JP2012200694A - Coating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating device that can prevent a coating material from scattering and securely coat a coating target part in a short time without causing coating unevenness nor leaving an uncoated part.SOLUTION: The coating device includes a coating material supply part which supplies a pressurized coating material and a jet cover 10 which receives the coating material from the coating material supply part and emits a jet. The jet cover 10 includes an internal cover body 20 for covering the coating target part, an external cover body 21 which is arranged outside the internal cover body 20 to form a circulation path 22 for the coating material with the internal cover body 20, and a plurality of coating material jet parts 40 which are scattered along the circulation path 22 and jet the coating material flowing through the circulation path 22 into a coating space S formed inside the internal cover body 20.

Description

  The present invention relates to a coating apparatus, and more particularly, to a coating apparatus suitable for coating the surface of a nut that fixes a rivet attached to a building structure such as an iron bridge.

  Conventionally, various construction parts are painted in various forms at a construction work site or the like. In particular, when the surfaces of bolts and nuts that fasten the structural parts are painted, painting is performed after the fastening. This is because if the bolts and nuts are pre-painted and then fastened, the paint will peel off when fastened.

  However, several problems arise when painting after fastening. For example, when the paint is sprayed toward the part to be coated by the spray device, the paint may be scattered to an unnecessary part. For this reason, depending on the situation, the operator may carefully apply the paint to the portion to be painted with a brush or the like. However, such manual painting is cumbersome and labor intensive. In particular, when painting with a brush, it is difficult to attach the paint to the surface portion on the ground side of a member to be painted, such as a nut, in a narrow portion close to the ground, resulting in uneven coating and unpainted portions. there is a possibility.

  Therefore, for example, Patent Document 1 and Patent Document 2 propose a coating apparatus provided with a paint scattering prevention cover so that the spraying of the paint can be prevented while allowing the spraying apparatus to perform painting.

JP 2004-243176 A JP 2009-202080 A

  However, in the coating apparatus disclosed in the above-mentioned patent document, even if the scattering of the paint can be prevented, the paint is only sprayed and diffused from a predetermined one spraying portion, so that It is not always possible to paint evenly and uniformly. In particular, it is difficult to uniformly apply a paint to a surface portion of a nut frequently used in a structure such as an iron bridge in a short time, which may cause uneven coating or unpainted.

  The present invention has been made paying attention to the above-mentioned problems, and can prevent paint from being scattered, and can reliably apply a coating target site in a short time without causing uneven coating or unpainted areas. An object is to provide an apparatus.

  In order to achieve the above-described object, a coating apparatus according to the present invention includes a paint supply unit that supplies pressurized paint, and an injection cover that receives and injects paint from the paint supply unit, and the injection cover includes: An inner cover body for covering the portion to be painted, an outer cover body that is disposed outside the inner cover body and forms a flow path for paint between the inner cover body, and dotted along the flow path. And a plurality of paint spraying portions for spraying the paint flowing through the flow passage into a paint space formed inside the inner cover body.

  According to the above configuration, the flow passage for circulating the paint is provided between the outer cover body and the inner cover body constituting the spray cover, and a plurality of paint sprays are scattered along the flow path. Since the part is provided, the paint spraying part can be arranged at an optimum position with respect to the object to be coated, and this makes it possible to spread the paint evenly in the paint space formed by the inner cover body. Become. Therefore, it is possible to reliably perform the coating in a short time without causing uneven coating or unpainted portions on the portion to be coated located in the coating space. Moreover, in the said structure, since a coating object site | part can be covered with an inner side cover body, it can prevent also about scattering of a coating material.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to prevent the scattering of a coating material, the coating apparatus which can perform the coating of the application | coating object site | part reliably in a short time without producing a coating nonuniformity and unpainted residue can be provided.

1 is an overall configuration diagram of a coating apparatus according to an embodiment of the present invention. (A) is sectional drawing of the outer side cover body which comprises the spray cover of the coating device of FIG. 1, (b) is sectional drawing of the inner side cover body which comprises a spray cover. It is sectional drawing of the whole injection | spray cover formed by the inner cover body and the outer cover body being assembled | attached. It is sectional drawing which shows the 1st modification of an ejection cover. (A) is a longitudinal cross-sectional view which shows the 2nd modification of a spray cover, (b) is a cross-sectional view which follows the AA line of (a).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show an embodiment of the present invention. As shown in FIG. 1, the coating apparatus 1 of this embodiment is particularly suitable for coating the surface of a nut 50 that fixes a rivet attached to a building structure S such as an iron bridge, and supplies pressurized paint. A coating material supply unit 30 for receiving the coating material, and an injection cover 10 for receiving the coating material from the coating material supply unit 30 and injecting the coating material.

The paint supply unit 30 includes an operation unit 2 including an operation lever 3 that controls supply of pressurized paint to the spray cover 10, and a supply tube 5 that extends from the operation unit 2 to the spray cover 10. . For example, a reservoir (not shown) with a pressurizing pump for supplying paint in a pressurized state is connected to a base 6 at the base end of the operation unit 2 communicating with the inner flow path of the supply tube 5 via a connection tube (not shown). And are detachably connected. Further, the supply tube 5 is detachably connected to a connection base 13 provided at the paint injection port 12 of the spray cover 10, for example.
Therefore, in such a configuration, when the pressure pump on the reservoir side is driven and the operation lever 3 of the operation unit 2 is gripped, the paint is supplied from the reservoir to the injection port 12 of the spray cover 10 via the supply tube 5. In addition, when the grasping operation force of the operation lever 3 is released, the supply of the paint to the spray cover 10 is stopped.

  As shown in detail in FIG. 3, the spray cover 10 is concentrically disposed on the outer side of the inner cover body 20 and the cylindrical inner cover body 20 for covering the portion to be painted (in the example of FIG. 1, the nut 50). A cylindrical outer cover body 21 is disposed and forms a paint flow path 22 between the inner cover body 20 and the inner cover body 20. In this case, the inner diameter of the outer cover body 21 is set to be larger than the outer diameter of the inner cover body 20, and the inner diameter of the flow passage 22 is defined by the dimensional difference between these diameters. As shown in FIG. 2, the inner cover body 20 has an annular connecting portion 25 having an L-shaped cross section extending radially outward at the outer peripheral edge portion of the opening 20 a, and the annular connecting portion 25. A female screw 29 is formed on the inner peripheral surface of the outer cover body 21, and the female screw 29 is screwed with a male screw 27 formed on the outer peripheral surface of the opening 21 a of the outer cover body 21.

  Therefore, when the inner cover body 20 is concentrically surrounded by the outer cover body 21 so that the outer cover body 21 is covered on the inner cover body 20, and the screws 27 and 29 are screwed together, as shown in FIG. The two covers 20 and 22 are concentrically arranged to form a flow passage 22 between the inner peripheral surface of the outer cover body 21 and the outer peripheral surface of the inner cover body 20, and the annular connection portion 25. The flow path 22 is closed by the bottom wall portion 25a. In this configuration, in order to seal the inside of the flow passage 22 with respect to the outside, it is preferable to insert a seal member such as an O-ring between the screw connection portions of the screws 27 and 29.

  Further, in the spray cover 10 in which the outer cover body 21 and the inner cover body 20 are detachably attached as described above, the paint flowing through the flow passage 22 is formed in the coating space S formed inside the inner cover body 20. A plurality of paint spraying portions 40 are provided for spraying on the surface. In this case, these paint spraying portions 40 are provided in a scattered manner along the flow path 22, and specifically in the present embodiment, are formed by the spray ports 20 b formed in the inner cover body 20. . These injection ports 20b are provided at predetermined intervals on the peripheral side surface 20c and the upper surface 20d of the inner cover body 20 so as to allow the flow passage 22 and the coating space S to communicate with each other.

  The spray port 20b is provided with a spray nozzle (not shown) that sprays the paint flowing in the flow passage 22 in the form of a mist so that the paint is sprayed and spreads over a predetermined range. Is scattered. Further, a plurality of injection ports 20b are installed at predetermined intervals on the peripheral side surface of the inner cover body 20 so that the paint can be uniformly scattered on the surface of the nut covered with the inner cover body 20. In the configuration shown, the upper and lower stages are arranged at predetermined intervals along the circumferential direction). Moreover, in this embodiment, the injection port 20b is arrange | positioned also in the approximate center part of the top plate 20d of the inner side cover body 20 so that a coating material may be scattered not only on the side surface of a nut but on the surface.

  When painting the surface of the nut 50 that fixes the rivet attached to the building structure S such as an iron bridge using the coating apparatus 1 configured as described above, first, the nut 50 to be painted is covered with the inner cover. The opening end face of the spray cover 10 is applied to the surface of the structure S so as to be taken into the painting space S of the body 20 (see the arrow in FIG. 1). In this state, when the pressure pump on the reservoir side described above is driven and the operation lever 3 of the operation unit 2 is gripped, the paint is supplied from the reservoir to the injection port 12 of the injection cover 10 via the supply tube 5. As shown by the arrows in FIG. 3, the paint flows over the entire flow path 22 of the spray cover 10, and the paint is uniformly diffused and sprayed from all the spray units 40 (spout ports 20 b) into the paint space S. Is done.

  As described above, according to the present embodiment, the flow path 22 for circulating the paint is provided between the outer cover body 21 and the inner cover body 20 constituting the spray cover 10. Since the plurality of coating material spraying portions 40 (20b) are provided along the line, the coating material can be distributed evenly in the coating space S formed by the inner cover body 20. Therefore, as shown in FIG. 3, by installing the injection port 20b, the coating object (the nut 50) positioned in the coating space S can be reliably and quickly applied without causing uneven coating or unpainted portions. Can be painted. Moreover, in this embodiment, since the coating target object (nut 50) is covered with the inner side cover body 20, scattering of a coating material can be prevented. Moreover, in this embodiment, since the cover bodies 20 and 21 can be easily attached or detached via the screws 27 and 29, maintenance, such as washing | cleaning of the injection | spray cover 10, can be performed easily.

  FIG. 4 shows a first modification of the spray cover. As shown in the figure, the spray cover 10A of this modification has a conical shape, and the inner cover body 20A and the outer cover body 21A are integrally formed so as not to be detachable. The flow path 22 for the paint formed between the inner cover body 20A and the outer cover body 21A is closed by a connection end wall 43 that connects the cover bodies 20A and 21A. Also in this modified example, the spray portions 40 scattered along the flow path 22 are formed by the spray ports 20b provided in the inner cover body 20A (other configurations are the same as those in the above-described embodiment. ).

Therefore, also in this modified example, the same effect as that of the above-described embodiment can be obtained, and the paint sprayed from the spray unit 40 can be intensively directed to the portion to be coated, The part can be efficiently painted.
The inner cover body 20A and the outer cover body 21A may be configured to be detachable by press-fitting.

  FIG. 5 shows a second modification of the spray cover. As shown in the figure, the spray cover 10B of the present modification has a hexagonal cylindrical body so as to conform to the shape of a hexagon nut, for example, and the inner cover body 20B and the outer cover body 21B are detachably integrated. Is formed. Also in this case, as in the first modification, the flow path 22 for the paint formed between the inner cover body 20B and the outer cover body 21B is a connection end that connects the cover bodies 20B and 21B together. It is closed by a wall 49.

  In the present modification, the ejection units 40 that are scattered along the flow path 22 are each configured by an ejection unit 70 that is detachably attached to the ejection cover 10B. Specifically, in the present modification, the injection unit 70 includes a nozzle-shaped injection port 70a that is directed into the painting space S of the inner cover body 20B, and an inflow port 70b that can communicate with the flow passage 22. These are attached to the attachment screw portions 72 and 75 formed on the cover bodies 20B and 21B by screwing. Other configurations are the same as those of the above-described embodiment.

  Accordingly, also in this modification, the same operational effects as those of the above-described embodiment can be obtained, and the injection unit 70 can be replaced as necessary, so that maintenance can be easily performed and the viscosity of the paint is matched. Spraying can be performed.

  Note that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, the shape of the above-described spray cover is not limited to a cylindrical shape or a conical shape, and can take various shapes. Also, the attachment / detachment structure between the covers is not limited to screws, and various forms such as press-fitting, clamping, and elastic locking can be employed. Furthermore, the form of the injection part is also arbitrary, and any form may be used as long as the paint flowing in the flow passage 22 can be injected into the painting space of the inner cover body.

DESCRIPTION OF SYMBOLS 1 Coating apparatus 10 Spray cover 20,20A, 20B Inner cover body 20b Outlet port 21,21A, 21B Outer cover body 22 Flow path 30 Paint supply part 40 Spray part 70 Spray unit S Paint space

Claims (5)

A paint supply section for supplying pressurized paint;
An injection cover for receiving and injecting paint from the paint supply unit;
With
The spray cover is
An inner cover for covering the part to be painted;
An outer cover body which is disposed outside the inner cover body and forms a flow path for paint between the inner cover body;
A plurality of paint spraying portions that are provided along the flow path and spray the paint flowing through the flow path into a paint space formed inside the inner cover body;
The coating apparatus characterized by having.   The coating apparatus according to claim 1, wherein the paint spraying unit includes a spray port formed in the inner cover body.   The coating apparatus according to claim 1, wherein the paint spraying unit includes a spraying unit that is detachably attached to the spraying cover.   The coating apparatus according to any one of claims 1 to 3, wherein the inner cover body and the outer cover body are detachably attached to each other.   The coating apparatus according to claim 1, wherein the spray cover has a cylindrical shape, a conical shape, or a hexagonal shape.

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