JP4034287B2 - Chromium plating barrel equipment - Google Patents

Description

  The present invention relates to a barrel apparatus used for chromium plating on a small work group such as a ball bearing, a bolt, and a nut.

In general, high current density is required when chromium plating is performed. For this reason, when chromium plating is performed using a rotating barrel, for example, as disclosed in Japanese Patent Application Laid-Open No. 56-90998, a rotating barrel serving as a cathode and an anode facing the rotating barrel has been proposed.
JP-A-56-90998

However, in the barrel apparatus of the above cited reference 1, the rotating barrel is placed on the pair of left and right rotating drive shafts, and the rotating barrel is energized through the contact surface between the rotating drive shaft and the rotating barrel. Yes. Therefore, will be plated contact surface of the rotating barrel with the Rotational drive shaft, with wasting expensive plating solution, together with the contact surfaces are plated, there are problems such as the energization amount is changed .
Then, an object of this invention is to provide the barrel apparatus for chromium plating which eliminated the malfunction of the said barrel apparatus.

According to the first aspect of the present invention, the rotating barrel made of a conductive material supported on the frame is connected to the cathode and the conductor for connecting to the anode is faced in the rotating barrel. In the barrel device, the rotating barrel is rotatably attached to bearing members provided on the frame at both ends, and a one-side bearing member that supports one end of the rotating barrel provided on the frame is a conductive material continuous with the cathode side. configured, and configure the other side bearing member for supporting the other end of the rotating barrel with an insulating material provided on the thirsty, concave either conductive shaft supported thereto and the one-side bearing member In addition, an insulating material is formed on the outer surface of the rotating barrel, and on the outer surface on the concave side of the conductive one-side bearing member and the shaft supported by the outer surface of the rotating barrel. alms, and with constituting the conductor with carbon, which insulating Configure the barrel device comprising by fitted supported on the conductive rod constituting the anode which is inserted into the rotating barrel through an insertion hole provided on the side bearing member, further, as well as erection of the barrel unit to the underframe, the anode A chrome plating barrel apparatus is characterized in that a board is attached to the underframe so as to face the lower surface of the rotating barrel .
The present invention provides a chromium plating barrel apparatus according to claim 1, by decentering above the center position of the insulating other side bearing member for rotatably supporting the rotating barrel, said conductive rod characterized by providing the insertion hole for inserting a.
The present invention provides a chromium plating barrel apparatus according to claim 1 or 2, surrounds the outer periphery of the conductor made of the carbon which is provided in said rotating barrel, provided no number of liquid passage holes It is characterized by applying an insulating covering.

Thus, according to the first aspect of the invention, the rotating barrel is rotatably attached to the bearing member provided on the frame at both ends thereof, and one end of the rotating barrel provided on the frame is supported. form up of conductive material contiguous the side bearing member and the cathode side, and Configure the other side bearing member for supporting the other end of the rotating barrel with an insulating material provided in thirst, this support and the one-side bearing member One of the conductive shafts is concave, the other is convex to fit inwardly, and the outer surface of the rotating barrel, the conductive one-side bearing member, and the shaft supported by this Among them , an insulating material is applied to the outer surface on the concave side, and the conductor is made of carbon, and this is inserted into the rotating barrel through an insertion hole provided in the other insulating bearing member. by configuring the plating apparatus comprising by fitted supported on the conductive rod constituting the anode, Easily anode current collector made of carbon, in the rotary barrel, the barrel unit is obtained that can be faced in isolation from the rotary barrel. Furthermore, while bridging the barrel device to the underframe, by which to face the lower surface below the rotating barrel to attach the anode plate to underframe, high density current is obtained which is suitable for chromium plating. Further, there is no cathode portion in contact with the plating solution, except the rotating barrel inner surface which contacts the workpiece, it is Rukoto prevent the consumption of unnecessary plating solution.
Further, when the invention according to claim 2 is provided, the insertion hole for attaching the conductive rod constituting the anode is provided above the center position of the other side bearing member that rotatably supports the rotating barrel. The work accommodated in the rotating barrel can be separated as much as possible from the conductive rod facing the barrel, and problems such as the plating layer scorching or non-uniformity due to the work touching the conductor can be solved.
When according to the invention according to claim 3, surrounds the outer periphery of the conductor made of carbon attached to the rotary barrel, it was subjected to insulating covering body provided numerous liquid passage holes, the electrically conductor while securing the flow of the plating solution into, the workpiece accommodated in rotation the barrel is prevented reliably to touch the conductors within the rotating barrel, therefore, uniform without Rukoto plating layer of the workpiece is burnt Reliable high-quality plated products .

One embodiment of the present invention will be described in detail with reference to FIGS.
In the drawing, A indicates a barrel device, which comprises a rotating barrel 1 and a frame 2 that rotatably supports the barrel 1 at both ends thereof.
The rotating barrel 1 is made of a copper plate or other conductive material, and is formed of a polygonal cylindrical barrel portion 1a and end plates 1b and 1b that close both ends thereof, and a workpiece entrance / exit at one side portion of the barrel portion 1a. 1c, and a door 1d made of a copper plate or other conductive material is detachably attached to the doorway 1c. The barrel portion 1a and the lid 1d are provided with innumerable liquid passage holes, and an insulating film (not shown) is applied to the outer surface of the rotating barrel 1 leaving innumerable liquid passage holes, which will be described later. An insulating film (not shown) is also applied to the outer surface of the conductive shaft 5 protruding from the end plate 1 b on one side of the rotating barrel 1.

As is apparent from FIG. 1 and FIG. 2, the frame 2 is connected by rod-like connecting members 2c and 2c that connect the side plates 2a and 2b on both sides at the upper and lower ends thereof, A mounting space for the rotating barrel 1 is formed, bearing members 3 and 4 are provided on opposing surfaces of the side plates 2a and 2b on both sides, and the rotating barrel 1 is rotatably supported by these bearing members 3 and 4 at both ends thereof.
More specifically, the one side plate 2a constituting the frame 2 and the bearing member 3 provided thereon are formed of brass or other conductive material, and the one side bearing member 3 is the one side plate. It is inserted into the mounting hole 2a-1 provided in 2a, protrudes inward from the inner surface of the one side plate 2a, and is fitted to the concave shaft 5. In the illustrated example, a flange 3a is provided at the outer end of the bearing member 3, and the flange 3a is attached to the one side plate 2a so as to be electrically connected to the one side plate 2a with a screw. The convex one-side bearing member 3 can be attached directly to the one-side end plate 1b without necessarily requiring the flange portion 3a. Accordingly, the convex one-side bearing member 3 means only a portion that fits into the concave portion of the shaft 5 that does not include the flange portion 3a that exists to attach the one-side bearing member 3 to the one-side plate 2a.
In addition, an insulating film is applied to the outer surface of the flange 3a of the illustrated one side bearing member 3 and the one side plate 2a. The insulating film (not shown) is applied by applying a coating of an electrical insulating material such as a synthetic resin or spraying the colloidal solution.
The rotary barrel 1 is provided with a shaft 5 made of copper or other conductive material that protrudes outward from the one side end plate 1b. The shaft 5 has a concave shape that opens to the outside, and the convex portion is formed in the concave portion. The one side end of the rotating barrel 1 is supported by the bearing member 3 by slidingly fitting the protruding portion of the one-side bearing member 3 in a shape. In addition, it is preferable to give the ring 5a-1 which consists of resin and other insulating materials in the part facing the inner surface of the one side plate 2a of the shaft 5.

Further, the other side plate 2b constituting the frame 2 and the other side bearing member 4 provided thereon are formed of polytetrafluoroethylene resin or other insulating material, and the other side bearing member 4 is the other side of the rotating barrel 1. It is inserted into the attachment hole 2b-1 provided in the side plate 2b and attached to the one side plate 2a.
More specifically, the other side bearing member 4 has a cylindrical shape having a flange 4a at its inner end, and the cylinder has a large diameter portion 4b continuous with the flange 4a and a small diameter portion 4c slightly thinner than this. The small-diameter portion 4c is connected to the small-diameter portion 4c and a small-diameter portion having a threaded portion 4d on a circumferential surface having substantially the same diameter. In attaching this other side bearing member 4, it inserts from the inner side of the rotation barrel 1 in the attachment hole 1b-1 provided in the other side end plate 1b of the rotation barrel 1, and the drive gear 6 mentioned later on the outer periphery of this small diameter part 4c. The driven gear 7 made of an insulating material such as a resin meshing with the base plate is loosely fitted, and the spacer 8 is fitted on the outer side thereof. The nut 9 is screwed in from the outside of the side plate 2b and fastened to the other side plate 2b, whereby the other side bearing member 4 is fixed to the other side plate 1b of the rotary barrel 1 by pressure.
The rotating barrel 1 and the driven gear 7 are integrally fastened with a screw 1b-3 to a protrusion 1b-2 protruding from the other side plate 1b of the rotating barrel 1.
10 shows an insertion hole provided in the eccentric position of the bearing member 4, the conductor 12 formed carbon emissions or found in the insertion portion of the insertion hole 10 was inserted rotating barrel 1 elaborate inserted into the conductive rod 11 The conductor 12 is mounted in the rotating barrel 1 as described below.
The conductive rod 11 is electrically connected to the outer end thereof at a lead plate 13 orthogonal to the side plate 2b and extending upward along the side plate 2b, and the cylindrical current collector 12 of the conductive rod 11 is connected. Is covered with an insulating material 14 such as a vinyl chloride resin over the entire peripheral surface on the base side to which no lead is applied and the four peripheral surfaces from the lower end of the lead plate 13. That is, the insulating material 14 includes a cylindrical covering portion 14 a that covers the base side of the columnar conductive rod 11 and a rectangular box-shaped covering portion 14 b having a desired length that covers the four peripheral surfaces from the lower end of the lead plate 13. And the contact part of the outer end of the cylindrical coating | coated part 14a and the inner surface of the box-shaped coating | coated part 14b is welded integrally.
An example of means for attaching the conductor 12 to the current collecting rod 11 will be described. The conductor 12 is gripped and faced in the rotary barrel 1 in advance, and in this state, a covering portion 14a is applied to the base side in advance. The conductive rod 11 is inserted into the rotating barrel 1 from the outside of the other side bearing member 4 through the insertion hole 10, inserted into the hole 12 a provided in the center of the conductor 12, and then provided at the tip of the conductive rod 11. A screw 15 is applied to the screw hole 12b via a washer 16 on one side, and the other washer 16 provided by fitting the conductor 12 on the inner end of the cylindrical insulating material 14a in advance on the conductive rod 11. Tighten and fix against. Thus, when it is clamped to the other side bearing member 4 to the other side plate 2b, in advance, since the interpolation hole 10 located at a position eccentric to the upper of the other side bearing member 4, the current collector 12 Can separate the workpiece placed in the rotating barrel 1 as much as possible.

Barrel apparatus A above SL, as shown in FIGS. 2 and 3, the plating tank to the pin 17, 17 provided on the installed within (not shown) underframe B, side plates 2a, the upper end portion of 2b It is constructed and used in the chrome plating barrel apparatus of the present invention, which is suspended by hooks 18, 18 provided on the, and obtains a high-density current suitable for chrome plating . That is, as shown in FIG. 4, the underframe B includes left and right side plates 19, 19 as viewed from the front, connecting rods 20, 20, 20 connecting these at the upper and lower ends, and the pins 17, A support space for supporting the barrel device A is formed between them, and an electric motor 22 is provided on the inner upper side of the right side plate 19. The drive gear 6 is driven by the gear 22 through the gear train 23. Reference numeral 24 denotes an anode panel attached to the frame B so that it faces the lower surface of the lower barrel 1 when the barrel device A is suspended from the frame B. Reference numeral 25 denotes a support piece for receiving the lower back surface of the one side plate 2a. Is a support piece facing the front surface of the other side plate 2b, and 27 is a terminal plate for connecting an external power source provided at the upper ends of the side plates 2a and 2b. 2 and 3, L indicates the plating liquid level in the plating tank, and the height position of the liquid level L is set so that the conductor 12 provided in the rotating barrel 1 is immersed in the liquid. as shown in, by exposing the liquid surface above a portion of the rotary barrel it can be reduced the time for immersion in the plating solution of the rotating barrel 1 inner surface.
In the above-described embodiment, the shaft 5 provided on the rotating barrel 1 has a concave shape that opens to the outside, and the bearing member 3 has a convex shape that fits in the concave portion of the concave shaft 5. Alternatively, the shaft 5 may be convex, the bearing member 3 may be concave, and the protruding portion of the convex shaft 5 may be inscribed in the concave portion. In this case, an insulating film is applied to the outer surface of the concave bearing member 3. In addition, the axis | shaft 5 defined here means only the part which carries out inward fitting to the concave space of the concave one side bearing member 3. As shown in FIG.

According to the chrome plating barrel apparatus shown in the above embodiment of the present invention, the one-side bearing member 3 that supports the shaft 5 at one end of the rotating barrel 1 provided on the frame 2 is a conductive material continuous with the cathode side. Since it is comprised, the rotation barrel 1 can be easily made into a cathode.
The other side bearing member 4 that supports the other end of the rotating barrel 1 provided on the frame 2 is made of an insulating material, while the one side bearing member 3 and the shaft 5 supported by the one side are either One is concave, the other is convex to fit inwardly, and the surface of the rotating barrel 1 and the outer surface in contact with the plating solution of the one side bearing member 3 and the shaft 5 supported by the insulating material since subjected to coating (not shown), since the barrels device a except rotating barrel inner surface in contact with the workpiece never touch the plating solution can save the wasteful consumption of the plating solution, economic and stable good Plating treatment can be performed.
Thus also utilize other side bearing member 4 of the insulation, the electrical conductor 12 consisting of front Symbol carbon in the Shirubedenbo 11 connected to the anode through an insertion hole 10 provided thereto so as to fit the support Therefore, the barrel apparatus A can be obtained in which the anode 12 made of carbon can easily face the rotating barrel 1 while being isolated from the rotating barrel 1 constituting the cathode. Further, since the barrel device A is installed on the frame B, and the anode plate 24 is attached to the frame B so as to face the lower surface of the rotating barrel 1, a high-density current suitable for chromium plating is passed. it is possible.
Furthermore, as described above, since the insertion hole through which the conductive rod 11 is inserted is provided on the upper side of the other bearing member 4 that rotatably supports the rotary barrel 1, the conductor in the rotary barrel 1 is provided. The workpiece accommodated in the rotating barrel 1 can be separated from the rotary barrel 1 as much as possible, and the workpiece can be prevented from coming into contact with the conductor 12 and scorching of the plating layer as much as possible.

  In the drawings, reference numeral 28 denotes a flange disposed on the lid 1d so as to be rotatable on the left and right sides. The lid 1d is attached to the doorway 1c in a closed state by being inserted into the key holes 30 and 30 disposed on the left and right sides of the frames 29 and 29, respectively.

  In order to prevent the workpiece from coming into contact with the conductor 12 when the workpiece is subjected to chrome plating using the apparatus of the present invention, the conductor as shown in FIG. 5 shown as another embodiment of the present invention. It is preferable to cover the outer periphery of 12 with a covering 31 made of an insulating material provided with innumerable liquid passage holes 31a.

More specifically, the covering 31 is made of a resin punching plate having liquid passage holes made up of countless small holes, or a resin molded plate or woven cloth having countless small holes formed on the entire surface. Alternatively, it is composed of a molded body made of nonwoven fabric, and the like, including the cylindrical covering portion surrounding the outer peripheral surface of the conductor 12, and the head of the screw 15 applied to one end of the conductive rod 11, and the entire end face thereof, The other end washer 16 was covered. Although not particularly illustrated, the covering 31 is prepared as a half-shaped molded body along the longitudinal direction, and the conductor 12 is sandwiched between the two half-shaped portions, and then the alignment is performed. The part is bound by a binding means such as a clip or a melting means, or both halves are hinged on one side in the longitudinal direction, and the conductor 12 is sandwiched between them. It can be attached so as to cover the outer periphery of the conductor 12 by, for example, bonding with a bonding means such as a welding means.
By attaching the porous insulating covering 31, it is possible to ensure the flow of the plating solution to the conductor 12 and to allow the workpiece contained in the rotating barrel 1 to touch the conductor 12 in the rotating barrel 1. Therefore, it is possible to reliably prevent the plating layer of the workpiece from being burned and to obtain a uniform and high-quality plated product. However, when the amount of work put into the rotating barrel 1 is small, or as described above, the conductor 12 constituting the anode is disposed above the center position of the other side bearing member 4 that rotatably supports the rotating barrel 1. By providing the insertion hole 10 to be attached, when there is no possibility that the workpiece accommodated in the rotating barrel 1 touches the conductor 12 in the rotating barrel 1, it is not necessary to attach the covering body 32.

The front view which cut away a part of barrel apparatus for chromium plating of an example of an embodiment of the present invention. The front view of the state which supported the apparatus shown in FIG. 1 on a base frame. The side view of the apparatus of the state shown in FIG. The front view of a frame. The enlarged front view which cut out some apparatus of the other Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating barrel 2 Frame 2a Side plate 2b Side plate 3 Bearing member 4 Bearing member 5 Shaft 10 Insertion hole 11 Conductive rod 12 Conductor 31 Covering body 31a Fluid passage hole A Device of the present invention B Mount

Claims (3)

In a chrome plating barrel apparatus in which a rotating barrel made of a conductive material supported on a frame is connected to a cathode, and a conductor connected to the anode is faced in the rotating barrel, the rotating barrel is mounted on both ends thereof. A one-side bearing member that is rotatably attached to a bearing member provided on the frame, and that supports one end of the rotating barrel provided on the frame, is made of a conductive material connected to the cathode side, and the rotating barrel provided on the frame is other side bearing member for supporting the other end forms up of an insulating material, either conductive shaft supported thereto and the one-side bearing member in a concave shape, a convex inscribed fitted the other to The outer surface of the rotating barrel, the conductive one-side bearing member and the shaft supported by the same are provided with an insulating material on the concave outer surface, and the conductor is made of carbon. together, through a through hole provided on the other side bearing member of insulating this Fitted is supported by the conductive rod constituting were inserted into the rotary barrel anode constitutes a barrel device comprising, furthermore, while bridging the barrel device to the underframe, the rotary barrel attached to the anode plate to underframe A barrel device for chrome plating characterized by facing the lower surface of the chrome plating. By decentering above the center position of the insulating other side bearing member for rotatably supporting the rotating barrel, to claim 1, characterized in that a said insertion hole for inserting the conductive rod The barrel apparatus for chrome plating as described. It surrounds the outer periphery of the conductor made of the carbon which is provided in the rotating barrel, according to claim 1 or 2, characterized in that subjected to insulating covering member having a free number of liquid passage holes Chrome plating barrel equipment.

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