JP5018391B2 - Paste applicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a plurality reflection mirrors has to be installed to bend the directions of lights between a plurality of movable objects, especially, when a transmission direction is different from a reception direction, while a signal line is not required by using an optospatial device in transmitting and receiving different signals for the plurality of movable objects. <P>SOLUTION: An optical communication device has a structure in which slits are provided on each reflection mirror so that signals are exchanged with a plurality of moving objects using one reflection mirror when a transmission direction is different from a reception direction. With this configuration, signals can be stably transmitted between each of transmitters and receivers without causing crosstalk. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

The present invention is variable dynamic site there is a plurality, a control system of the apparatus which requires high-speed information communications.

  In order to reduce the number of wirings and reduce wiring in communication between conventional information communication apparatuses, an optical space communication method for performing information communication using optical communication has been developed. When the method is used in an apparatus, it becomes necessary to change the direction of the optical axis of a light beam for optical communication as the apparatus configuration becomes complicated, and a mirror or the like is generally used. For example, as shown in Patent Document 1, when a signal is transmitted to a movable body, light is transmitted using a mirror.

Japanese Unexamined Patent Publication No. 7-115398

  As described above, the light beam reflected from the mirror is diffused depending on the distance of the counterpart optical space communication device, and the light reflected from the outside is mixed in addition to the required optical signal. Quality may not be obtained.

  As a countermeasure, there is a method of concentrating the luminous flux with a lens or the like. However, when the optical space communication device moves, the focal length needs to be adjusted, and a complicated control mechanism is indispensable. In addition, a dedicated mirror was installed in one optical space communication device. When installing a plurality of optical space communication devices, it was necessary to install a plurality of mirrors.

  In addition, this method requires adjustment of each mirror and requires a large installation space. Moreover, since there are a plurality of mirrors, an external light source may be reflected, resulting in optical signal noise.

  Furthermore, when a plurality of optical space communication devices are used with a single mirror, the light flux of the optical space communication device corresponding to the adjacent or adjacent mirror is changed to the optical space when the arrangement of the communication devices and the distance from the mirror are different. By entering and interfering with the communication device, stable communication quality cannot be obtained due to the influence of the light sources of each other.

  Therefore, an object of the present invention is to transmit signals even if a reflection mirror is provided between the transmission source and the receiver in order to transmit optical signals from a plurality of transmission sources to a plurality of receivers having different directions. It is to provide an optical space communication device that can transmit stably.

In order to achieve the above object, in the present invention, a table for placing a substrate on a gantry is provided, and a plurality of application heads are provided on a movable portal frame so as to be movable in the longitudinal direction of the portal frame, In a paste applicator having an optical space communication device for exchanging signals between a transmitter / receiver provided on the gantry side and a transmitter / receiver provided on each side of the plurality of coating heads, Between the transmitter and receiver on the coating head side, one reflecting mirror is provided on one of the portal frames, and the light transmission direction is bent by the reflecting mirror in a substantially right angle direction, and optical signals from a plurality of transmitters on the transmitting side are transmitted. In order to prevent interference , a plurality of slits are formed in the reflecting mirror by cutout holes, and a plurality of reflecting portions are formed for optical signals from the plurality of transmitters / receivers on the transmitting side .

  In the present invention, the optical communication control system is provided in the mirror in the mechanism that can move to an arbitrary position and has a plurality of optical space communication devices, thereby minimizing the distance between the optical space communication devices and each space optical communication. It is possible to ensure stable communication quality in the device.

  In order to reflect the light source of the optical space communication device arranged at a plurality of different distances with one mirror, it is necessary to accurately reflect the light flux of each light source to the counterpart optical space communication device.

  A conceptual diagram of the optical space communication apparatus is shown in FIG. An optical signal S1 is emitted from the transmission side 1 for performing optical communication and sent to the reception side 2. In almost all manufacturing apparatuses using optical space communication, the transmission side 1 and the reception side 2 cannot be arranged on the same axis. Therefore, the optical signal S1 is reflected in the direction of the receiving side 2 by the reflecting surface 4 of the reflecting mirror (hereinafter sometimes referred to as a mirror) 3 and the reflected light S2 is received by the receiving side 2.

  At this time, the light signal S1 emitted from the transmission side 1 has a diameter (S1a) of the light beam reaching the mirror 3 due to the diffusion of light before being reflected by the mirror 3, rather than the diameter of the light beam immediately after being emitted from the transmission side 1. It gets bigger. Further, the reflected light S2 reflected has a larger diameter (S2a) of the luminous flux when it reaches the receiving side 2 immediately after being reflected. When optical space communication devices are adjacent to each other, there is a high possibility that the communication quality is deteriorated due to interference or the like. Note that there is no effect when only one set of optical space communication device is used.

  On the other hand, when a plurality of optical space communication devices are used, the communication quality may be greatly affected by the installation distance of both space optical communication devices. Further, when the positions of both the transmission side 1 and the reception side 2 are fixed, it is possible to prevent deterioration of communication quality by determining the arrangement of the communication devices in consideration of the amount of diffusion of the light beam. However, when the transmitting side 1 or the receiving side 2 is arbitrarily movable in the optical axis direction A and a plurality of optical space communication devices are used, the amount of light flux diffusion at an arbitrary position is calculated and the distance between the optical space communication devices is calculated. It is necessary to determine L, and it is necessary to set the distance L between the optical space communication devices according to the diffusion diameter of the light flux at the maximum distance between the transmission side 1 and the reception side 2.

  In such a case, the distance L between the optical space communication devices becomes large and the installation space becomes large.

  Therefore, in the present invention, a mechanism for controlling the diffusion of the light beam is provided in the mirror 3 that reflects light in order to cope with the light beam diameter that may change on the transmitting side 1 or the receiving side 2 that can be arbitrarily moved. It was decided.

  FIG. 1 shows a schematic diagram of an optical space communication apparatus of the present invention. In this figure, a plurality of light emitting sections (or transmitters) 1 for transmitting light having information are provided on the transmitting side, and this transmitter 1 is configured to be movable in the direction indicated by an arrow A (optical axis direction) in the figure. Has been. In order to transmit signals to a plurality of transmitters that transmit different information on light and a plurality of receivers installed in a receiving direction different from the transmitting direction of the transmitter, the present invention provides a single reflecting mirror. Is used to change the traveling direction of each light so that each receiver can receive the light of the corresponding transmitter. For example, in a coating apparatus having a plurality of coating heads as shown in FIG. 4, it is provided on a fixed part (on the ground side) in order to transmit signals to a plurality of coating heads movably provided on a gantry. A signal is transmitted from a plurality of transmitters via a reflecting mirror.

  As shown in FIG. 3, the light signal S1 emitted from the transmitter 1 has a light beam diameter S1a larger than that immediately after transmission until it reaches the mirror 3 that is a reflecting mirror. On the other hand, the mirror 3 is provided with a reflecting portion 4 and a slit 5 (or may be configured by pasting a light reflection suppressing material or the like). The slit 5 is provided to suppress the reflection of light and serves as a control unit that controls the reflection of light. Moreover, the reflection part 4 is set as the structure which can be set to arbitrary reflection directions mutually. When a light beam strikes the reflecting mirror 3, the diffused light beam collides with the reflecting portion 4 and the slit 5. Among them, the light hitting the slit 5 is absorbed, and the light hitting the reflecting portion 4 becomes reflected light S2 and travels toward the receiver 2 side.

  Further, the light hitting the slit 5 is controlled so as to be reflected in a direction different from the direction of the reflected light (or by a reflection suppressing material). That is, only the amount of light hitting the reflection unit 4 becomes the reflected light S2 and travels toward the receiver 2 side. Thereby, the light quantity and light beam diameter of the optical communication on the receiver 2 side can be quantified regardless of the position of the transmission unit 1 in the moving direction A. In addition, by limiting the reflection unit corresponding to each optical space communication device, it is possible to reduce the interference light caused by the light source of the outside (or adjacent or nearby optical space communication device) and maintain stable communication quality. .

  As an example of the slit 5 applied to the reflecting mirror 3, various geometric shapes are conceivable as shown in FIG. (A) is a cutout hole of the rectangular mold 5a, (b) is a cutout hole of the parallelogram mold 5b, and a cutout hole of the cross shape 5c in FIG. Although a cutout hole was taken as an example, instead of opening a hole, the periphery of the reflection part can be formed with a material that suppresses reflection of light (light absorbing member), or a coating that suppresses reflection can be applied around the reflection part. Is possible. Further, the reflecting section 4 can have a shape such as a plane reflecting surface or a surface with a curved surface, and an arbitrary reflection angle can be set with respect to the reflecting mirror 3.

  The reflecting mirror 3 can increase the number of optical space communication devices that can be supported by the combination of the reflecting section 4 and the slit 5.

  FIG. 4 shows a configuration when the above invention is applied to a seal coating apparatus. The seal coating apparatus shown in FIG. 4 is provided on the gantry 50 so that the two gantry (gate-type moving mechanisms) 20A and 20B straddle the table on which the substrate 16 is placed so as to be movable in the longitudinal direction of the gantry. is there. Further, a plurality of coating heads 8A to 8D and 8E to 8H are provided on the gantry frames 30A and 30B so as to be movable in the longitudinal direction of the frame. Each coating head is provided with a drive system for performing coating control, but it is necessary to send a control signal to the drive system, a signal for alignment, and the like. At this time, it is possible to connect the main control unit 10 that controls the entire apparatus to the control unit of each coating head unit by a signal line, but there is a problem in that the number of signal lines increases and resistance in movement reduces the alignment accuracy. There is. Therefore, in addition to reducing the influence of the signal line, optical space transmission is adopted to reliably transmit the control signal, and the number of parts used for signal transmission is reduced as much as possible. Therefore, since the transmitter / receiver provided on the ground side and the transmitter / receiver provided on the coating head side are oriented substantially at right angles, the number of reflectors for changing the direction of light is usually required for the number of transmitters or receivers. A single mirror can transmit signals between a plurality of transmitters and receivers. That is, the light traveling direction is changed by using the reflector with a slit described above.

  The main control unit 10 transmits control signals to the transceivers 11A to 11H. The transceivers 11A to 11H convert electrical signals into optical signals and transmit the optical signals to the transceivers 13A to 13H provided on the head side. Among these transceivers, the transceivers 11A to 11D are for transmitting signals with the transceivers 13A to 13D of the coating heads 8A to 8D provided in the frame 30A. The transceivers 11E to 11H are for transmitting signals (not shown) between the transceivers provided in the coating heads 8E to 8H provided in the frame 30B. In this case, the transceivers 11A to 11H emit signal light in the moving direction of the frames 30A and 30B, and reflect the light so as to travel to the longitudinal side of the frame by the reflecting mirrors with slits provided in the respective frames, Light is transmitted to each coating head provided on the frame.

  Further, in this figure, the power line is also configured to be able to perform non-contact power feeding. That is, the electric wire support member 19 is provided from the power source 54 to both ends on the gantry. The primary power supply lines 17 and 18 are wired so as to penetrate through the power supply cores 6A and 6B provided in the gantry 20A and 20B moving between the wire support members 19. Secondary power supply lines 7A and 7B are wound around the cores 6A and 6B, respectively. The secondary power supply lines are attached to the frames via the wire support members 15 provided in the frames 30A and 30B. The feed cores 9A to 9H provided in the respective coating heads are wired through. Electric power is supplied to each head through a tertiary power supply line provided in a power supply core provided in each head.

The optical space communication apparatus of the present embodiment needs to bend the light transmission direction substantially perpendicularly as shown in the figure, and the reflecting mirrors 14A and 14B are arranged in the frames 30A and 30B . As described above, the reflecting mirror is provided with a slit, which enables each transmitter / receiver to transmit an optical signal without interference. In the present embodiment, the ground side (mounting side) transceiver is fixed, but the head side transceiver is configured to move along the frames 30A and 30B. The moving head-side transmitter is configured to transmit head position information and the like to the ground-side receiver.

  Thus, by applying the configuration of the reflecting mirror of the present invention, only one reflecting mirror is required between the transmitter and the receiver, and signals can be reliably transmitted and received without complicating the device configuration. It becomes possible.

It is a conceptual diagram of the communication structure which has several optical space communication apparatus. It is a figure of the form Example for controlling the light beam of a reflective mirror. It is a conceptual diagram of the communication structure which has an optical space communication apparatus. It is a block diagram when optical space communication is applied to a paste application device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Transmission side, 2 ... Reception side, 3 ... Reflection mirror (mirror), 4 ... Reflection part, 5 ... Slit, 6A, 6B ... Core, 8A-8H ... Coating head, 9A-9H ... Feeding core, 10 ... Main controller, 11A to 11H ... transceivers, 13A ~ 13 H ... transceiver, 14A, 14B ... reflector.

Claims (1)

A table for placing the substrate on the gantry is provided, and a plurality of application heads are provided on a movable portal frame so as to be movable in the longitudinal direction of the portal frame. In a paste coating machine having an optical space communication device for exchanging signals between transceivers provided on each side of the coating head,
One reflector having a reflecting portion is provided on one gate-shaped frame between the transmitter / receiver on the gantry side and the transmitter / receiver on the plurality of coating heads, and the light transmitting direction is set substantially perpendicular to the reflecting portion. A plurality of slits are formed in the reflecting mirror with cutout holes so that optical signals from a plurality of transmitters / receivers on the transmission side do not interfere with each other, and a plurality of reflections for optical signals from the plurality of transmitters / receivers on the transmission side are formed. A paste applicator characterized by forming a part .

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