic diagram showing the flow of work, and before moving to the electrodeposition coating process, preparation work in the order of FIG. 5 (a) → FIG. 5 (b) → FIG. 5 (c) → FIG. 5 (d). Is done. In FIG. 5, for convenience of explanation, the electrodeposition coating unit 10 is displayed in a state compressed to the left and right.

  The painting object 15 is transported to the painting process after various processes such as welding for assembling the parts of the painting object 15. At this time, the child pallet 12 is used as a transportation means during movement between the processes.

  After the work is completed in the previous process of the painting process (for example, welding process), as shown in FIG. 5A, before the painting object 15 is transported to the painting process, the painting object 15 and the movable base portion are connected by the conductive wire 37. 33 is electrically connected. Specifically, the coating object 15 is vertically stacked using the spacer member 16, and a conductive wire 37 (specifically, a bolt 38) extending from the movable base portion 33 of the child side connection portion 31 is applied to the coating object 15 positioned at the uppermost position. Install.

  Thereafter, the child pallet 12 is lifted by the forklift FL while the painting object 15 is placed, and is moved from the production line of the previous process to the production line of the painting process. Since the parent pallet 11 is dedicated to the painting process, it is arranged at a standby place adjacent to the painting process, and the child pallet 12 is arranged on the parent pallet 11.

  Specifically, the child pallet 12 is lifted, and the child pallet 12 is moved to a predetermined mounting position while maintaining its height position as shown in FIGS. 5B to 5C. At this time, the child pallet 12 is moved by moving the child pallet 12 so that the child pallet 12 passes through the insertion port formed by the base frame part 41, the column part 43, and the parent side connection part 51 of the parent pallet 11. However, in a state where the predetermined mounting position has been reached, the rod-shaped body 36 of the child side connection portion 31 is located above the parent side connection portion 51.

  Here, as shown in FIG. 5 (c) → FIG. 5 (d), when the fork portion F of the forklift FL is lowered, the placement portion 21 (specifically, the bottom surface 22) of the child pallet 12 is placed on the parent pallet 11. Before contacting the base frame portion 41 (specifically, the mounting surface 42), the rod-shaped body 36 contacts the parent side connection portion 51. When the child pallet 12 further descends following the fork portion F, the movable base portion 33 rotates with the end portion on the pin member 34 side as the base end portion. As a result, the spring member 35 is compressed, and the rod-shaped body 36 is pressed against the parent-side connecting portion 51 from above. Such a state is maintained by the urging force of the spring member 35 at least in a situation where the child pallet 12 is disposed at the mounting completion position.

  By connecting the parent side connection part 51 and the child side connection part 31, the energization path shown in FIG. 1B is secured, and the hanger part 44 of the parent pallet 11 is held by the holder H of the conveyor. In the meantime, the painting object 15 is maintained in a grounded state.

  In the coating process, after the electrodeposition coating unit 10 is immersed in the electrodeposition coating liquid C, it is applied to the electrodeposition coating unit 10 until the coating starts, that is, before the current is passed through the electrode plate P. Vibration in the horizontal direction is added. Specifically, a vibration device is connected to the holder H of the conveyor, and when this vibration device is operated, vibration in the horizontal direction is applied to the holder H, and the vibration is expressed by the holder H → It is transmitted to the painting object 15 through the parent pallet (hanger portion 44 → column portion 43 → base frame portion 41) → child pallet (mounting portion 21). In this way, by applying vibration to the coating object 15, bubbles adhering to the surface of the painting object 15 are separated from the painting object 15, and there are places where the electrodeposition coating liquid C does not contact the surface of the painting object 15. Is suppressed.

  According to the embodiment described above in detail, the following excellent effects can be expected.

  By mounting the child pallet 12 on the parent pallet 11, the electrical connection between the pallets 11 and 12 is completed. In other words, since the above-described preparation work is completed by placing the painting object 15 at the mounting completion position, the operator gets off the forklift every time the painting object 15 is carried to the painting process, and the child pallet 12 (in detail) There is no need to separately perform a connection work for electrically connecting the painting object 15) and the parent pallet 11. Thereby, it becomes possible to improve the efficiency of the preparatory work at the time of performing electrodeposition coating suitably.

  In the parent pallet 11, the parent side connection portion 51 is provided at the inlet side end portion in the insertion direction (mounting direction) of the child pallet 12, and the child side connection portion 31 is on the forklift (operator) side in the child pallet 12. Placed in position. For this reason, when the child pallet 12 (mounting object) is mounted on the parent pallet 11 using a forklift or the like, the forklift operator sets the connection state of the electrode portion at the front side position of the electrodeposition coating unit 10. It can be confirmed visually. This makes it easier for the worker to grasp the positional relationship between the child side connection part 31 and the parent side connection part 51.

  If it can be confirmed that the movable base portion 33 is displaced from the initial position, it is determined whether or not the urging force is applied without directly touching the contact portion between the rod-like body 36 and the parent-side connection portion 51. I can grasp it. Therefore, it is not necessary to perform a separate operation such as checking whether the urging force is applied after getting off the forklift after the completion of the mounting, thereby contributing to simplification of the preparation work.

  In addition, it is overlooked that the urging force is not functioning (just in contact), and the electrodeposition coating will not be performed well, for example, the connection state is released during painting. Can be suppressed.

  Further, the movable base portion 33 and the rod-like body 36 to which the connection function is given are attached to the fixed base portion 32 so as to be rotatable. According to such a configuration, it is possible to suppress a large load from being generated on the movable base portion 33 and the rod-shaped body 36 itself. As a result, it is difficult to cause a problem that the portion provided with the connection function is deformed, and the contact function, that is, the electrical connection function can be prevented from being lowered.

  When carrying the child pallet 12 to the painting process using a forklift, the child pallet 12 is moved in a lifted state. Then, the child pallet 12 is inserted into the parent pallet 11 and placed on the base frame portion 41, whereby the loading of the child pallet 12 is completed. Therefore, as shown in the above-described embodiment, if the child-side connection portion 31 (specifically, the rod-like body 36) is configured to abut on the parent-side connection portion 51 from above, the child pallet 12 is lowered and the coating object 15 is removed. The parent pallet 11 can be electrically connected.

  In the case of performing electrodeposition coating, for example, a treatment such as removing bubbles adhering to the surface of the coating object 15 may be performed by applying horizontal vibration to the electrodeposition coating unit 10. Here, in consideration of the fact that the coating object 15 is a heavy object and the vertical position is likely to be determined by its own weight, if the child-side connection portion 31 is in contact with the parent-side connection portion 51 from above, the horizontal direction can be increased. It can be suppressed that the urging force is reduced due to misalignment or the like (decrease in the maintenance function). Therefore, the connection function can be exhibited stably.

  Since the parent side connection portion 51 extends in a direction intersecting with the insertion direction of the child pallet 12 into the parent pallet 11, even if the insertion direction or insertion position of the child pallet 12 is shifted, both the connection portions 31, 51 connection functions are secured. As a result, it is not necessary to perform an insertion operation while precisely aligning the connection portions 31 and 51, which can contribute to improvement in workability.

  In the present embodiment, the child pallet 12 is employed as described above. Thereby, since the several coating object 15 can be conveyed collectively, the delivery of the coating object 15 between processes can be performed efficiently. That is, the parent pallet 11 can be used exclusively for the painting process, and the child pallet 12 can be shared between the processes, thereby contributing to the efficiency of manufacturing.

  However, in the case where a plurality of pallets 11 and 12 are used in combination as described above, work efficiency is required by performing an electrical connection between the pallets after the pallets 11 and 12 are combined. Can be reduced. In this respect, in the present embodiment, by adopting the connection mechanism 13, it is possible to suppress a decrease in work efficiency and to appropriately exhibit the effect of improving the manufacturing efficiency.

  Further, since the stand 24 is attached to the child pallet 12, the portion where the coating object 15 and the electrodeposition coating liquid do not come into contact with each other can be reduced as compared with the structure in which the stand 24 is directly attached to the painting object 15. It is possible to apply electrodeposition coating to a wider range.

  For example, when a configuration is assumed in which both connection portions are connected (contacted) by moving the child pallet 12 in the horizontal direction, the above-described electrical connection can be realized, but the coating object 15 and the base While adjusting the vertical position so that the frame 41 and the parent side connection part 51 do not collide with each other, the lower side position is adjusted so that the child side connection part and the parent side connection part abut well including when the child pallet 12 is lowered. Need to match. This becomes a factor that makes it difficult to mount the child pallet 12.

  In this regard, in the present embodiment, when the child pallet 12 is inserted into the parent pallet 11, the child pallet 12 and the coating object 15, the base frame portion 41, and the parent-side connection portion 51 are prevented from colliding with each other. Is sufficient, and there is no need to worry about the vertical position of the connecting portions 31, 51. As a result, it is not necessary to check away from the forklift to check whether the arrangement is successful or not and the complication of work is suppressed. Therefore, the efficiency of the above-described preparation work can be promoted.

  In addition, it is not limited to the description content of embodiment mentioned above, For example, you may implement as follows. Incidentally, the configuration of another embodiment described below may be applied individually to the configuration in the above embodiment, or may be applied in combination with each other.

  (1) In the above embodiment, the parent pallet 11 as the “first pallet” and the child pallet 12 as the “second pallet” are used together, but the child pallet 12 is not an essential configuration and is omitted. It is also possible to do. When the child pallet 12 is omitted, the painting target 15 may be placed directly on the base frame portion 41 of the parent pallet 11.

  Further, in this case, the child-side connection portion 31 constituting the “mounting object side electrode portion” and the “pressing mechanism” is detachably provided to the painting object 15, and before being carried to the painting process, the painting object 15 It is preferable to attach the child-side connection part 31 to the head. Thus, in the structure which attaches the child side connection part 31 to the coating object 15, by giving an electrical connection function to the contact location of a stand and the painting object 15, it is set as "the to-be-mounted object side electrode part." The function of can be demonstrated. Thereby, the configuration corresponding to the conductive wire 37 described in the above embodiment can be omitted, and the configuration can be simplified.

  (2) In the above embodiment, by lowering the child pallet 12 onto the base frame portion 41 of the parent pallet 11 (to the mounting completion position), both pallets 11 and 12 (specifically, both connecting portions 31 and 51) are moved. Although it is configured to be electrically connected, the present invention is not limited to this. By moving the child pallet 12 in the horizontal direction, the parent side connecting portion as the “pallet side electrode portion” and the “mounting object” It is also possible to adopt a configuration in which the child side connection portion constituting the “side electrode portion” is connected. For example, the movable base portion 33 is disposed so that the position where the movable base portion 33 rises upward from the fixed base portion 32 is the initial position, and the end of the movable base portion 33 opposite to the side on which the rod-shaped body 36 is fixed The fixed base part 32 is connected by a hinge member. And it is good for the movable base part 33 to make it the structure which rotates by making the edge part by the side of a hinge member into a base end part by the parent side connection part 51 contact | abutting with respect to the plate surface or the rod-shaped body 36 of the movable base part 33. .

  However, in such a contact state, the contact direction and the insertion direction are the same direction. For this reason, when the displacement amount of the child pallet 12 in the same direction becomes larger than the deformation amount (hanging amount) of the spring, the electrical connection between the pallets 11 and 12 is released. On the other hand, in the above embodiment, even when the displacement of the child pallet 12 occurs, the contact state can be maintained from the positional relationship between the connecting portions 31 and 51. Thereby, it can avoid suitably that the function which maintains in a contact state by the displacement of the child pallet 12 becomes invalid. Therefore, desirably, as shown in the above-described embodiment, in the configuration in which the child pallet 12 is mounted on the parent pallet 11 from above, the vertical position is relatively easily stabilized by the weight of the child pallet 12. Paying attention, it is good to make it the structure which both the connection parts 31 and 51 contact | abut up and down.

  (3) In the above embodiment, the child side connecting portion 31 (specifically, the rod-like body 36) on the child pallet 12 side is movable (variable), and the parent side connecting portion 51 on the parent pallet 11 side is fixed. However, the present invention is not limited to this, and the relationship between the two can be reversed. Furthermore, it is also possible to adopt a configuration in which both the child-side and parent-side electrode portions can be displaced so that each exerts a pressing force.

  (4) In the above embodiment, the electrical connection between the pallets 11 and 12 is maintained by the urging force of the spring member 35. However, the child side connection part 31 (specifically, the rod-like body 36) and the parent side connection part are used. If it can be set as the state pressed by 51, it is sufficient and does not necessarily require urging | biasing force. For example, it is possible to adopt a configuration in which the electrical connection between the pallets 11 and 12 is maintained by the weight of the movable base portion 33 and the rod-shaped body 36.

  (5) In the above embodiment, the movable base portion 33 of the child side connection portion 31 is a rotary type. However, as long as it is biased so as to maintain at least the state of being pressed against the parent side connection portion 51. The displacement mode of the child-side connecting portion 31 is arbitrary, and for example, a sliding type is also possible.

  (6) In the above embodiment, the spring member 35 is used as the “biasing means” to generate the biasing force. However, the present invention is not limited to this. For example, if the movable base portion 33 and the rod-shaped body 36 are configured to generate an urging force by elastic deformation, the function as the “biasing means” can be imparted to the movable base portion 33 and the rod-shaped body 36. Thereby, since the spring member 35 can be omitted, the configuration of the connection mechanism 13 can be simplified.

  In addition, as shown in the said modification (2), when it is set as the structure which the child side connection part 31 contact | abuts to the parent side connection part 51 from the near side in the insertion direction of the child pallet 12, it has a conductive function in the stand 24. At the same time, the upper end portion of the stand 24 is provided with a function as a “mounting object side electrode portion”, and the stand 24 itself is bent (elastically deformed) when contacting the parent side connection portion 51. ), The configuration can be simplified.

  (7) It is possible to provide the spring chain 25 shown in the above embodiment with a function (ground function) similar to that of the conductive wire 37. In this case, a part of the spring chain 25 may be electrically connected to any one of the movable base portion 33, the fixed base portion 32, and the rod-shaped body 36. The surface portion of the spring chain 25 (portion having conductivity) is exposed, and the exposed portion comes into contact with the object to be coated 15 so that the ground function is exhibited. When making such a change, the conductive wire 37 may be omitted, or the ground function of the conductive wire 37 and the ground function of the spring chain 25 may be used in combination.

  (8) In the above-described embodiment, the parent-side connection portion 51 as the “pallet-side electrode portion” is elongated, but the present invention is not limited to this. Any configuration that abuts against the child-side connection portion 31 constituting the “mounting object-side electrode portion” is sufficient, and its detailed shape and the like are arbitrary.

  However, with respect to the parent-side connection portion 51, the slide-side connection portion 31 can be allowed to slide in the horizontal direction while maintaining a contact state with the child-side connection portion 31 (specifically, the rod-like body 36). It is preferable that the rod-shaped body 36 has a certain size so that the rod-shaped body 36 can slide.

  (9) In the above embodiment, the urging force is generated by the deformation of the spring member 35 in accordance with the pushing operation of the child pallet 12. However, this may be changed as follows.

  That is, the connection mechanism 13 as a “pressing mechanism” can switch between a biasing state in which, for example, the movable base portion 33 is biased and a standby state in which the biasing is not performed, and the pusher in a biasing state and a standby state It is also possible to adopt a configuration in which the pusher is switched to the energized state when the child pallet 12 is mounted on the parent pallet 11.

  (10) In the above-described embodiment, the attachment target of the conductive wire 37 is the uppermost coating target 15, but is not limited thereto. For example, it is possible to connect both the uppermost and lowermost ones of the coating objects 15 in which the conductive wires 37 are vertically stacked. About the spacer member 16 mentioned above, a coating film may become thick by repeated use, and an energization function may fall. Therefore, if the uppermost painting object 15 and the lowermost painting object 15 are grounded as described above, even if the energization between the painting objects 15 is interrupted due to a failure of the spacer member 16. Inconveniences such as poor electrodeposition coating can be prevented.

  (11) In the above embodiment, when performing cationic electrodeposition coating using the holder H, the connection mechanism 13, and the coating object 15 as the cathode and the electrode plate P immersed in the electrodeposition tank T as the anode, the electrodeposition coating unit However, for example, when the anion electrodeposition coating is performed with the anode and the cathode reversed, the electrodeposition coating unit 10 may be applied.

  (12) In the above embodiment, the case where the child side connection portion 31 having the “pressing mechanism” is applied to the electrodeposition coating apparatus for coating the building materials of the building is illustrated. It is also possible to apply a configuration corresponding to the child side connection portion 31 to the target electrodeposition coating apparatus.

  DESCRIPTION OF SYMBOLS 10 ... Electrodeposition coating unit which comprises the apparatus for electrodeposition coating, 11 ... Parent pallet as 1st pallet, 12 ... Sub pallet as 2nd pallet, 13 ... Connection mechanism, 15 ... Coating object, 21 ... Mounting , 22 ... bottom face, 24 ... stand that constitutes the electrode support part, 25 ... spring chain as a coating object restraining part, 31 ... child side connection part, 32 ... fixed base part that constitutes the pressing mechanism, 33 ... pressing mechanism The movable base portion constituting the pin 34, the pin member constituting the pressing mechanism 35, the spring member as the pressing force generating means or the urging means 36, the rod-shaped body as the loaded object side electrode portion 37, the conductive wire 41 ... Frame part, 41a ... Frame member constituting mounting part, 42 ... Mounting surface, 43 ... Column part as standing part, 44 ... Hanger part, 51 ... Parent side connection part as pallet side electrode part, C ... Electrodeposition coating liquid, F ... Fork part, L ... forklift as transportation, H ... holder, S ... water, T ... electrodeposition tank, P ... electrode plate.

Claims (8)

A first pallet immersed in an electrodeposition coating solution in an electrodeposition tank in a state where an object to be coated including a coating target is mounted;
A pallet-side electrode portion provided integrally with the first pallet and serving as an electrode of either a cathode or an anode;
Provided integrally with the mounted object, electrically connected to the mounted object, and electrically connected to the pallet side electrode part by contacting the pallet side electrode part A load-side electrode part,
The mounted object side electrode part is provided at a position in contact with the pallet side electrode part in a state where the mounted object is mounted on the first pallet;
The load is mounted on the first pallet so that the pallet side electrode portion is pressed against the load object side electrode portion, and the load is mounted on the first pallet. An electrodeposition coating apparatus comprising a pressing mechanism configured to maintain the pressed state below. The pressing mechanism is
At least one of the pallet side electrode part and the mounted object side electrode part is used as a movable electrode part, and the electrode part is supported, and the pallet side is mounted as the mounted object is mounted on the first pallet. When the object-side electrode part comes into contact with the electrode part, an electrode support part capable of displacing the movable electrode part from the initial state before the contact;
And a pressing force generating means for generating a pressing force so that the load-side electrode portion remains in contact with the pallet-side electrode portion when the movable electrode portion is displaced from the initial state. The apparatus for electrodeposition coating according to claim 1, wherein The electrode support portion rotatably supports the movable electrode portion, and enables the displacement from the initial state by rotating the movable electrode portion.
3. The electrodeposition coating apparatus according to claim 2, wherein the pressing force generating means is an urging means that urges the movable electrode portion toward the initial state. In a situation where the first pallet is immersed in the electrodeposition coating liquid, a vibration in a specific vibration direction is applied to the first pallet.
The pallet side electrode part and the mounted object side electrode part are in contact with each other in a direction orthogonal to the vibration direction when the mounted object is mounted on the pallet. The electrodeposition coating apparatus according to any one of claims 1 to 3. The first pallet is:
A placement section on which the object is placed;
An upright portion provided upright from the mounting portion,
The upright portion is provided at an inlet side end portion in the mounting direction of the mounted object in the mounting portion,
In the standing part, the pallet side electrode part is provided in a direction orthogonal to the mounting direction and extending in the horizontal direction,
The mounted object side electrode portion is configured to come into contact with the pallet side electrode portion from above when the mounted object is mounted on the mounting portion through the inlet side end portion. The electrodeposition coating apparatus according to any one of claims 1 to 4, wherein: The upright portions are provided on both sides of the entrance entrance at the entrance end,
The pallet side electrode part is constituted by an elongated member extending in the same direction as the juxtaposed direction of the both standing parts, and is fixed to the both standing parts,
Each contact part where the pallet side electrode part and the load object side electrode part contact each other is slidable in the longitudinal direction of the pallet side electrode part with respect to the pallet side electrode part. The electrodeposition coating apparatus according to claim 5, wherein the electrodeposition coating apparatus is formed to be As the object to be mounted, the coating object and a second pallet mounted on the first pallet in a state where a plurality of the coating objects are mounted,
The electrodeposition coating apparatus according to claim 1, wherein the mounted object side electrode portion is provided integrally with the second pallet. A coating object restraining portion for restraining the painting object in the second pallet;
The electrodeposition coating apparatus according to claim 7, wherein the coating object restricting portion has conductivity and is electrically connected to the mounted object side electrode portion.