JPH10110297A - Plating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plating device by which a work to be plated is dipped in the center of a plating tank irrespective of the work length, and plating is automated. SOLUTION: A couple of hangers 21 and 22 are moved by a driving mechanism 13 on the frame 2 side through a driving force transmitting part 48 on the work conveying mechanism 3 side, and the electrode parts 33 and 34 at the tips of the respective rotating shafts 31 and 32 are attached to both ends of a work 100 and horizontally held. The work conveying mechanism 3 is conveyed to a plating tank 7, and the work 100 is completely dipped in a plating soln. The rotating shaft 31 of the work conveying mechanism 3 is driven in the plating tank 7 by the driving mechanism 13 on the frame 2 side through the driving force transmitting part 48 to rotate the work 100. The current collecting parts 43 and 44 are simultaneously connected to the feeder parts 15 and 16 on the frame 2 side, and a current is applied to the work 100 through the rotating shaft 31 and electrode part 33. The work 100 is completely dipped in the plating soln., rotated and plated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a plating apparatus.

[0002]

2. Description of the Related Art For example, a roll used for gravure printing is formed by applying copper plating to the surface of an iron roll (a cylinder roll or a roll with a shaft), and engraving desired characters or patterns on the copper surface by etching or the like. Then, a plate is prepared, and then chrome plating having excellent wear resistance is applied to perform a surface treatment to protect the engraved characters and pictures. Such rolls are produced in a number corresponding to the number of colors to be printed. Therefore, in multicolor printing, a large number of rolls are required, and accordingly, the surface treatment, that is, the chrome plating treatment, must be performed quickly.

[0003] The plating apparatus chucks both ends of a roll with electrodes provided at the tip of a rotating shaft, respectively, and performs an alkali treatment,
After the surfaces of the rolls are washed by sequentially performing processes such as washing with hot water and a water shower, the rolls are immersed in a plating tank, and the rolls are rotated and energized to perform plating. After the plating is completed, treatments such as a water-washing shower and polishing are performed. Thus, a roll is produced. Therefore, these series of processes are performed efficiently,
It is desirable to make a large number of rolls quickly.

There are rolls of various sizes and sizes according to the size and length of the printed material. When these rolls are chucked with electrodes and immersed in a plating bath, the entire surface to be plated is plated. In making the conditions of
It is desirable to immerse the roll in the center of the plating tank as much as possible.

[0005]

In a conventional gravure printing roll plating apparatus, one of the electrodes on both sides is made movable in the axial direction by an air cylinder, and the other electrode is fixed. In the case of a short roll, it cannot be immersed in the center of the plating tank. Moreover, since the amount of movement of the electrode on the moving side in the axial direction is small, it is necessary to attach an appropriate length of attachment to the electrode each time, especially in the case of a short roll, to compensate for the work efficiency. Moreover, it is difficult to automate the series of processing steps.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and allows a workpiece to be immersed in the center of a plating tank irrespective of the length of the workpiece to be plated, and to automate the plating process. It is an object of the present invention to provide a plating apparatus that can perform the plating.

[0007]

According to the present invention, in order to attain the above object, according to the present invention, a roll-shaped work is sandwiched at both ends and immersed in a plating tank, and the work is energized while rotating the work. In the plating apparatus, both ends are placed on side frames arranged along the transport direction of the work on both the left and right sides of the plating tank, and are horizontally bridged above the plating layer, and suspended. And a pair of hangers suspended from the rail and movable horizontally along the rail, and a pair of hangers disposed on the rail to symmetrically separate and approach the pair of hangers. A pair of conductive rotating shafts disposed at the lower end of each of the hangers and horizontally and on the same straight line, and both ends of which are rotatably supported at each end; Opposite axes A pair of electrode portions that are attached to the respective distal ends and are electrically connected to each other to pinch both ends of the work, and a pair of electrode portions that are connected to one of the base ends of the rotating shaft and transmit a driving force to the rotating shaft. 2, a work transfer mechanism comprising: a driving force transmitting unit; a current collecting unit attached to a base end of the rotating shaft and electrically connected to the work through the electrode unit; A first arrangement in which the pair of hangers is disposed at a predetermined position via the first driving force transmission unit and the work is held between the electrode units;
A second drive mechanism disposed at the plating tank position of the side frame to rotate the rotating shaft via the second driving force transmitting unit; and a plating tank position of the side frame. And a power supply unit electrically connected to the current collecting unit and energized.

The pair of hangers suspended from the rails are moved by the first driving mechanism on the frame side via the first driving force transmission section on the work transfer mechanism side, and the respective rotating shafts supported by the hangers are moved. The electrode part provided at the tip is attached to both ends of the work and held horizontally. Next, the work transfer mechanism is transferred to the position of the plating tank, and the work is completely immersed in the plating solution. The pair of hangers move symmetrically, and the work is immersed in a substantially central position of the plating tank. In the work transfer mechanism, the rotating shaft is rotationally driven at a position of the plating tank by a second driving mechanism on the frame side via a second driving force transmission unit.
Rotate the work. At the same time, the power collection unit of the work transport mechanism is connected to the power supply unit on the frame side, and electricity is supplied to the work via the rotating shaft and the electrode unit. The work is rotated while being completely immersed in the plating solution, and the entire surface is plated under substantially the same conditions. Thereby, the workpiece can be plated well.

According to a second aspect of the present invention, the second driving mechanism includes a driving motor, a driving sprocket mounted on the driving motor, and a guide extending along the moving direction of the hanger. And a chain that is slidable on the guide and meshes with the driving sprocket and rotates along the guide. The second driving force transmitting portion of the rotating shaft is meshable with the chain. Driven sprocket, the driven sprocket,
The rotating shaft is configured to be driven by being engaged with the chain from above at a position where the work is held therebetween.

The holding position of the rotating shaft differs depending on the length of the work, and the hanger moves forward and backward. Then, the rotating shaft moves forward and backward together with the hanger. The driven sprocket of the second driving force transmitting portion of the rotating shaft is driven to rotate by meshing with the chain of the second driving mechanism on the frame side from above. The chain extends along the direction of movement of the hanger,
The rotation shaft is engaged with the chain at a position where the work is held. Thereby, the rotation shaft can take a long stroke. The chain is driven by a driving sprocket fixed to the rotating shaft of the driving motor, and rotates the rotating shaft via the driven sprocket.

[0011]

Embodiments of the present invention will be described below with reference to embodiments. 1 to 4 are schematic configuration diagrams of a plating apparatus according to the present invention. 1 and 2 show the configuration of the frame 2 of the plating apparatus 1, and FIGS. 3 and 4 show the work transfer mechanism 3. In FIG. 1, between the left and right frames 2b and 2c of the frame 2, a work (cylinder roll) mounting portion 5 is arranged at the start end of the line, and the work mounting portion 5 extends from the work mounting portion 5 in the transport direction indicated by the arrow. A plating bath 7 is disposed via an alkaline bath 6, a hot water bath, an activation bath, and a water shower (not shown) as a pretreatment process, and a water shower 8 as a post-treatment process after the plating bath 7, The polishing units 9 are sequentially arranged, and the work take-out unit 10 is arranged at the end position of the line. The plating tank 7 is, for example, a chrome plating tank, and a plurality of the plating tanks are arranged in parallel in the direction in which the workpieces are conveyed.

At each position of the work mounting portion 5 and the work take-out portion 10 of the frame 2, a driving mechanism 11,
12 and 11 ', 12' are installed on each beam connecting the frames 2a and 2b and the frames 2c and 2d horizontally. A drive mechanism 13 is provided on the same side as the drive mechanism 12 at each position of the alkaline bath 6, the hot water bath, the activation bath, each plating bath 7, the water shower 8, and the polishing unit 9 of the frame 2.
In addition, power supply units 15 and 16 are provided on both sides of each plating tank 7 respectively.
Is installed.

The drive mechanism 11 comprises a drive motor 11a, a guide 11b, and a chain 11c, as shown in FIG. 5, and the chain 11c includes a drive sprocket 11d mounted on a rotating shaft of the motor 11a. It is hung on the guide 11b. The chain 11c is the guide 1
Sliding on the upper surface of 1b prevents loosening. Then, a work transfer mechanism 3 described later is provided above the chain 11c.
The sprocket 25 of the driving force transmission unit 23 can be meshed. The drive mechanism 12 includes a drive motor 12a, a guide 12b, and a chain 12c as shown in FIG. 6, similarly to the drive mechanism 11, and the chain 12c is a drive sprocket mounted on a rotation shaft of the motor 12a. 1
2d and the guide 12b. The driving force transmitting unit 48 of the work transfer mechanism 3 is provided above the chain 12c.
Of the sprockets 46 can be meshed. The drive mechanism 12 is installed at a position lower than the drive mechanism 11. The drive mechanisms 11 ′ and 12 ′ are configured in exactly the same manner as the drive mechanisms 11 and 12.

The drive mechanism 13 includes a drive motor 13a and a guide 13b, as shown in FIG.
And a chain 13c.
Is wound around a driving sprocket 13d mounted on the rotating shaft of the motor 13a and a guide 13b. And
The sprocket 46 of the driving force transmission unit 48 of the work transfer mechanism 3 can mesh with the upper side of the chain 13c. As shown by a two-dot chain line in FIG. 7, the sprocket 46 has an arbitrary position from a position near the right end to a position near the left end of the chain 13c, that is, between the position near the sprocket 13d of the driving motor 13a and the position near the end of the guide 13b. And the rotating shaft 31 is rotatable by the driving motor 13a during this time.

That is, the sprocket 46 of the rotating shaft 31 is
When the hanger 21 shown in FIG. 3 moves leftward in the figure to the maximum position (forward), it meshes near the left end of the chain 13c, and when the hanger 21 moves rightward in FIG. The chain 13c meshes near the right end. As a result, FIG.
, The stroke in the left-right direction can be increased. Therefore, by increasing the length of the chain 13c, it is possible to increase the stroke of the hanger 21, that is, the stroke of the rotating shaft 31. Therefore, the rotating shaft 3
By increasing the length of one stroke, the work 100 to be held in cooperation with the rotating shaft 32 (FIG. 4) can be held and rotated over a wide range from short to long. Become.

The drive mechanism 11 of the work mounting section 5 is for chucking both ends of the work (roll) to the work transport mechanism 3 by the electrode portions.
Is for rotating a chucked work (roll). The drive mechanism 11 ′ of the work removal unit 10 is for releasing the work (roll) from the work transfer mechanism 3 by releasing the chucking.

As shown in FIG. 8, the power supply portion 15 is installed on a beam connecting the frames 2c and 2d horizontally at substantially the same height as the drive mechanism 13 and in parallel with the insulating plate 15a.
The electrode plate 15b is provided via the. Electrode plate 15b
Is a long plate that is set slightly longer than the stroke of the rotating shaft 31. The rotating plate 31 rotates between the maximum left end position (forward position) and the maximum right end position (retracted position) described above. The electrode plate 43b (FIGS. 3 and 11) of the current collector 43 attached to the rear end of the shaft 31 can be abutted. The power supply unit 16 is similarly and symmetrically configured with the power supply unit 15, and is arranged to face the same height position. The electrode plate 16b is connected to an electrode plate 44b of the current collector 44 (see FIG. 4,
FIG. 12) can be contacted. Each of these electrode plates 1
5b and 16b are DC power supplies for plating (not shown), respectively.
Is connected to the negative electrode.

The work transfer mechanism 3 horizontally bridges the side frames 2b and 2c of the frame 2 as shown in FIGS.
Hangers 21 and 2 suspended on the left and right sides of the rail 20 so as to be movable in the longitudinal direction.
2, a driving force transmitting portion 23 for transmitting driving force from the driving mechanism 11 on the frame 2 side to move the hangers 21 and 22; Side frames 2b of the frame 2 are provided on both front and rear sides of the left and right sides of the rail 20,
2c, supporting portions 2e, 2
e ′, 2f, 2f ′, and legs 20a, 20a ′, 20b, 20b ′ that are positioned and supported (FIG. 11,
FIG. 12) is provided vertically. Also, hooks 20c, 20c are provided on the upper surface near the left and right ends of the rail 2. These hooks 20c, 20c are for suspending the work transport mechanism 3 by a crane and moving it in the direction of the work mounting section 5 or the direction of the work removing section 10.

The hangers 21 and 22 are substantially gate-shaped when viewed from the front, and linear rails 24 and 24 'are provided along the longitudinal direction on both front and rear surfaces of the rail 20 with respective horizontal portions 21a and 22a.
(FIGS. 9 and 10) are horizontally movably supported.
The driving force transmission unit 23 is disposed on the upper surface of the rail 20 over the entire length as shown in FIGS. Rail 20
A rotation shaft 24, a speed reducer 27, and the like are arranged at one end of the shaft. The rotation of the rotation shaft 24 is transmitted to an input shaft of the speed reducer 27 via a gear system 26. Sprocket 2 is attached to one end of rotating shaft 24.
5 is fixed, and can be engaged with the chains 11c and 11c '(FIGS. 1 and 5) of the drive mechanisms 11 and 11' at the work mounting portion 5 and the work removing portion 10 of the frame 2.

The output shaft of the speed reducer 27 projects on both front and rear sides of the rail 20, and sprockets 28 and 28 'are fixed to both ends. On the other hand, sprockets 29 and 29 '(FIGS. 3 and 11)
8 and 28 ', and are rotatably supported, and chains 30, 30' (FIGS. 3, 4, 9, and 10) are hung between sprockets 28 and 29 and 28 'and 29', respectively. Has been turned. The upper part of the hanger 21 (FIGS. 3 and 9) is located below the chains 30, 30 ', and the hanger 2 is located above the chains 30, 30'.
2 (FIGS. 4 and 10) are attached. These hangers 21, 22 move symmetrically from both sides toward the center or from the center toward both sides as the chains 30, 30 'rotate, and approach or move away from each other. The drive mechanism transmission unit 23 is configured in this manner.

At both ends 21b and 21c of the hangers 21 and 22 (FIGS. 3 and 4) and at the lower ends of the hangers 22b and 22c, both ends of rotating shafts 31 and 32 are rotatably supported.
Electrodes 33,
34 is mounted and fixed. The rotating shafts 31 and 32 are formed of copper rods, and the electrode portions 33 and 34 serve both to energize the work and to clamp the work. The rotating shaft 31 has a coating 36 (FIG. 13) of a corrosion-resistant resin member for protecting it from a plating solution from the vicinity of the distal end to the base end where the electrode portion 33 is mounted.

A bearing 37 (FIG. 13) made of resin is used as a bearing for supporting the front end side of the rotating shaft 31. Since a large number of chemicals that attack metals are used in the plating solution, metal bearings are not only easily corroded, but the lubricating oil of the bearing is a major enemy of the plating solution. Therefore, in order to prevent corrosion due to the plating solution and protect the plating solution, a resin bearing 3 is used.
7 are used. Similarly to the rotating shaft 31, the rotating shaft 32 is coated, and the front end side is supported by a resin bearing.

At the approximate center of the rotating shafts 31 and 32, disk-shaped draining plates 38 and 39 are attached.
The portion from 34 to the portion in front of the draining plates 38 and 39 is completely immersed in the plating solution in the plating tank 7 indicated by a two-dot chain line. Slip rings 41 and 42 for current collection are fixed to the base ends of the rotating shafts 31 and 32 (FIGS. 3 and 4).
The carbon brushes 4 of the current collectors 43 and 44 provided in the 22
3a and 44a are pressed by the spring force of the spring and are electrically connected. Electrode plates 43b and 44b are provided at the lower ends of the current collectors 43 and 44, and the upper surfaces of the electrode plates 15b and 16b of the power supply units 15 and 16 provided at each position of the frame 2 by the spring force of the spring. And are electrically connected to each other.

The base end of one rotating shaft 31 is connected to a rotating shaft 45 via a gear system 47, and a driven sprocket 46 (FIG. 11) is fixed to the leading end of the rotating shaft 45. . The drive train 48 is constituted by the gear system 47, the rotating shaft 45 and the sprocket 46. The sprocket 46 is meshable from the upper side of each chain of the drive mechanisms 12, 12 ', 13 (FIGS. 1, 2, 6, and 7) provided at each position of the frame 2. still,
At least one of the gears 47a and 47b of the gear system 47, for example, the gear 47a is formed of an insulating resin member and is electrically insulated from each drive mechanism on the frame 2 side.

The electrode section 33 is composed of an electrode socket 50, an electrode head 51, a spring 52, seals 53 and 54, as shown in FIG. Electrode socket 50
Has a cylindrical shaft hole 50a and a large-diameter concave portion 50b concentrically provided, and is fitted and attached to a tip of the rotating shaft 31 protruding from a resin bearing 37 via a collar 55 and a seal 53. Have been. A collar 56 is fitted to the end of the rotating shaft 31, and an end plate 57 is fixed to the end surface by a bolt 58. The electrode socket 50 cannot be rotated relative to the rotating shaft 31 by a key and a key groove (both not shown), and cannot be moved in the axial direction by a collar 56 and an end plate 57. The electrode socket 50 is coated with a corrosion-resistant resin member 59 from the front end face of the flange 50b to the rear end face that comes into contact with the seal 53 to be protected from the plating solution.

The electrode head 51 has a truncated conical shape, and has a large diameter rear end sized to fit into the recess 50 b of the electrode socket 50. The electrode head 51 is externally slidably fitted to a collar 56 through a shaft hole in the axial direction, and is prevented from deviating by an end plate 57. Spring 52
Are contracted between the electrode socket 50 and the electrode head 51, and press the electrode head 51 against the end plate 57. The electrode head 51 has a rear end slightly fitted into the opening end of the concave portion 50b of the electrode socket 50 in a state shown in which the front end is abutted and locked on the end plate 57. It is pushed into the recess 50b against the spring force. These electrode socket 50, electrode head 51, collar 56
Is formed of a copper member having excellent electrical conductivity.

The seal 53 includes a packing 60 and a seal ring 61. Packing 60, 61
The packing 60 is attached to the end face of the collar 55 and the packing 61 is attached to the electrode socket 50 in close contact with each other.
Are in close contact with each other. Note that an O-ring is provided in the seal ring 60 to maintain liquid tightness with the rotating shaft 31. Thereby, the space between the tip of the rotating shaft 31 and the electrode portion 33 is maintained in a liquid-tight manner, and the intrusion of the plating solution is prevented.

The seal 54 includes a packing 62, a seal ring 63, and a packing 64. The packing 62 is fitted over the electrode socket 50 to form a flange 50b.
Is in contact with the end face of The seal ring 63 has a bottomed cylindrical shape slightly larger in diameter than the electrode socket 50, is fitted to the electrode socket 50 slidably in the axial direction through a shaft hole in the end surface (bottom surface), and has an end surface. It is in contact with the packing 62. The packing 64 is fitted between the electrode socket 50 and the seal ring 63, and its end face is
And slightly protrude from each open end of the seal ring 63. The seal 54 is used to remove the electrode socket 50 from the plating solution.
Of the electrode socket 5 while protecting the surface of the
The electrode head 51 is prevented from penetrating into the recess 50b, and the electrode head 51 is prevented from being immersed in the plating solution.

The operation will be described below. As shown in FIGS. 1 to 4, first, the work transport mechanism 3 is suspended and transported by a crane (not shown) via hooks 20 c, 20 c, and is mounted on the position of the workpiece mounting section 5 of the frame 2. Is placed. In the work transfer mechanism 3, the sprocket 25 of the driving force transmission unit 23 meshes with the chain 11 c of the driving mechanism 11 at this position, and the sprocket 46 of the driving force transmission unit 48 meshes with the chain 12 c of the driving mechanism 12. On the other hand, a work, for example, a gravure printing cylinder roll (hereinafter simply referred to as “roll”) 100 (FIG. 14) to be subjected to chrome plating is carried into the work mounting section 5. In the roll 100, a surface of an iron cylinder is plated with copper, and desired characters, patterns, and the like are engraved on the surface by etching or the like. And roll 1
In the reference numeral 00, both ends of the cylindrical hole 100a are arranged to face the electrode portions 33 and 34 of the work transfer mechanism 3, respectively.

Next, the motor 11a of the driving mechanism 11 rotates, and the rotating shaft 24 is rotated by the chain 11c via the sprocket 25 of the driving force transmitting section 23 of the work transfer mechanism 3. The rotation of the rotating shaft 24 is transmitted to sprockets 28 and 28 ′ via a speed reducer 27,
0, 30 'rotate. Accordingly, the hangers 21 and 22 move from both left and right sides toward the center, and the left and right electrode portions 3 are moved.
3 and 34 are fitted to the open ends on both sides of the cylindrical hole 100a of the roll 100.

That is, as shown in FIG. 14, when the hanger 21 moves, the electrode head 51 enters the open end of the cylindrical hole 100a of the roll 100, and the tapered surface 51a contacts the inner edge of the open end 100b of the cylindrical hole 100a. , Enters the recess 50 b of the electrode socket 50 against the spring force of the spring 52. Accordingly, the packings 64 and 62 are compressed by the end face 100b of the roll 100, and the open end face 50c of the electrode socket 50 and the open end face 63a of the seal ring 63 are pressed against the end face 100b of the roll 100. Hanger 2
The same applies to No. 2. Then, when the pressing force of the opening end face 50c of the electrode socket 50 to the end face 100b of the roll 100 reaches a predetermined pressure, a torque limiter (not shown) operates and the motor 11a of the drive mechanism 11 stops. At the same time, the speed reducer 27 of the driving force transmission unit 23 of the work transfer mechanism 3
Is held at the stop position. In this way, the work transfer mechanism 3 supports the axial position of the roll 100 by clamping it from both ends with a predetermined pressing force. Moreover, hangers 21, 2
2 can hold the roll 100 in the center of the frame 2 to move symmetrically with respect to the rail 20.

In the electrode section 33, the opening end face 50c of the electrode socket 50 makes surface contact with the end face 100b of the roll 100, and the tapered surface 51a of the electrode head 51 makes line contact with the inner edge of the opening end of the cylindrical hole 100a. As a result, the electrode portion 33 is
Very good electrical contact with 00. Further, the electrode socket 50 and the electrode head 51 are well sealed by the seal portions 53 and 54 and are protected from the plating solution. Electrode part 3
4 is the same as the electrode section 33. In addition, since both ends of the rotating shafts 31 and 32 are supported by the hangers 21 and 22, they do not bend, and can support the roll 100 horizontally and extremely accurately.

The drive mechanism 12 rotates the motor 12a after the roll 100 is mounted on the work transport mechanism 3, and rotates the sprocket 46 of the drive force transmission unit 48 via the chain 12c. The rotation of the rotation shaft 45 is transmitted to the rotation shaft 31 via the gear system 47, and the roll 100 rotates. At this time, the rotating shaft 32 rotates together. The roll 100 is rotated in this manner, and it is confirmed that the roll 100 is securely mounted on the work transport mechanism 3.

Next, the work transfer mechanism 3 is lifted by the crane and is sequentially transferred to a pre-processing step.
That is, the roll 100 is first transported to the alkali treatment section 6 to remove fats and oils adhering to the surface, then washed at a hot water washing position, and further activated to remove rust and oxide film on the surface. After that, it is washed with a shower. These pretreatments are performed in each processing step while rotating the roll 100 by the drive mechanism 13 in the same manner as described above.

After the pretreatment of the roll 100 is completed, the work transport mechanism 3 is transported to the position of the chrome plating tank 7 (FIGS. 3 and 4), and the roll 100 is immersed in the plating solution in the plating tank 7. The rotating shafts 31 and 32 are
To the portions before the liquid draining plates 38 and 39 are accommodated in the plating tank 7 and immersed in the plating solution. Since the roll 100 is held at the center of the frame 2 by the hangers 21 and 22, the roll 100 is housed in the center of the plating tank 7 and completely immersed in the plating solution. Shutters 7c and 7d are provided at the centers of the left and right side walls 7a and 7b of the plating tank 7, respectively.
Openings are opened by the rotation shafts 1 and 32 and closed when the rotation shafts 31 and 32 reach predetermined positions. Drain plates 38, 39
Rotate with the shafts 31 and 32 and rotate the shutters 7c and 7
The plating solution leaking from the gap d through the rotating shafts 31 and 32 is washed down by centrifugal force into the liquid reservoirs 7e and 7f. The plating solution stored in the solution storage chambers 7e and 7f is collected in the plating tank 7.

The rotating shaft 31 of the work transport mechanism 3 is rotated by the driving mechanism 13 via the driving force transmitting section 48 at the position of the plating tank 7 to rotate the roll 100 at a predetermined rotation speed. On the other hand, the electrode plates 43b and 44b of the current collectors 43 and 44 mounted on the hangers 21 and 22 are pressed against and electrically connected to the electrode plates 15b and 16b of the power supply units 15 and 16 of the frame 2. Therefore, roll 100
Is connected to the negative electrode of the power source for plating via rotating shafts 31 and 32. The plating solution in the plating tank 7 is connected to the positive electrode of the power supply. The surface of the roll 100 is subjected to chrome plating while rotating while being fully immersed in the plating solution. As a result, the roll 100 is protected by being chrome-plated satisfactorily on the entire surface of the copper on which the characters, patterns and the like are engraved. The chrome plating tank 7
A plurality of rolls are provided in parallel, so that a plurality of rolls can be processed in parallel at the same time.

When the plating of the roll 100 is completed, the work transport mechanism 3 is lifted, and the roll 100 is lifted from the plating tank 7. Next, the work transfer mechanism 3
Is transported to the washing shower section 8 (FIG. 2). Roll 1
At 00, the surface is washed with water while being rotated and driven by the drive mechanism 13 in the washing shower section 8, and the plating solution is removed.

After the roll 100 is washed with water, the polishing section 9
And the surface is polished (coarse polished) while being rotated by the drive mechanism 13. In the chrome plating, the ink ride is poor because the ink is repelled. Therefore, in order to improve the riding of the ink, the surface is polished and fine scratches are formed on the surface to make it rough. When the polishing operation of the roll 100 is completed, the work transport mechanism 3 is transported to the workpiece take-out section 10, and the hangers 21 and 22 are moved in a direction away from each other by the drive mechanism 11 ', and the chucks 33 and 34 are accordingly moved by the roll 1
Separated from 00. Next, the roll 100 is unloaded from the plating apparatus 1 by an unloading mechanism (not shown). In this manner, the plating apparatus 1 automatically performs a series of processing steps for plating the surface of the roll 100.

[0039]

As described above, according to the present invention, according to the present invention, regardless of the length of the work to be plated, the work can be immersed in the plating solution at a substantially central position of the plating tank. In addition, the entire work can be plated under substantially the same conditions, and more uniform plating can be performed. In addition, it becomes possible to automate a series of plating processes, thereby improving work efficiency.

According to the second aspect of the present invention, the stroke of the rotary shaft can be made longer by using a chain as a drive mechanism for driving the rotary shaft for holding the work, and a wide range of work from a long size to a short size can be obtained. It is possible to improve the working efficiency and the versatility of the plating apparatus.

[Brief description of the drawings]

FIG. 1 is a partial plan view of a plating device according to the present invention on a work mounting portion side.

FIG. 2 is a partial plan view of a plating device according to the present invention on a work take-out portion side;

FIG. 3 is a front view of one side of a work transfer mechanism of the plating apparatus according to the present invention.

FIG. 4 is a front view of the other side of the work transport mechanism of the plating apparatus according to the present invention.

FIG. 5 is a front view of the drive mechanism 11 of FIG.

FIG. 6 is a front view of the drive mechanism 12 of FIG.

FIG. 7 is a front view of the driving mechanism 13 of FIG.

FIG. 8 is a cross-sectional view of the power supply unit 15 of FIG. 1 taken along the line VIII-VIII.

9 is a cross-sectional view of a main part along an arrow line IX-IX in FIG.

FIG. 10 is a cross-sectional view of a main part along the line XX in FIG. 4;

FIG. 11 is a side view of a main part of FIG. 3;

FIG. 12 is a side view of a main part of FIG. 4;

FIG. 13 is an enlarged sectional view of the electrode section of FIG.

14 is a cross-sectional view showing a state where the electrode unit of FIG. 13 is mounted on a work (roll).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plating apparatus 2 Frame 3 Work transfer mechanism 7 Plating tank 11, 11 ', 12, 12', 13 Driving mechanism 15, 16 Power supply part 20 Rail 21, 22 Hanger 23, 48 Driving force transmission part 31, 32 Rotation axis 33, 34 Electrode 43, 44 Current collector 50 Electrode socket 51 Electrode head 53, 54 Seal 100 Roll (work)

Claims (2)

[Claims] 1. A plating apparatus in which both ends of a roll-shaped work are sandwiched, immersed in a plating tank, and energized while rotating the work to perform plating. A rail that is placed on a side frame disposed along the top and horizontally bridged above the plating layer, and that can be suspended and conveyed to a predetermined position; and a rail that is suspended from the rail and along the rail. A pair of horizontally movable hangers, and the pair of hangers disposed on the rail are symmetrically separated from each other.
A first driving force transmitting unit to be approached, and a pair of conductive rotating shafts disposed at the lower ends of the hangers so as to be horizontally and coaxially opposed to each other, and both ends of which are rotatably supported, A pair of electrode portions mounted on each of the opposite ends of the rotating shafts and electrically connected to each other to sandwich both ends of the work, and connected to any one of the base ends of the rotating shafts, A work transfer mechanism including: a second drive force transmission unit that transmits a drive force; and a current collection unit that is attached to a base end of the rotation shaft, is electrically connected, and energizes the work through the electrode unit. A first driving mechanism disposed at a predetermined position of the side frame to move the pair of hangers via the first driving force transmitting unit and to clamp the work by the electrode units; Is disposed at the plating tank position A second driving mechanism for rotating the rotating shaft via the second driving force transmitting unit; and a power supply disposed at the plating tank position of the side frame and electrically connected to the current collecting unit to supply current. And a plating apparatus. The second drive mechanism is externally supported by a drive motor, a drive sprocket mounted on the drive motor, and a guide extending along a moving direction of the hanger. A chain that is slidable on the guide and meshes with the driving sprocket and rotates along the guide, wherein a second driving force transmitting portion of the rotation shaft is capable of meshing with the chain. 2. The plating apparatus according to claim 1, further comprising a driving sprocket, wherein the driven sprocket is driven by being engaged with the chain from above at a position where the rotating shaft holds the work. 3.