JPH08266954A - Work charging type electrostatic painting apparatus - Google Patents

Abstract

PURPOSE: To apply high voltage to a work without generating a spark and to individually control the high voltage applied to the work at every truck. CONSTITUTION: A power supply device 9 receiving electromagnetic waves in a non-contact state to output low voltage and a high voltage generator 10 boosting the output voltage of the power supply device 9 to apply high voltage to the work W are provided to each of respective trucks T1 -Tn . An optical communication control device 13 performing the transmission and reception of an optical signal between a main control device C and the control device 13 and a high voltage control device 14 controlling the high voltage generator 10 on the basis of the data of the control device 13 are mounted on each of the trucks. A plurality of wide visual field type optical signal transmitter- receivers Q1 -Qm connected to the main control device C are arranged within a painting booth at a predetermined interval so as to cover the entire painting zone by the communication areas A1 -An thereof. Wide visual field type optical signal transmitter-receivers (P1 -Pn ) performing the transmission and reception of an optical signal along with the optical signal transmitter-receivers Q1 -Qm are respectively connected to the optical communication control devices 13 mounted on the trucks T1 -Tn .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work electrification type electrostatic coating device used for electrostatic coating by applying a high voltage to a work without applying a high voltage to a coating machine.

[0002]

2. Description of the Related Art For example, in the case of electrostatically painting a work such as an automobile body, an electrostatic coating machine for spraying the paint is used in the -80
A high voltage of 120 kV was applied, and the work placed on the conveyor cart was grounded and painted. In this case, electrostatic coating will be performed using insulating paint, but recently the global environmental conservation movement has been increasing, and there are calls for regulations on the use of organic solvents that generate pollutants such as hydrocarbons. In response to this, it is also recommended in the coating industry that the use of insulating paints that consume a large amount of harmful organic solvents such as thinner should be stopped, and the electrostatic coating using non-polluting water-based paints should be started. ing.

However, in the case of electrostatic coating with a conductive coating such as a water-based coating, it is necessary to take an insulating measure in the coating supply system so that the high voltage applied to the coating machine does not leak (Japanese Patent Publication No. S55-55). -114366, 56-141869.
In the coating equipment for automobile bodies, in which paints of dozens of colors are color-changed for multicolor painting, it is necessary to insulate the paint supply pipes and paint tanks for each color. It was troublesome. Furthermore, it is necessary to take safety measures such as surrounding the paint supply pipes and paint tanks with a protective chamber in the paint supply system to which a high voltage is applied, resulting in significant increase in insulation measures and safety measures costs. There was a problem that the entire facility would also become large.

Therefore, the applicant of the present invention can apply a high voltage to a coating machine or electrostatically coat a work with a water-based coating without applying insulation measures to the coating supply system. A work electrification type electrostatic coating device for applying a voltage has been proposed (see Japanese Utility Model Laid-Open Nos. 3-105948 and 4-16796). This is only while the work is passing through a predetermined high voltage application area in the coating zone, for example, the electrode attachment for mounting the work is attached to the slats traveling in the coating zone via the insulating columns. The contactor connected to the electrode attachment slides on the current collecting rail and a high voltage is applied to the work, so an electrostatic field is formed between the contactor and the grounded coating machine, and the high voltage is applied to the coating machine. Electrostatic coating can be performed without application.

[0005]

However, since a high voltage is constantly supplied to the current collecting rail, the squeak occurs not only when the contactor comes into contact with the current collecting rail and when the contactor leaves the current collecting rail, but also during sliding contact. Is likely to occur, and the heat melts the surface of the current collecting rail and the attachment to form irregularities, so that these must be replaced frequently, which increases the maintenance cost.

There is also a demand to individually control the high voltage applied to the work placed on each trolley. For example, the value of the high voltage to be applied is variably controlled according to the type of the work, the timing of starting the conduction of the high voltage and the timing of shutting off the high voltage are adjusted, and further, an overcurrent flows to the work or a predetermined voltage value. When the value is exceeded, it is necessary to detect the abnormality, sound an alarm, and stop the conveyor in some cases. Therefore, according to the present invention, a high voltage can be applied to the work without causing a spark, and at the same time, the high voltage applied to the work can be individually controlled for each trolley to reliably detect an abnormality. This is a technical issue.

[0007]

In order to solve this problem, the invention of claim 1 applies a high voltage to a work placed on a carriage and conveyed, and connects the coating machine to the ground side. In a work-type electrostatic coating device for painting, a main control device that receives a high-voltage control signal to each of the trolleys and receives an abnormality detection signal from each of the trolleys is installed. , A power supply device that receives the electromagnetic waves transmitted from the electromagnetic wave transmission means arranged in the coating booth in a contactless manner and outputs a low voltage, and boosts the voltage output from the power supply device to a predetermined voltage to the truck. A high voltage generator that applies a high voltage to a work through an attachment attached in an insulated state, an optical communication control device that transmits and receives an optical signal between the main control device, and a high voltage control for the self When a signal is received A high voltage controller for controlling the high voltage generator based on the data is installed, and in the coating booth, a plurality of wide-field type optical signal transmitters / receivers connected to the main controller are provided in the coating zone in the communication area. The optical communication control device, which is installed at a predetermined interval so as to cover the entire area and is mounted on the trolley, is a wide-field optical device that transmits and receives an optical signal to and from the optical signal transmitter / receiver connected to the main control device. The signal transmitters and receivers are connected to each other.

According to a second aspect of the present invention, a trolley for placing and transporting a work is supported by left and right guide rails arranged along an endless track having a forward path formed on the floor and a return path formed under the floor. It is formed by a flexible joint that runs while being
A conveyor is formed by endlessly connecting the carriages at a predetermined interval, and a main control device that transmits a high voltage control signal to each of the carriages and receives an abnormality detection signal from each of the carriages is installed, Each cart has a power supply device that receives electromagnetic waves transmitted from the electromagnetic wave transmission means arranged in the coating booth in a contactless manner and outputs a low voltage, and boosts the voltage output from the power supply device to a predetermined voltage. A high voltage generator for applying a high voltage to a work through an attachment attached to the carriage in an insulated state, and a high voltage controller for controlling the high voltage generator based on the data of the high voltage control signal Is mounted, and each high voltage controller is connected to the optical communication controller attached to the conveyor via a communication cable, and is connected to the main controller in the coating booth. One or more wide-field optical transmitters / receivers are installed, and the optical communication controller is provided with a plurality of optical transmitters / receivers that exchange optical signals with the optical signal transmitter / receiver connected to the main controller. Wide-field type optical signal transceiver is connected,
The optical signal transmitter / receiver is characterized in that one or more of the optical signal transmitter / receiver is always attached to the conveyor at predetermined intervals so that the optical signal transmitter / receiver travels in one of the communication areas of the optical signal transmitter / receiver connected to the main controller. To do.

[0009]

According to the first and second aspects of the present invention, since the electromagnetic wave transmitted from the electromagnetic wave transmitting means arranged in the coating booth is received in a non-contact manner and a low voltage is output from the power supply device, a high voltage is output. It is possible to obtain a low-voltage power supply without sliding the contactor on the collector rail to which the power is supplied. Next, the voltage output from the power supply device is boosted by the high voltage generator mounted on each trolley, and applied to each work through the attachment. Therefore, no spark is generated when a high voltage is applied to the work.

In particular, according to the invention of claim 1, the entire coating zone is covered by the communication areas of a plurality of wide-field type optical signal transmitters / receivers connected to the main controller, and each of the carriages has the above-mentioned structure. Since a wide-field type optical signal transmitter / receiver for exchanging optical signals with the optical transmitter / receiver is connected,
While the truck is passing through the coating zone, optical signals are transmitted and received between the main control unit and the optical communication control unit mounted on each truck to ensure that the high voltage control signal transmitted from the main control unit is transmitted. When received by the optical communication control device of each truck, each high voltage control device controls the high voltage generator based on the data when receiving the high voltage control signal addressed to itself. Further, when there is an abnormality in the high voltage generator or the like, an abnormality detection signal is output from the high voltage control device and transmitted to the main control device via the optical communication control device.

According to the second aspect of the invention, the high voltage control signal transmitted from the main control device is an optical signal traveling in the communication area of the optical transceiver connected to the main control device. It is received by the optical communication control device attached to the conveyor via the transceiver, this is transmitted to the high voltage control device of each truck via the communication cable, and for the high voltage control addressed to the high voltage control device of each truck. When a signal is input,
The high voltage generator is controlled based on the data. Further, the abnormality detection signal from each trolley is transmitted to the optical communication control device via the communication cable, and then transmitted to the main control device via the optical signal transmitter / receiver in the communication state. In this case, a plurality of optical transceivers are connected to the optical communication control device attached to the conveyor body, and one of the optical transceivers is always connected to the main control device. Since the vehicle is running in the communication area, the communication state with the main controller is maintained regardless of the position of the carriage.

[0012]

Embodiment 1 The present invention will be described in detail below with reference to the drawings and embodiments. FIG. 1 is a flow sheet showing a work electrification type electrostatic coating apparatus according to the present invention, FIG. 2 is an overall view thereof,
3 is a front view showing a main part, FIG. 4 is a side view thereof, and FIG. 5 is a plan view thereof.

In FIG. 1, reference numeral 1 denotes an endless track in which a forward path from a transport start position S to a transport end position G through a coating zone Z is formed on the upper side of the floor and a return path is formed on the lower side of the floor. It is a conveyor, and guide rails 2R and 2L are laid on both left and right sides of the endless track.
The conveyor 1 has a plurality of carriages T _{1 to} T traveling along left and right guide rails 2R and 2L arranged along endless tracks in which a forward path is formed on the floor and a return path is formed below the floor.
n is connected endlessly at a predetermined interval, and each truck T
_{1 to} Tn are formed by flexible joints in which slats 5, 5 ... Are bridged between the left and right chains 4R, 4L having rollers 3, 3 ... Running on the guide rails 2R, 2L. .

In the coating zone Z, a coating machine 6 connected to the ground side is arranged, and a dielectric cable (electromagnetic wave transmitting means) 7 for outputting electromagnetic waves is laid on the back side of the conveyor 1. There is. Then, an induced electromotive force is generated in each of the carriages T _{1 to} Tn through a pickup coil 8 arranged so as to face the dielectric cable 7 in a non-contact manner while traveling in the coating zone Z, and this is caused to be predetermined. Power supply device 9 for maintaining and outputting the voltage and a high voltage generator 10 for boosting the voltage output from the power supply device 9 to a predetermined voltage, and the upper end of an insulating support column 11 erected on the slat 5. Work W via attachment 12 attached to
It is designed to apply a high voltage to.

Further, each carriage T₁~ Tn is the main control unit
Optical communication control device 13 for transmitting and receiving optical signals to and from device C
When the high voltage control signal addressed to itself is received,
High voltage control for controlling the high voltage generator 10 based on the data
The device 14 is mounted, and the optical communication control device 13 has a main control unit.
A plurality of wide-field optical signal transmitters / receivers Q connected to the device C ₁
~ Wide-field type optical signal transmission / reception for exchanging optical signals with Qm
Receiver P₁To Pn are connected to each other. In addition, each optical signal
Transceiver P₁~ Pn, Q₁~ Qm is a large number of light emitting and receiving elements
The optical signals can be transmitted and received at a wide angle by arranging the
The hood 15 is arranged on the front side of the hood 15.
Is attached, and when the paint adheres to the
You can maintain proper communication status simply by replacing the card 15.
It has been done.

Further, the high voltage control device 14 includes a power supply device 9
From the high voltage generator 10
Monitor the high voltage value and the current value flowing in the work W,
When an abnormality is detected in each value, the optical communication control device 13
Connected optical signal transmitter / receiver P ₁To Pn to main controller C
Optical signal transmitter / receiver Q connected to₁Abnormality detection for ~ Qm
It is adapted to transmit a signal.

[0017] The main control unit C, the relative each truck T ₁ to Tn, and timing data for off the high voltage generator 10 at a predetermined timing, to increase or decrease the voltage value according to the type of the workpiece W A high voltage control signal having various data such as voltage value data is transmitted, and an abnormality detection signal from each of the trucks T _{1 to} Tn is received, and is installed, for example, in a control room outside a coating booth. Has been done. In addition, the plurality of optical signal transmitters / receivers Q _{1 to} Qm connected to the main controller C have communication areas A _{1 to} Am.
Truck T ₁ ~Tn but to cover the painted zone Z entire
Are installed at predetermined intervals along the traveling direction of the vehicle so as not to form a blind spot due to the shadow of the coating equipment arranged in the coating booth. For example, the lights attached to the carriages T _{1 to} Tn are installed. The signal transmitters / receivers P _{1 to} Pn are disposed at substantially the same height as the signal transmitters / receivers P _{1 to} Pn, and are attached to the side wall of the coating booth or the side surface of the coating machine.

The above is an example of the configuration of the present invention, and its operation will be described below. First, when the conveyor 1 is activated, each of the carriages T _{1 to} Tn travels endlessly along the guide rails 2R and 2L, sequentially advances from the underfloor to the floor, and the work W is placed to move from the transport start position S to the coating zone Z. When the work W has passed and traveled to the transfer end position G, and the work W is lowered at the transfer end position G, the work W is withdrawn under the floor and returned to the transfer start position S.

During this period, the high voltage output from the main controller C is output.
The pressure control signal is an optical signal transmitter / receiver Q. ₁~ Qm by Qm
It is converted into a number and transmitted to the entire coating zone Z. Soshi
Trolley T₁~ Tn moves onto the floor and puts the work W on it
Upon entering the mounting zone Z, the pickup coil 8 is moved to the dielectric case.
Induced electromotive force caused by the contact with the bull 7 without contact
Is supplied to the power supply device 9 and the optical signal transmitter / receiver P₁
~ Pn is an optical signal transmitter / receiver Q connected to the main controller C₁
~ Qm communication area A₁~ Enter Am and enter the truck T₁
~ Tn optical communication controller 13 and main controller C communicate with each other.
It becomes a state.

From the main control unit C, timing data for turning on / off the high voltage generator 10 of each trolley at a predetermined timing for all the trolleys T _{1 to} Tn traveling in the coating zone, the work W. A high voltage control signal including data for instructing the value of the high voltage to be applied according to the type is transmitted. Since the coating zone Z is covered by the communication areas A _{1 to} Am of the optical signal transmitters / receivers Q _{1 to} Qm, while the trucks T _{1 to} Tn are traveling in the coating zone Z, the light of each truck is transmitted. The optical communication between the communication control device 13 and the main control device C is not interrupted.

Optical signal transmitters / receivers P ₁ to T _{1 of} each carriage T _{1 to} Tn
The high-voltage control signal received by Pn is photoelectrically converted and input to the optical communication control device 13. When the high-voltage control signal addressed to itself is input, first, the high-voltage generator is based on the data. The high voltage generator 10 is turned on at a predetermined timing while the voltage value generated at 10 is designated, and a high voltage having a predetermined value is applied to the work W via the attachment 12.

At this time, since a low voltage is supplied to each of the carriages T _{1 to} Tn by the power supply device 9 through the pickup coil 8 in a non-contact manner, no spark due to the contact with the power supply rail is generated. . Then, coating is performed while the work W is being conveyed in this state, and after the coating is completed, the high voltage generator 10 is turned off based on the data of the high voltage control signal.

During this time, if an overcurrent flows through the work W or the applied voltage value rises or falls abnormally,
The abnormality is detected by the high voltage controller 14, and the optical communication controller 13 causes the optical signal transmitters / receivers P _{1 to} Pn and Q _{1 to} Qm.
An abnormality detection signal is transmitted to main controller C via. Upon receiving the abnormality detection signal, main controller C performs processing such as sounding an alarm, stopping conveyor 1 in an emergency, or stopping coating depending on the degree of abnormality.

In this way, the high voltage generator 10 mounted on each of the trucks T _{1 to} Tn being painted on the floor is controlled by the main controller C, and the trucks T _{1 to} Tn are controlled.
Even when different types of works W are conveyed, high voltages can be applied at arbitrary timings and their voltage values can be individually controlled. Electrostatic coating can be performed under optimal conditions. In addition, since signals are exchanged between the main control device C and the optical communication control device 13 by optical communication, unlike the wireless communication using radio waves, a high voltage is applied to the work W in the coating booth. However, it rarely malfunctions under the influence of noise.

In the description of the first embodiment, the trolley T ₁
~ Tn are connected endlessly, and each truck T ₁ ~ along an endless track in which the outward path travels on the floor and the return path travels under the floor.
Although the case where Tn is made to travel integrally has been described, in the present invention, both the forward and backward paths are formed on the floor, and the individual carts T ₁ are formed.
It may be a case in which ~ Tn are run separately.

[0026]

[Embodiment 2] FIG. 6 is a flow chart showing another electrostatic charging apparatus for applying electric power to a work according to the present invention, and FIGS. 7A to 7C are explanatory views showing its operation. The same parts as those in FIGS. 1 to 5 are designated by the same reference numerals and detailed invention is omitted.

In this example, a pickup coil 8, a power supply device 9, a high voltage generator 10 and a high voltage control device 14 are mounted for each of the carriages T _{1 to} Tn, and an optical signal is transmitted to and from the main control device C. The optical communication control device 20 that transmits and receives data is transmitted to each carriage T ₁
~ Not provided for each Tn, but for each dolly T ₁ ~
The optical communication control device 20 mounted on the conveyor 1 in which Tn is connected endlessly, and the high voltage control device 14 mounted on each of the carriages T _{1 to} Tn are connected via a communication cable 21. Although illustration is omitted, the optical communication control device 2
0 is connected to the power supply device 9 mounted on each of the carriages T _{1 to} Tn, and the power supply device 9 of the carriage passing through the coating zone Z.
It is designed to receive power from.

Further, in the coating booth, four wide-field optical signal transmitters / receivers Q _{1 to} Q connected to the main controller C are provided.
₄ are arranged before and after the coating zone Z so as to cover a range of 1/4 of the transport distance from the transport start position S to the transport end position G of the conveyor 1 in the communication areas A _{1 to} A ₄ . Further, the optical communication control device 20 mounted on the conveyor 1 has four wide-field type devices for transmitting and receiving optical signals to and from the optical signal transmitters / receivers Q _{1 to} Q ₄ connected to the main control device C. The optical signal transceivers P _{1 to} P ₄ are connected, and one of the optical signal transceivers P _{1 to} P ₄ is always one of the optical signal transceivers Q _{1 to} Q ₄ connected to the main controller C. Are attached to the conveyor 1 at equal intervals so as to travel in any one of the communication areas A _{1 to} A ₄ .

Here, when the conveyor 1 is activated, the carriages T _{1 to} Tn travel endlessly along the guide rails 2R and 2L, sequentially advance from the underfloor to the floor, and put the work W on it from the transport start position S. When the workpiece W is passed through the coating zone Z to the transport end position G, and the work W is lowered at the transport end position G, the workpiece W is exited to the underfloor and returned to the transport start position S. During this time, the high output from the main controller C is output. The voltage control signal is converted into an optical signal by the optical signal transmitters / receivers Q _{1 to} Q ₄ and transmitted to the range of the communication areas A _{1 to} A ₄ .

In this example, four optical signal transmitters / receivers P _{1 to} P ₄ are installed on the conveyor 1 at equal intervals. For example, when the optical signal transmitters / receivers P ₁ advance to the floor, communication on the side of the transport start position S is performed. The air signals A ₁ and A ₂ are entered (see FIG. 7A), and the optical signal transmitter / receiver P ₁ and the optical signal transmitters / receivers Q ₁ and Q ₂ connected to the main controller C are brought into a communication state. Next, when the optical signal transmitter / receiver P ₁ passes through the communication areas A ₁ and A ₂ , the preceding optical signal transmitter / receiver P ₄ enters the communication areas A ₃ and A ₄ on the side of the conveyance end position G (see FIG. 7). (See (b)), this time, the optical signal transmitter / receiver P ₄ and
The optical signal transmitters / receivers Q ₃ and Q ₄ connected to the main controller C continue to be in communication. When the optical signal transmitter / receiver P ₄ passes through the communication areas A ₃ and A ₄ , the optical signal transmitter / receiver P ₂ that has advanced to the floor enters the communication areas A ₁ and A ₂ on the side of the transport start position S (see FIG. 7 (c)), this time
The optical signal transmitter / receiver P ₂ and the optical signal transmitters / receivers Q ₁ and Q ₂ connected to the main controller C are continuously in the communication state.

In this way, it is attached to the conveyor 1.
Optical signal transmitter / receiver P₁~ P_FourAny one of
However, the optical signal transmitter / receiver Q connected to the main controller C is always
₁~ Q _FourCommunication area A₁~ A_FourRunning inside
Then, the optical signal transmitter / receiver Q₁~ Q_FourMain controller connected to
C and optical signal transmitter / receiver P₁~ P_FourOptical communication system connected to
The communication state of the control device 20 is maintained, and optical communication between the two is stopped.
It never breaks.

The high voltage control signal transmitted from the main controller C to the optical communication controller 20 is the communication cable 2
1 is input to the high voltage control device 14 of each of the vehicles T _{1 to} Tn, and when each high voltage control device 14 inputs a high voltage control signal addressed to itself, the high voltage control device 14 outputs high voltage based on the data. When the generator 10 is controlled and an abnormality of the high voltage generator 10 is detected, an abnormality detection signal is output from the high voltage control device 14 to the optical communication control device 20 via the communication cable 21, and the optical communication control is performed. An optical signal is transmitted from the device 20 to the main controller C.

As described above, since each high voltage controller 14 is always in communication with the main controller C, the high voltage generator 10 is controlled individually for each of the carriages T _{1 to} Tn as in the first embodiment. it is possible to, in each truck T ₁ to Tn are traveling painting zone Z, since the low voltage is supplied in a non-contact manner via a pickup coil 8 by the power supply device 9, the contact between the current collector rail It does not cause sparks.

In the description of the above embodiment, four wide-field optical signal transmitters / receivers Q _{1 to} Q ₄ are connected to the main controller C, and four wide-field optical signal transmitters Q _{1 to} Q ₄ are equally spaced on the conveyor 1. The case where the transmitters / receivers P _{1 to} P ₄ are attached has been described, but the present invention is not limited to this, and only one wide-field optical signal transmitter / receiver is connected to the main controller C, and the communication is performed on the conveyor 1. For example, a wide-field type transceiver may be attached to each carriage at intervals according to the area. In short, one of the optical signal transmitters / receivers attached to the conveyor 1 is always connected to the main controller C so that the communication state is maintained.
It is sufficient that the optical signal transmitter / receiver connected to is installed so as to pass through the communication area.

[0035]

As described above, according to the present invention, the electromagnetic wave transmitted from the electromagnetic wave transmitting means arranged in the coating booth is received in a non-contact manner by the power supply device mounted on each carriage. Since a low voltage is output and this is boosted by a high voltage generator and applied to a work, it is not necessary to slide a contact on a power feed rail or the like to supply a high voltage, and therefore, This has the effect that no spark will occur when a high voltage is applied.

A high-voltage generator and a high-voltage control device for controlling the high-voltage generator are mounted on each trolley, and when a high-voltage control signal addressed to itself is transmitted from the main control device, the data is written to the data. In addition to individually controlling each high voltage generator based on this, when abnormalities occur in the high voltage applied to the work, an abnormality detection signal is output to the main control unit to minimize damage. Since the wireless communication by optical communication with the main control unit is possible,
Even in a coating booth to which a high voltage is applied, it has a very excellent effect that there is little malfunction due to noise.

[Brief description of drawings]

FIG. 1 is a flow sheet showing a work electrification type electrostatic coating apparatus according to the present invention.

FIG. 2 is an overall view thereof.

FIG. 3 is a front view showing a main part.

FIG. 4 is a side view thereof.

FIG. 5 is a plan view thereof.

FIG. 6 is a flow sheet showing another work type electrostatic coating apparatus according to the present invention.

FIG. 7 is an explanatory diagram showing the operation.

[Explanation of symbols]

W ······· work T ₁ ~Tn ··· truck 1 ....... conveyor 2R, 2L ··· guide rail 4R, 4L ··· chain 5 ....... slats 6 ・ ・ ・ ・ Coating machine 7 ・ ・ ・ ・ ・ ・ ・ ・ Inductive cable (electromagnetic wave transmission means) 8 ・ ・ ・ ・ Pickup coil 9 ・ ・ ・ ・ ・ ・ Power supply device 10 ・ ・ ・・ ・ ・ High voltage generator 13 ・ ・ ・ Optical communication control device 14 ・ ・ ・ ・ ・ ・ High voltage control device P _{1 to} Pn ・ ・ ・ ・ Wide field optical signal transmitter / receiver Q _{1 to} Qm・ ・ ・ ・ Wide-field optical signal transmitter / receiver A _{1 to} Am ・ ・ ・ ・ Communication area

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shinichi Nakane, 1-9 Kakimoto-cho, Toyota City, Aichi Prefecture Trinity Industry Co., Ltd. Product 72 of 6

Claims (2)

[Claims] _{1. A work} electrification type in which a high voltage is applied to a work (W) placed on a trolley (T _{1 to} Tn) and conveyed, and a coating machine (6) is connected to the ground side for coating. in electrostatic coating apparatus, wherein sends a high voltage control signal to each truck (T ₁ to Tn), the main control unit for receiving the abnormality detection signal from each truck (T ₁ ~Tn) (C) Each of the carts (T _{1 to} Tn) has a power supply unit (9) which receives the electromagnetic waves transmitted from the electromagnetic wave transmission means (7) arranged in the coating booth in a non-contact manner and outputs a low voltage. ) And a high voltage generator for boosting the voltage output from the power supply device (9) to a predetermined voltage and applying a high voltage to the work (W) through an attachment (12) mounted in an insulated state on the trolley. (10) and an optical communication control device (13) for transmitting and receiving an optical signal between the main control device (C) and A high-voltage control device (14) for controlling the high-voltage generator (10) based on the data when receiving a high-voltage control signal addressed to itself is installed, and the main control device ( A plurality of wide-field optical signal transmitters / receivers (Q _{1 to} Qm) connected to C) are installed at predetermined intervals so that the communication area (A _{1 to} Am) can cover the entire painting zone. _{1 to} Tn), the optical communication control device (13) is installed in the optical signal transmission / reception device (Q _{1 to} Qm) connected to the main control device (C). A workpiece electrification type electrostatic coating device in which visual field type optical signal transmitters / receivers (P _{1 to} Pn) are respectively connected. 2. A work electrification type in which a high voltage is applied to a work (W) placed on and conveyed by a trolley (T _{1 to} Tn), and a coating machine (6) is connected to the ground side for coating. In the electrostatic coating device, the carriages (T _{1 to} Tn) are supported by left and right guide rails (2R, 2L) arranged along an endless track in which a forward path is formed on the floor and a return path is formed under the floor. Flexible flexure (4R,
4L, 5) and a conveyor (1) in which the carriages are connected endlessly at predetermined intervals, and a high voltage control signal is transmitted to each of the carriages (T _{1 to} Tn). , A main control unit (C) for receiving an abnormality detection signal from each of the trucks (T _{1 to} Tn) is installed, and each of the trucks (T _{1 to} Tn) has an electromagnetic wave transmitting means arranged in a coating booth. A power supply device (9) that receives the electromagnetic wave transmitted from (7) in a contactless manner and outputs a low voltage, and a voltage output from the power supply device (9) is boosted to a predetermined voltage in an insulated state on the truck. A high voltage generator (10) for applying a high voltage to a work (W) through an attached attachment (12), and controlling the high voltage generator (10) based on the data of the high voltage control signal. High voltage controller (14)
Is mounted, and each high voltage control device (14) is connected to an optical communication control device (20) attached to a conveyor via a communication cable, and in the coating booth, the main control device (C) is installed. One or more wide-field type optical transceivers (Q _{1 to} Q ₄ ) connected to the optical communication controller (20) are installed in the main controller (C).
A plurality of wide-field optical signal transmitters / receivers (P _{1 to} Q ₄ ) that exchange optical signals with the optical signal transmitters / receivers (Q _{1 to} Q ₄ ) connected to
~ P ₄ ) are connected to the optical signal transmitter / receiver (P ₁ ~ P ₄ ).
A conveyor always as one or more of them may be running a main control unit (C) connected to optical signal transceiver (Q ₁ ~Q ₄₎ one of the communication area (A ₁ ~A ₄₎ A work electrification type electrostatic coating device, which is attached to (1) at a predetermined interval.