JPS6133062B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an immersion plating device that performs plating by immersing an object to be plated in a plating liquid tank, and in particular, an immersion plating device that is designed to remove excess plating liquid from the object to be plated. Regarding.

When performing immersion plating such as hot-dip galvanizing, it is necessary to immerse the object to be plated in a plating liquid tank, take it out, and perform a shaking operation to remove excess plating liquid and smooth the plating surface.

This shaking off operation is performed by an operator manually dipping the tool containing the object to be plated into a plating liquid tank, then taking it out and moving it up and down.

However, such manual plating work causes variations in the smoothness of the plating surface, and immersion plating and plating work of heavy objects to be plated require heavy labor.

A device has also been proposed in which the tray holding the object to be plated is held between the arms, moved up and down, and then rotated after being removed from the plating solution.
No. 31563), the gripping arm is large, so if this is used for hot-dip galvanizing, a large amount of zinc will adhere to the gripping arm.

The present invention takes the above-mentioned facts into consideration and aims to provide an immersion plating device that can perform plating work automatically and with high quality.

The present invention includes a hanging device that moves a mounting tool containing an object to be plated up and down and immerses it in a plating liquid tank, and a hanging device that rotates the mounting tool about a vertical axis after being pulled out from the plating liquid tank to remove the object. a rotational drive device that shakes off the plating liquid, the rotational drive device includes a rotational shaft and a drive source that applies rotational force to the rotational shaft, and the suspension device has a traction device whose intermediate portion passes through the rotational shaft. The installation tool is characterized in that the installation tool can be immersed in and taken out from the plating liquid tank by the movement of the pulling body, and the installation tool is connected to the rotating shaft by increasing the tension of the pulling body and a rotational force is applied to the installation tool. .

Therefore, in the present invention, the mounting tool that accommodates the object to be plated can be made compact, and only the mounting tool and the object to be plated are immersed in the plating liquid, and the amount of plating liquid that adheres to the mounting tool is small. The plating liquid can be removed efficiently when shaking off. In addition, the traction body that moves the installation tool up and down does not pinch the installation tool as in conventional examples, so it can withstand heavy weight and is made smaller, eliminating the protrusion of the installation tool to the surroundings and making the plating liquid tank smaller. . Furthermore, since the suspension device allows the installation tool to be easily connected to and separated from the rotary drive device, no clutch means or the like is required.

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show the immersion plating apparatus according to the present embodiment, in which a mobile cart 10 is suspended from a rail 12 and can be horizontally moved from a loading area 14 to above a plating liquid tank 16. ing. The movable trolley 10 is formed into a tower shape by combining angle members, and a drive motor 18 is attached to the upper end of the movable trolley 10 to drive the movable trolley in the horizontal direction.

As shown in detail in FIG. 3, a cylindrical rotating shaft 20, which constitutes a part of a rotational drive device, is supported at the bottom of the moving cart 10 with its axis vertically by a pair of radial bearings 22 and a thrust bearing 24. ing.

A pulley 26 is fixed to the upper end of this cylindrical rotating shaft 20, and a V-belt 32 is stretched between the pulley 30 and a pulley 30 fixed to the output shaft of a motor 28, which is a drive source. Therefore, the motor 28 is capable of driving the cylindrical rotation shaft 20 during rotation, and it is preferable that the motor 28 is a variable motor whose output rotation speed can be changed.

Four arms 34 protrude in the radial direction from the lower end of the rotating shaft 20 protruding from the radial bearing 22. These arms 34 are adapted to come into close contact with the installation tool 36 when the installation tool 36 is raised, as shown in detail in FIG. 4, so as to transmit rotational force to the installation tool 36.

The installation tool 36 is made up of a plurality of rods welded together to form a framework. This rod includes a large ring 40 and a small ring 42 arranged concentrically around a central member 38 that is the center of rotation, a radial member 44 connecting these rings, and a plurality of large rings 40 arranged above and below.
A plurality of objects to be plated can be accommodated between the large ring 40 and the small ring 42. The objects to be plated are preferably arranged evenly around the center member 38, thereby eliminating unbalance during rotation.

A hook 48 is attached to the upper end of the center member 38, and a hook 48 is attached to the upper end of the center member 38, and a hook 48 is attached to the upper end of the center member 38.
The lower end of 0 can be connected. The upper end of this chain 50 passes through the cylindrical rotating shaft 20 and is guided upward, and is wound onto a winding drum 52 that is pivotally supported near the upper end of the movable cart 10. The winding drum 52 has a horizontal axis, and is rotated by the driving force of a motor 54 to wind up and unwind the chain 50, thereby making it possible to move the mounting tool 36 up and down.

In addition, a vibrator 5 is installed in the middle part of the chain 50.
6 is interposed to prevent plating scratches from occurring on the surface of the object to be plated. Further, a rotary joint 57 is interposed between the biprator 56 and the tip of the chain 50, allowing the installation tool 36 to rotate relative to the winding drum 52 around a vertical axis.

Molten zinc is poured into the plating liquid tank 16, and by immersing the installation tool 36, the molten zinc adheres to the surface of the object to be plated that is accommodated in the installation tool.

The upper part of this plating liquid tank 16 is surrounded by fixed walls 58 on three sides, and a movable wall 6 on the remaining side.
0 is set. This movable wall 60 opens the path for the mounting tool 36 when the movable cart 10 moves, and surrounds the mounting tool 36 in all four directions together with the fixed wall 58 when the mounting tool 36 is placed on the plating liquid tank 16. This prevents the molten zinc shaken off by the shake-off operation from scattering to the surroundings, and facilitates recovery of the molten zinc after shaking off.
An injection pipe 61 is connected to a part of the fixed wall 58, and ammonium chloride is injected onto the object to be plated as necessary to promote fluidity of the deposited zinc.

A cooling tank 62 is provided adjacent to the plating liquid tank 16. Cooling water is injected into the cooling tank 62, and the installation tool 36 is immersed therein to solidify the molten zinc adhering to the surface of the object to be plated.

Further, a chromic acid bath 64 is adjacent to this cooling bath 62, and the plating quality can be improved by immersing the installation tool 36 as necessary.

An unloading conveyor 66 is arranged adjacent to the chromic acid tank 64, and is configured to carry out the objects to be plated after the plating operation in a direction perpendicular to the plane of the paper.

A pair of guide rails 68 and 70 are provided above the plating liquid tank 16.
The moving cart 10 that has moved upward enters between these guide rails 68 and 70. In this case, rollers 72 and 74 with vertical axes are pivotally supported at the lower end of the movable cart 10, and guide rails 68 and 7
0, and the lower end of the movable trolley 10 is held between the guide rails 68 and 70 during the swinging operation to prevent large vibrations from occurring.

The operation of this embodiment configured in this way will be explained. The movable cart 10 is placed on the loading area 14 as shown by the two-dot chain line in FIG. do. This installation tool 3
A plurality of objects to be plated are stored in 6.

After the object to be plated is stored in the installation tool 36,
Winding the chain 50 with the winding drum 52 and installing the installation tool 36
is lifted up and pressed against the arm 34. After that, the movable cart 10 is driven to the right in Fig. 1 to remove the plating liquid tank 1.
6 Place on top.

In this state, the chain 50 is unwound from the winding drum 52 again, the installation tool 36 is immersed in the plating liquid tank 16, and the plating liquid is applied to the object to be plated. In this case, if necessary, the installation tool 36 is immersed in the plating liquid tank 16 multiple times, or the installation tool 36 is repeatedly moved up and down within the plating liquid tank 16, so that the plating liquid is evenly applied to the surface of the object to be plated.

When the application of the plating liquid is completed, the chain 50 is wound around the winding drum 52 again, and the installation tool 36 is pulled out above the plating liquid tank 16 and pressed against the arm 34 again as shown by the solid line in FIG.

If the motor 28 is immediately driven to rotate the cylindrical rotating shaft 20, the mounting tool 36 pressed against the arm 34 will also rotate at the same time, and the centrifugal force will shake off excess molten zinc from the object to be plated. can. Therefore, after being taken out from the plating liquid tank 16, excess molten zinc is removed before it solidifies, and no unevenness or dripping of the plating liquid will occur on the object to be plated. In particular, in this embodiment, since the mounting tool 36 is suspended, the shaking operation can be performed immediately after being removed from the plating liquid tank 16, and even when the weight of the mounting tool 36 containing the object to be plated is large, it is possible to perform the shaking operation. Moreover, a uniform plating film can be obtained.

After the shake-off work is completed, the movable wall 60 is moved to open the path for the installation tool 36, and the movable trolley 10 is moved onto the cooling tank 62. If the vibrator 56 is operated as necessary, plating defects on the surface of the object to be plated can be prevented. Next, by unwinding the chain of the winding drum 52 and winding it up, the mounting tool 36 is immersed in a cooling tank to cool and solidify the molten zinc. Further, the mounting tool is immersed in the chromic acid bath 64 as required, and then placed again on the loading area 14, and after the plating is completed, the object to be plated is unloaded and carried out on the conveyor 66.

In the above embodiment, a chain is used as the hanging device, but the present invention is not limited to this, and it is also possible to use other traction bands such as ropes. Furthermore, although an embodiment has been described in which the mounting tool 36 is pressure-connected to the rotary drive device only during lifting, it is also possible to rotate the hanging device together with the mounting tool, or a clutch or the like may be provided to connect the rotary drive device only when necessary. It can also be connected with an installation tool.

As explained above, since the immersion plating device according to the present invention is provided with a mounting tool hanging device and a rotation drive device, it is possible to make the plating uniform and thin during immersion plating, especially when using a hanging device using a pulling body. Since the installation tool is hung, less plating liquid is carried out.
It has the excellent effect of being able to perform the shake-off work immediately after removing the mounting tool from the plating solution, and allowing easy and high-quality plating work to be performed even on heavy objects.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the immersion plating device according to the present invention, FIG. 2 is a sectional view taken along the line shown in FIG.
FIG. 3 is a sectional view taken along the line shown in FIG. 1, and FIG. 4 is a perspective view showing the installation tool. 10...Moving trolley, 16...Metsuki liquid tank, 20
...Cylindrical rotating shaft, 22...Radial bearing, 24...
... Thrust bearing, 28 ... Motor, 34 ... Arm, 36 ... Installation tool, 52 ... Winding drum, 54 ...
motor.

Claims (1)

[Claims] 1. A hanging device that moves a mounting tool containing an object to be plated up and down to immerse it in a plating liquid tank, and a hanging device that rotates around a vertical axis after the mounting tool is removed from the plating liquid tank to remove plating from the object to be plated. a rotational drive device that shakes off the liquid, the rotational drive device includes a rotational shaft and a drive source that applies rotational force to the rotational shaft, and the suspension device includes a traction body whose intermediate portion passes through the rotational shaft. The installation tool can be immersed in and taken out from the plating liquid tank by the movement of the pulling body, and the installation tool is connected to the rotating shaft by increasing the tension of the pulling body to apply rotational force to the installation tool. Immersion plating device.