JP3127861U - Zinc coating equipment - Google Patents

Abstract

The present invention provides a zinc coating apparatus that is excellent in workability, can form a uniform zinc layer on the surface of an object with high efficiency, and is suitable for coating an object having a large and special shape.
A stirring chamber 30 of a zinc coating apparatus 10 has a lower portion fixed to a case 12 and is provided with a charging portion 44, a motor 60, and a valve 76 for charging a zinc-based paint and a solvent. The valve 76 is connected to an air supply device 82 via an air supply hose 80. Further, stirring means 62 driven by a motor 60 is provided inside the stirring chamber 30, and the discharge port 34 of the stirring chamber 30 is connected to a discharge hose 87 and a spray gun 90 via a valve 84. The connecting hose 88 to be connected is connected. Another air supply device 94 is connected to the spray gun 90 via an air supply hose 92. The contents in the stirring chamber 30 are sent out toward the injection gun 90 by the supply of air from the air supply device 82.
[Selection] Figure 1

Description

  The present invention relates to a zinc coating apparatus for forming a zinc coating (or layer) on the surface of an object to be painted, and more specifically to improvement in workability and work efficiency.

In order to protect the surface of metal products and metal parts, rust prevention treatment is performed as necessary. Rust prevention methods using zinc generally include hot dip galvanization and painting. Hot dip galvanization is a method in which an object is immersed in zinc melted at a high temperature to form a zinc film on the surface. The sacrificial anodic action acts to protect the surface of the steel material. It is said that the rust prevention effect is higher than that. On the other hand, painting is a simple technique, and a coating is formed on the surface of a steel material or the like by applying a paint containing a large amount of zinc powder with a brush or by spraying it mixed with a solvent. Film formation by spraying is known, and is disclosed in, for example, Patent Documents 1 and 2 below.
JP-A-2005-256180 JP 7-148462 A

  However, the background art as described above has the following disadvantages. First, the hot dip galvanizing method has a disadvantage that it cannot be immersed in a zinc bath when the object to be plated becomes large (for example, a bridge pier member). Moreover, since a zinc tank is required, the place where a plating operation is performed is limited. On the other hand, the zinc paint for brush coating generally has a small amount of solvent in order to make it easy to form a film. For this reason, the paint is sticky and the brushing workability is not good, and the coating tends to be difficult to finish uniformly. Furthermore, since painting is performed manually, there is a disadvantage in that work efficiency is reduced when a large area object is painted. Further, in the method of spraying zinc paint with a spray can (or spray container) or the like, zinc having a high specific gravity is submerged in the solvent in the spray can. Therefore, it is necessary to shake the can each time it is used. For this reason, even if the capacity of a spray can or the like is increased in order to efficiently coat a large area, the operator is heavy and cannot hold for a long time, resulting in inconvenience that it is not practical.

  The present invention focuses on the above points. The purpose of the present invention is to improve workability, to form a uniform zinc coating (or layer) on the surface of an object with high efficiency, and to have a large or special shape. The object is to provide a zinc coating apparatus suitable for coating an object.

  To achieve the above object, a zinc coating apparatus according to the present invention opens and closes a zinc paint and solvent inlet, a mixture outlet thereof, a stirring chamber having an air inlet, and the inlet in a sealable manner. A lid or cover, provided in the stirring chamber, stirring means for stirring the zinc-based paint and solvent, driving means for driving the stirring means, a first valve and an air supply port of the stirring chamber; It is connected via a first air supply hose, and is connected to the first air supply means for sending air to the stirring chamber, and to the outlet of the stirring chamber via a second valve and a connecting case. And an injection means for injecting the mixture of the zinc-based paint and the solvent onto the object to be coated.

  Other coating devices include a zinc paint and solvent inlet, a mixture outlet, a stirring chamber having an air supply port, a lid or cover for opening and closing the inlet so as to be sealed, and the inside of the stirring chamber. A stirring shaft provided on the rotating shaft, and teeth formed so as to protrude substantially vertically from the blade, and stirring means for stirring the zinc-based paint and the solvent, A first supply unit that is connected to a driving unit that drives a rotating shaft of the stirring unit and an air supply port of the stirring chamber via a first valve and a first air supply hose, and sends air to the stirring chamber. Gas unit, connected to a discharge port of the stirring chamber via a second valve and a connecting hose, a gun main body having an injection port for an injection and an air outlet, and one end connected to the gun main body A second air supply hose, connected to the other end of the second air supply hose, and the second air supply hose Injection means including a second air supply means for sending the air for injection to the gun body through a gas source, one end of which is connected to the discharge port via the second valve, A discharge hose capable of discharging the contents of the stirring chamber to the outside from the other end by switching the valve is provided. The above and other objects, features and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings.

  In the present invention, while stirring the zinc-based paint and solvent by the stirring means provided inside the stirring chamber, the mixture is sent to the spraying means by air, regardless of the shape and size of the target. A uniform zinc coating or layer can be formed on the surface with good workability and high efficiency.

  Hereinafter, the best mode for carrying out the present invention will be described in detail based on examples.

  First, Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing the overall configuration of the zinc coating apparatus of this embodiment, and FIG. 2 is a diagram showing the operation of this embodiment. As shown in FIG. 1, the zinc coating apparatus 10 of this embodiment includes a case 12, a stirring chamber 30, a stirring means 62 and a motor 60 for driving the same, a spray gun 90, air supply devices 82 and 94, and a control panel 100. In addition, it is composed of multiple cables, hoses, valves, etc. In the illustrated example, the case 12 is a substantially rectangular parallelepiped composed of side surfaces 12A to 12C, a door 14, a bottom surface 12D, and an upper surface 12E. The door 14 is provided with a handle 18, and can be opened and closed by a hinge 16. It has become. In addition, the inside 20 of the case 12 houses a lower portion of the stirring chamber 30, a valve 84, a discharge hose 87, and the like, which will be described later. Further, a caster 22 is provided on the bottom surface 12D of the case 12, so that the zinc coating apparatus 10 can be moved to a desired location and used.

  In the illustrated example, the stirring chamber 30 has a shape in which a substantially cylindrical tube portion 30A and a substantially conical cone portion 30B are continuous in a substantially vertical direction, a flange 32 is provided at the upper end, and a lower end. Is provided with a discharge port 34 for discharging the contents. The stirring chamber 30 is supported in a state where the conical portion 30B is housed in the case inner side 20 by fixing the bottom surface of the fixed cover 36 provided on the outer side surface and the upper surface 12E of the case 12 with a bolt 38 or the like. The A cover 40 having substantially the same outer diameter is provided on the surface of the flange 32, and is fixed by a bolt or the like (not shown).

  The cover 40 is provided with an opening 42 having a predetermined shape and a charging part 44 for charging the zinc-based paint 106 and the solvent 104 into the stirring chamber 30. The opening portion 44 has an opening on the upper end side serving as an insertion port 46 for introducing the zinc-based paint 106 and the solvent 104, and the opening on the lower end side coincides with the opening 42 of the cover 40. They are joined by appropriate means. A slope 48 is formed from the inlet 46 to the opening 42, and the input (zinc-based paint 106 and solvent 104) flows into the stirring chamber 30 along the slope 48. A plurality of locking devices 50 are provided on the side surface of the insertion portion 44, and a detachable lid 52 is provided at the insertion port 46. On the side surface 52 </ b> A of the lid 52, a hook 54 for hanging the arm of the lock device 50 is provided at a position corresponding to the lock device 50. A packing 56 that contacts the edge of the inlet 46 is provided at the edge of the back surface 52 </ b> B of the lid 52. For this reason, when the locking device 50 is locked by being hooked on the hook 54, the packing 56 comes into close contact with the edge of the charging port 46, thereby sealing the charging port 46. Further, a handle 57 (see FIG. 2C) is provided on the surface of the lid 52.

  A motor 60 is fixed to the cover 40 via a fixing base 58 and a transmission mechanism 59. The motor 60 is for rotating the stirring means 62 provided in the stirring chamber 30, and its power is transmitted to the rotating shaft 64 of the stirring means 62 by the transmission mechanism 59. Such a transmission mechanism 59 is well known and will not be described in detail. The motor 60 is connected to a control panel 100, which will be described later, through the case inner side 20 by a cable 74 that penetrates the upper surface 12E and the side surface 12C of the case 12, and receives power supply.

  The stirring means 62 includes a rotating shaft 64 and a plurality of blades 66 provided on the outer peripheral surface thereof. The rotation shaft 64 is set to a length that reaches the vicinity of the lower end of the stirring chamber 30 from the transmission mechanism 59. The blades 66 have a substantially spiral shape, and the individual blades 66 are divided in the radial direction by slits 68 formed in the radial direction from the rotating shaft 64. Further, teeth 70 protruding upward are provided at the divided upper end, and teeth 72 protruding downward are provided at the divided lower end. By providing the teeth 70 and 72 protruding in the vertical direction, the stirring effect by the blade 66 can be enhanced.

  Further, an air supply device 82 is connected to the cover 40 via a valve 76 and an air supply hose 80. The air supply device 82 is for sending the contents of the agitation chamber 30 to a later-described injection gun 90 by supplying air into the agitation chamber 30. Note that the start / stop switching of the air supply and the adjustment of the air supply amount are performed by operating the lever 78.

  On the other hand, a discharge hose 87 and a connecting hose 88 are connected to the discharge port 34 at the lower end of the stirring chamber 30 via a valve 84. The discharge hose 87 is used when the contents of the stirring chamber 30 are discarded, and is normally stored in the case inner side 20. The connecting hose 88 is for sending the contents of the agitation chamber 30 to the spray gun 90 and is connected to the spray gun 90 through the case side surface 12A. Note that whether the contents of the stirring chamber 30 are sent to the discharge hose 87 or the connecting hose 88 can be switched by operating a lever 86 provided on the valve 84.

  The spray gun 90 applies the spray (such as the mixture 108 of the zinc-based paint 106 and the solvent 104) sent through the valve 84 and the connecting hose 88 to the object 110 (see FIG. 2C). Various types of well-known injection guns can be applied. In the present embodiment, an air supply device 94 is connected to the injection gun 90 via an air supply hose 92, and the lever 96 is operated to be sent from the air supply device 94 to an air outlet (not shown). The configuration is such that paint is jetted from the jet port 98 using air.

  The control panel 100 is provided on the side surface 12C of the case 12, and a cable 74 of the motor 60 is connected thereto. Further, the control panel 100 is connected to a power source (not shown) via a cable 102 so that the motor 60 can be energized. Note that ON / OFF switching of energization to the motor 60 and adjustment of the rotation speed and the like are performed by operation of switches and the like provided on the control panel 100.

  Next, the operation of this embodiment will be described with reference to FIG. First, as shown in FIG. 2A, with the valve 84 at the bottom of the stirring chamber 30 closed, the lid 52 of the charging unit 44 is opened and a small amount of solvent 104 is charged into the stirring chamber 30. This is to prevent the zinc-based paint 106 from sticking to the valve 84. As the solvent 104, for example, thinner is used. Next, as shown in FIG. 2 (B), the solvent 104 and the zinc-based paint 106 are charged from the charging port 46, the power supply to the motor 60 is turned on by operating the control panel 100, and the stirring means 62 is moved to the arrow F1. Rotate in the direction and start stirring. The input amounts of the solvent 104 and the zinc-based paint 106 may be appropriately determined as necessary.

  When the solvent 104 and the zinc-based paint 106 are sufficiently mixed, as shown in FIG. 2 (C), while continuing stirring, the lower valve 84 is opened to the connection hose 88 side (arrow F3) and stirring is performed. The valve 78 at the top of the chamber 30 is opened, and the supply of air from the air supply device 82 is started (arrow F2). When the supply of air is started, the inlet 46 is sealed with a lid 52, and the mixture 108 of the solvent 104 and the zinc-based paint 106 in the stirring chamber 30 is sealed by the fed air as shown by an arrow F4. It is sent to the spray gun 90 through the valve 84 and the connecting hose 88. On the spray gun 90 side, the mixture 108 sent from the agitation chamber 30 is sprayed onto the surface of the object 110 to be coated, which has been previously blasted using the air from the air supply device 94. . The object 110 is, for example, a large steel member or a steel plate having a large area. In addition, at the time of the first injection, the solvent 104 previously put in the valve 84 is injected. However, since the amount is very small as viewed from the total amount of the zinc-based paint 106 to be applied, and it volatilizes immediately, the coating is performed. It is not necessary to consider the effect on the finish. In order to prevent the solvent 104 and the zinc-based paint 106 from separating and the solvent 104 from volatilizing, the stirring by the stirring means 62 is always performed during the painting operation.

  If the solvent 104 and the zinc-based paint 106 in the stirring chamber 30 are insufficient, they are additionally charged from the charging port 46 as necessary. Basically, it is wasteful if the amount is used up in one operation. Not convenient. When the mixture 108 in the stirring chamber 30 is sprayed to almost the end, the solvent 104 is added to the stirring chamber 30, and the contents remaining in the connecting hose 88 are pushed out. The content to be sprayed at this time may be sprayed on the painted surface as it is, or may be recovered and discarded. When the above-described painting operation is completed, the air supply from the air supply devices 82 and 94 is stopped and the drive of the motor 60 is stopped. Then, as shown in FIG. 2D, the lower valve 84 of the stirring chamber 30 is switched to the discharge hose 87 side, and the residue is discharged (arrow F5). As described above, the zinc layer or coating formed on the surface of the object 110 is usually better as it is thicker. The anticorrosive effect can be sufficiently exhibited. The rust prevention mechanism is based on the same sacrificial anodic action as that of the known hot dip galvanizing, and by applying the zinc-based paint 106 to the object 110 so as to have a dry film thickness of, for example, 76 μm or more, Corrosion resistance and corrosion resistance equivalent to galvanization can be ensured.

Thus, according to the first embodiment, the solvent 104 and the zinc-based paint 106 are constantly stirred in the stirring chamber 30, and the mixture 108 is sent out from the stirring chamber 30 by the force of air and connected to the connecting hose 88. Since the injection gun 90 is used for injection, the following effects are obtained.
(1) Since the solvent 104 and the zinc-based paint 106 are not separated in the stirring chamber 30, and volatilization of the solvent 104 can be suppressed, workability is good.
(2) Since the zinc-based paint 106 is sprayed by the spray gun 90, unevenness is hardly formed, and a relatively uniform painted surface can be formed.
(3) Since it does not require a galvanizing tank, it can be easily installed not only at steel frame manufacturing plants, but also at joint sites.
(4) Since a galvanizing tank is not required and construction is performed at room temperature, there is no restriction on designing, manufacturing, and construction of the object 110.
(5) There is no restriction on the size of the object 110, and it can be applied to large steel materials and specially shaped products.
(6) Easy repair of the zinc layer.
(7) Since the caster 22 is provided in the case 12, the movement is easy.

In addition, this invention is not limited to the Example mentioned above, A various change can be added in the range which does not deviate from the summary of this invention. For example, the following are also included.
(1) The shape and size of each part shown in the above-described embodiment is an example, and can be appropriately changed as necessary.
(2) The apparatus configuration of the above embodiment is also an example, and may be changed as appropriate so as to achieve the same effect.

(3) The stirring means 62 is also an example, and other known stirring means may be applied as long as the same effect is obtained.
(4) The film thickness of the zinc layer to be formed is also an example, and can be appropriately changed according to the object to be coated.

(5) In the above embodiment, the case 12 is movable. However, this is also an example and does not prevent the case 12 from being fixed.
(6) In the above-described embodiment, a large steel part or a steel plate with a large surface area has been described as an example of the object 110 to be painted, but the object to be painted is not limited to a part. Applicable to all steel parts and structures such as thin plate processed products. Furthermore, the zinc coating apparatus of the present invention can be applied not only to the coating of new parts and structures but also to the repair of existing hot dip galvanized products or electrogalvanized products.

  According to the present invention, while stirring the zinc-based paint and the solvent by the stirring means provided in the stirring chamber, the mixture is sent to the spraying means by air and sprayed onto the surface of the object to be coated with zinc (or thru Therefore, it can be applied to a zinc coating apparatus. In particular, since the shape and dimensions of the object are not limited, it is suitable as a device for coating large or specially shaped parts or structures.

It is a perspective view which shows the whole structure of Example 1 of this invention. It is a figure which shows the effect | action of the said Example 1. FIG.

Explanation of symbols

10: Zinc coating device 12: Case 12A-12C: Side surface 12D: Bottom surface 12E: Top surface 14: Door 16: Hinge 18: Handle 20: Inside 22: Caster 30: Stirring chamber 30A: Tube portion 30B: Conical portion 32: Flange 34 : Discharge port 36: Fixed cover 38: Bolt 40: Cover 42: Opening 44: Opening part 46: Insertion port 48: Slope 50: Locking tool 52: Cover 52A: Side surface 52B: Back surface 54: Hook 56: Packing 57: Handle 58 : Fixing stand 59: Transmission mechanism 60: Motor 62: Agitation means 64: Rotating shaft 66: Blade 68: Slit 70, 72: Teeth 74: Cable 76: Valve 78: Lever 80: Air supply hose 82: Air supply device 84: Valve 86: Lever 87: Discharge hose 88: Connection hose 90: Injection gun 92: Air supply hose 94: Air supply device 96: Lever 98 Injection port 100: Control panel 102: cable 104: Solvent 106: zinc based paint 108: Mixture 110: object

Claims (5)

A stirring chamber having a zinc paint and solvent inlet, a mixture outlet, and an air inlet;
A lid or cover that opens and closes the inlet in a sealable manner;
Provided in the stirring chamber, stirring means for stirring the zinc-based paint and solvent;
Drive means for driving the stirring means;
A first air supply means connected to the air supply port of the stirring chamber via a first valve and a first air supply hose, and for sending air to the stirring chamber;
An injection means connected to the discharge port of the stirring chamber via a second valve and a connection case, and for injecting the mixture of the zinc-based paint and the solvent onto the object to be coated;
A zinc coating apparatus characterized by comprising: A discharge hose having one end connected to the discharge port via the second valve and capable of discharging the contents of the stirring chamber to the outside from the other end by switching the second valve;
The zinc coating apparatus according to claim 1, further comprising: The injection means
A gun body with an injection port and an air outlet,
A second air supply hose with one end connected to the gun body;
A second air supply means connected to the other end of the second air supply hose and sending air for injection to the gun body via the second air supply hose;
The zinc coating apparatus according to claim 1 or 2, further comprising: The stirring means is
A rotating shaft rotated by the driving means;
A stirring blade provided on the rotating shaft;
Teeth protruding substantially vertically from the blades,
The zinc coating apparatus according to any one of claims 1 to 3, further comprising: A stirring chamber having a zinc paint and solvent inlet, a mixture outlet, and an air inlet;
A lid or cover that opens and closes the inlet in a sealable manner;
A rotating shaft that rotates inside the stirring chamber; a stirring blade provided on the rotating shaft; and a tooth that is formed to protrude from the blade in a substantially vertical direction. Stirring means for stirring,
Drive means for driving the rotating shaft of the stirring means;
A first air supply means connected to the air supply port of the stirring chamber via a first valve and a first air supply hose, and for sending air to the stirring chamber;
A gun body that is connected to a discharge port of the stirring chamber via a second valve and a connecting hose, and has a spray body and an air outlet, and one end is connected to the gun body. Injection including a supply air hose and second supply means connected to the other end of the second supply hose and sending the injection air to the gun body via the second supply hose means,
A discharge hose having one end connected to the discharge port via the second valve and capable of discharging the contents of the stirring chamber to the outside from the other end by switching the second valve;
A zinc coating apparatus characterized by comprising:

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