JPH04300666A - Intermediate storage tank for electrostatic painting apparatus and holding apparatus thereof - Google Patents

Abstract

PURPOSE:To effectively contract the space in which various machineries are arranged and to obtain excellent electric insulating properties. CONSTITUTION:An intermediate storage tank is equipped with a manifold base stand having a pipe body connection body 20 to which a plurality of pipe bodies can be arranged from the outside and formed of an electric insulating material, the storage part 24 integrally provided to the manifold base stand and once storing conductive paint, an insulating mechanism 30 having the three-way change-over valves 26, 28 spaced apart from each other so as to ensure a predetermined distance through an insulating pipe 40 and arranged along the storage part 24 and the cover members 32a, 32b made of an electric insulating material covering the machineries containing the aforementioned insulating mechanism 30 to be mounted on the manifol base stand 22.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermediate storage tank and its holding device used in a coating device that performs electrostatic coating by directly applying a high voltage to conductive paint.

0002

2. Description of the Related Art Conventionally, a voltage block method, for example, has been known as a method for applying electrostatic coating to an object to be coated, such as an automobile body, by directly applying a high voltage to a conductive paint. In this method, the conductive paint is introduced into an intermediate reservoir insulated from ground potential, and then from this intermediate reservoir is supplied through a paint path to a paint gun at a high potential. Electrostatic painting work is being carried out on painted objects.

[0003] In this case, since a high voltage is applied to the conductive paint, it is necessary to effectively prevent electrical leakage from various devices and short circuits due to proximity of conductors.

[0004] Specifically, a block valve mechanism disposed between a paint supply source and an intermediate storage tank, this intermediate storage tank, and a conductive paint led out from the intermediate storage tank to a coating gun. In order to reliably insulate the high voltage applied to the conductive paint, the discharge rate control valves, etc. that control the discharge rate of the conductive paint are arranged on a flat surface, separated from each other by the necessary distance. There is.

[0005]

[Problems to be Solved by the Invention] However, in the above-mentioned prior art, equipment such as the block valve mechanism, intermediate storage tank, and discharge amount control valve are separated by a distance that allows them to be insulated from each other. There is a problem in that the installation space is considerably expanded. Moreover, since the various devices are exposed to the outside, there is a high risk that a short circuit will occur if, for example, a robot arm approaches the devices.

The present invention solves this type of problem, and provides an intermediate storage tank for electrostatic coating equipment that can effectively reduce the space in which various equipment is arranged and has excellent electrical insulation properties. and a holding device thereof.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a manifold base which has a pipe connection part to which a plurality of pipes can be connected from the outside and is made of an electrically insulating material. a storage section that is integrally provided with the manifold base and in which conductive paint is temporarily stored; an insulation mechanism that electrically insulates between the paint supply source and the storage section; and a device that includes the insulation mechanism. and a cover member made of an electrically insulating material that is attached to the manifold base so as to cover the manifold base.

Furthermore, the present invention provides a bolt member provided on the outer wall of the intermediate storage tank according to claim 1, a frame body having a shape corresponding to the external shape of the intermediate storage tank, and a bolt member provided on the outer wall of the intermediate storage tank; and a groove portion for engaging the bolt member and holding the intermediate storage tank.

[0009]

[Operation] In the intermediate storage tank for an electrostatic coating device according to the present invention, the conductive paint supply pipe, the drive air pipe, and the pipe connection portion provided on the manifold base made of an electrically insulating material A cleaning liquid pipe and the like are installed, and a storage section and equipment such as an insulating mechanism provided on this manifold base are covered with a cover member made of an electrically insulating material. For this reason,
Various devices can be arranged compactly while ensuring electrical insulation, and the space for accommodating the devices can be used effectively.

Further, in the intermediate storage tank holding device according to the present invention, the bolt member provided on the outer wall of the intermediate storage tank is engaged with the frame body to hold the intermediate storage tank. The intermediate storage tanks can be arranged in an upright position, and space saving is easily achieved.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the intermediate storage tank for electrostatic coating equipment and its holding device according to the present invention will be described below with reference to the accompanying drawings.

In FIG. 2, reference numeral 10 indicates an electrostatic coating device, and this electrostatic coating device 10 includes an intermediate storage tank 12 according to the present embodiment connected to a color change valve mechanism (not shown), etc. A coating gun 16 is connected to this intermediate storage tank 12 via a four-way switching valve 14, and is fixed in an upright position by a holding device 18.

As shown in FIG. 1, the intermediate storage tank 12 includes a manifold base 22 made of an electrically insulating material, and a manifold base 22 having a pipe connection part 20 to which a plurality of pipes can be connected from the outside. A storage section 24 that is provided integrally with the stand 22 and temporarily stores the conductive paint, and a set of three-way switching valves that are spaced apart from each other by a predetermined distance and arranged along the storage section 24. Insulation mechanism 30 having 26, 28
and a cover member 3 made of an electrically insulating material that is attached to the manifold base 22 to cover the equipment including the insulating mechanism 30.
2a and 32b.

In this manifold base 22, in addition to the tube connection portion 20 described later, an outer wall portion 34 of the storage portion 24 and equipment mounting portions 36a to 36d are integrally molded. Cover members 32 are provided at both ends of 20.
Threaded portions 38a and 38b are formed for fixing parts a and 32b. Three-way switching valves 26 and 28 constituting the insulation mechanism 30 are fixed to the equipment mounting parts 36a and 36b, and an insulating pipe 40 having a length capable of insulating a predetermined high voltage between the three-way switching valves 26 and 28 is placed.

The storage section 24 includes a first cylinder chamber 44 for injecting paint and cleaning liquid and a second cylinder chamber 46 for supplying air, which are separated by a piston 42 . A cylindrical detection rod 48 extending in the direction
A tank 50 for storing cleaning fluid is provided above the detection rod 48. A dog member 52 is fixed to a predetermined position of the detection rod 48 , and a dog portion 53 is formed in the tank 50 , and the dog member 52 and the dog portion 53 engage with the detection means 54 .

The detection means 54 includes on-off valves 56a and 56b which are engaged with the dog member 52 and the dog portion 53 to be switched and driven.
The on-off valves 56a and 56b are fixed to the equipment mounting portion 36c of the manifold base 22 via a mounting member 58. Equipment mounting portion 3 of this manifold base 22
A flow control valve 60 that communicates with the first cylinder chamber 44 of the storage section 24 and adjusts the amount of paint discharged is fixed to 6d.

The flow path system of this intermediate storage tank 12 will be explained below with reference to FIG.

The pipe connection portion 20 formed at the end of the manifold base 22 has a paint inlet 62 and a cleaning liquid inlet 6.
4 are provided in close proximity to each other, and this paint inlet 62,
The cleaning liquid inlet 64 communicates with each port of the three-way switching valve 26. The three-way switching valve 28 that communicates with the three-way switching valve 26 via the insulating pipe 40 has a cleaning liquid outlet 66 that opens at the pipe connection part 20 and a paint flow path that opens into the first cylinder chamber 44 of the storage section 24. 68. A paint flow path 70 communicates with this first cylinder chamber 44 via a flow rate control valve 60, and this paint flow path 70
communicates with a paint outlet 72 that opens at the tube connector 20 .

A piston 42 is attached to the pipe body connecting portion 20 as a first piston 42.
First drive air port 7 for displacement toward the cylinder chamber 44 side
4, and second to fourth drive air ports 76 to 80 for driving the three-way switching valves 26, 28 and the flow rate control valve 60 are formed. This pipe connection portion 20 includes an on-off valve 5.
Air introduction ports 82a, 82b and air outlet ports 84a, 84b are provided for introducing and ejecting air for detection into 6a, 56b.

[0020] This intermediate storage tank 12 has an insulating structure in order to maintain insulation between devices and the outside when high voltage is directly applied to the conductive paint. Specifically, the manifold base 22 and the cover members 32a, 32
A creepage distance L is ensured at the connection portion with b to enable effective insulation when the high voltage is applied.

The holding device 18 includes bolt members 86a and 86b provided on the outer wall of the intermediate storage tank 12, a frame 88 having a shape corresponding to the external shape of the intermediate storage tank 12, and a frame 88 that provided, the bolt members 86a, 8
This frame body 88 includes grooves 90a and 90b for holding the intermediate storage tank 12 in an upright position by engaging the intermediate storage tank 6b.
It is fixed to a wall (not shown) in the workplace.

Next, the intermediate storage tank 1 constructed as described above
The operation of No. 2 will be explained in relation to the electrostatic coating device 10.

First, the paint inlet 62 is connected to the color change valve mechanism, the cleaning liquid inlet 64 is connected to the cleaning valve, and
A cleaning liquid outlet 66 is connected to a waste liquid tank. Paint outlet 7
2 communicates with the coating gun 16 via the four-way switching valve 14, while the first to fourth drive air ports 74 to 80 are connected to an air supply source. Further, the air inlet 82a and the air outlet 84a, and the air inlet 82b and the air outlet 8
4b are respectively connected to the detection section.

Therefore, during electrostatic painting by the electrostatic painting device 10, when paint of a predetermined color is fed under pressure from the color change valve mechanism to the paint introduction port 62, this paint is transferred from the three-way switching valve 26 to the insulating tube 40. The paint is supplied to the three-way switching valve 28 and filled into the first cylinder chamber 44 of the storage section 24 from the paint flow path 68. The paint filled in the first cylinder chamber 44 is sent from the paint flow path 70 to the four-way switching valve 14 via the paint outlet 72, and then is filled up to the paint gun 16. At that time, the piston 42 rises, the dog member 52 engages with the on-off valve 56a, and the filling of paint can be automatically detected via the detection means 54.

Next, driving air is supplied from the air supply source to the second and third driving air ports 76 and 78, and the three-way switching valves 26 and 28 forming the insulation mechanism 30 are switched. Therefore, the cleaning liquid supplied from the cleaning valve passes through the cleaning liquid inlet 64, the three-way switching valve 26, the insulating pipe 40, and the three-way switching valve 28, and is discharged to the waste liquid tank via the cleaning liquid outlet 66. Then, the insulation mechanism 30 is dried, thereby electrically insulating the color change valve mechanism and the intermediate storage tank 12.

Here, the first driving air port 7 is connected from the air supply source.
Driving air is supplied to the piston 4, the piston 42 is displaced toward the first cylinder chamber 44, and the discharge amount of the paint is adjusted by the flow rate control valve 60, and the paint is delivered to the paint gun with a high voltage directly applied. 16 to a workpiece (not shown). At that time, the piston 42 moves to the first cylinder chamber 44 side, the dog part 53 engages with the on-off valve 56b, and the detection means 54
Movement information of the piston 42 is automatically detected.

In this case, in this embodiment, a tube connecting portion 20 is provided at the end of the manifold base 22, and a predetermined tube is connected to the tube connecting portion 20, so that the manifold base 22 can be connected to the tube connecting portion 20. Various fixed equipment, namely three-way switching valves 26, 28, flow control valve 60, on-off valve 56
a, 56b and the piston 42 can be supplied with a desired fluid. This provides the effect that piping work for various devices can be easily accomplished.

Furthermore, the equipment mounting parts 36a to 36d are integrally molded to the manifold base 22 formed of an electrically insulating material, and the equipment mounting parts 36a to 36
Various devices such as three-way switching valves 26, 28, flow rate control valve 60, and on/off valves 56a, 56b are fixed to d, and these devices are attached to cover members 32a, 32b made of electrically insulating material screwed into manifold base 22. covered. Moreover,
The length and creepage distance L of the insulating tube 40 are selected to be such that insulation can be effectively ensured when high voltage is applied. For this reason,
The various devices are reliably insulated from each other and the outside from the outside, and the devices can be housed compactly, and the intermediate storage tanks 12 can be disposed close to each other. Furthermore, by removing the cover members 32a and 32b from the manifold base 22, maintenance work for various devices is simplified at once.

Furthermore, by using the holding device 18 according to this embodiment, the intermediate storage tank 12 is reliably held in an upright position. For this reason, there is an effect that it becomes possible to make the interval between the plurality of intermediate storage tanks 12 as narrow as possible.

Note that the insulating tube 40 constituting the insulating mechanism 30
It is also possible to connect an actuator such as a cylinder to the insulating tube 40 and remove the insulating tube 40 from the three-way switching valve 28 by an insulating length after the paint is filled.

[0031]

Effects of the Invention According to the intermediate storage tank for an electrostatic coating device according to the present invention, the following effects can be obtained.

A conductive paint supply pipe, a drive air pipe, a cleaning liquid pipe, etc. are connected to the pipe connection portion provided on the manifold base made of electrically insulating material, and the manifold base is Since the storage section and equipment such as the insulation mechanism are covered by a cover member made of electrically insulating material,
Various types of equipment are arranged compactly while ensuring electrical insulation, and the space in which they are placed can be used effectively.

Furthermore, in the intermediate storage tank holding device according to the present invention, the bolt member provided on the outer wall of the intermediate storage tank is engaged with the frame body to hold the intermediate storage tank, so that, in particular, a plurality of intermediate storage tanks can be held. The intermediate storage tanks can be arranged close to each other in an upright position, and the efficiency of the arrangement space of the intermediate storage tanks can be easily achieved.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of an intermediate storage tank for an electrostatic coating device according to the present invention.

FIG. 2 is a schematic perspective view of an electrostatic coating device and a holding device incorporating the intermediate storage tank.

FIG. 3 is an explanatory diagram of a flow path system of the intermediate storage tank.

[Explanation of symbols]

10...Electrostatic coating device 12...Intermediate storage tank 16...painting gun 18... Holding device 20...Pipe connection part 22...Manifold base 24...Storage part 26, 28...Three-way switching valve 30...Insulation mechanism 32a, 32b...Cover member 36a to 36d...Equipment mounting part 40...Insulating tube 42...Piston 44, 46...Cylinder chamber 48...Detection rod 54...Detection means 56a, 56b...Opening/closing valve 60...Flow control valve 70...Paint flow path

Claims (4)

[Claims] Claims 1. A manifold base having a pipe connection part to which a plurality of pipes can be connected from the outside, and made of an electrically insulating material; and a manifold base integrally provided with the manifold base and coated with a conductive paint. A storage section in which paint is once stored, an insulation mechanism that electrically insulates between the paint supply source and the storage section, and a cover made of an electrically insulating material that covers the equipment including the insulation mechanism and is attached to the manifold base. An intermediate storage tank for an electrostatic coating device, characterized by comprising: 2. In the intermediate storage tank according to claim 1, a discharge amount control device is provided at an end of the storage portion to control the amount of conductive paint discharged when the conductive paint in the storage portion is supplied to the coating gun. An intermediate storage tank for an electrostatic coating device, characterized in that a valve is arranged. 3. The intermediate storage tank according to claim 1, wherein a detection rod is provided on a piston that is disposed in a movable manner within the storage section and extends outward from the storage section; 1. An intermediate storage tank for an electrostatic coating device, comprising: a detection means incorporating a valve for obtaining position information of a piston. 4. A bolt member provided on an outer wall of the intermediate storage tank according to claim 1; a frame body having a shape corresponding to the external shape of the intermediate storage tank; 1. A holding device for an intermediate storage tank, comprising: a groove portion for holding the intermediate storage tank by engaging members.