JP2011114498A - Irradiation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an irradiation device in which analog data transmitted from a sensor is prevented from being affected by noise, a distance between a sensor and a signal processing part is made long, and in addition, sensors are easily exchanged. <P>SOLUTION: The irradiation device includes: a light source 11; a sensor 2 for measuring the irradiation strength of the light source 11 and transmitting analog data of a measurement result; a first connection cable 3 the one end of which is inserted and fixed to the sensor 2 so as to be freely inserted and extracted; an amplifier 4 to which the other end of the first connection cable 3 is inserted and fixed so as to be freely inserted and extracted and which receives the analog data through the first connection cable 3, performs A/D conversion of the analog data and transmits digital data; a second connection cable 5 the one end of which is inserted and fixed to the amplifier 4 so as to be freely inserted and extracted; and a signal processing part 6 to which the other end of the second connection cable 5 is inserted and fixed so as to be freely inserted and extracted and which receives the digital data through the second connection table 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an irradiation apparatus.

  2. Description of the Related Art Conventionally, there is known an irradiation apparatus for curing an ultraviolet curable resin, a paint, or the like by irradiating the irradiated portion to which the ultraviolet curable resin, the paint, or the like is applied with an ultraviolet ray. And the irradiation instrument which hardens the UV ink adhering to the printing medium by irradiating an ultraviolet-ray with respect to the printing medium printed by the said printing machine is provided (for example, refer patent document 1).

  The irradiation tool includes a light source that emits ultraviolet light, a sensor that measures the irradiation intensity of ultraviolet light emitted from the light source, and sends analog data of the measurement result, a connection cable having one end connected to the sensor, and a connection cable And a signal processing unit having an A / D converter for receiving analog data from the sensor via the connection cable and A / D converting the analog data.

  That is, analog data generated by the sensor is A / D converted after being transmitted to the signal processing unit via the connection cable.

JP 2005-227241 A

  However, in the irradiation apparatus in the above-described conventional example, the data relating to the irradiation intensity of the ultraviolet rays transmitted from the sensor is transmitted as analog data until the signal processing unit receives it, and after being received by the signal processing unit, the A / D Since the data is converted, the transmission distance of the analog data is long, and the analog data is affected by noise, so that there is a possibility that the data regarding the irradiation intensity of ultraviolet rays may not be correctly transmitted to the signal processing unit.

  In addition, if the length of the connection cable is increased in order to increase the distance between the sensor and the signal processing unit, the analog data transmission distance becomes longer and the analog data becomes more susceptible to noise. There is a problem that the distance between the signal processing unit and the signal processing unit cannot be increased.

  Further, there has been a demand for an irradiating device that can easily replace the sensor without using a tool or the like.

  The present invention has been made in view of the above-described reasons, and its purpose is to reduce the influence of analog data sent from a sensor on the influence of noise, and to further reduce the distance between the sensor and the signal processing unit. It is another object of the present invention to provide an illuminating device that can be lengthened, and in addition, can easily replace a sensor.

  The invention of claim 1 includes a light source, a sensor for measuring the irradiation intensity of the light source and sending analog data of the measurement result, a first connection cable having one end connected to the sensor, and a first connection cable. A data conversion means for receiving analog data via the first connection cable with the end connected, A / D converting the analog data and sending digital data, and a second connected to the data conversion means at one end And a signal processing unit connected to the other end of the second connection cable and receiving digital data via the second connection cable, the first connection cable provided in the data exchange means A first connector in which the other end of the second connection cable is removably inserted, a second connector provided in the data exchange means, in which one end of the second connection cable is removably inserted, and the signal processing unit In The other end of the vignetting and second connection cables of the third connector which is inserted to removably inserted, characterized in that one at least one is provided.

  According to the present invention, the data conversion means is disposed between the signal processing unit and the sensor, so that the analog data transmission distance is shortened and the analog data is less affected by noise. Furthermore, the distance between the sensor and the signal processing unit can be increased by increasing the transmission distance of the digital data.

  In addition, the first connection cable connected to the sensor is detachably attached to the data exchange means, or the second connection cable is connected to the sensor via the first connection cable. The connection cable can be inserted and removed freely, so that the sensor can be easily replaced.

  According to a second aspect of the present invention, in the first aspect of the invention, the light source emits ultraviolet light, and the signal processing unit has a control unit that controls the ultraviolet irradiation intensity of the light source based on received digital data. It is characterized by.

  According to the present invention, the control unit can perform feedback control for controlling the ultraviolet irradiation intensity of the light source based on the received digital data.

  As described above, in the present invention, the analog data sent from the sensor can be reduced from being affected by noise, and the distance between the sensor and the signal processing unit can be increased. There is an effect that the sensor can be easily replaced.

The block diagram of the irradiation instrument in embodiment of this invention is shown. (A)-(c) shows the sensor part of the irradiation instrument in the same as the above, (a) is a top sectional view, (b) is a first side sectional view, (c) is a second side sectional view. Show.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment)
Conventionally, there is known a printing machine that discharges ultraviolet curable ink (hereinafter referred to as UV ink) having a property of being cured by being irradiated with ultraviolet rays from a print head. For example, it is used to cure the UV ink attached to the printing medium by irradiating the printing medium printed by the printing machine with ultraviolet rays.

  As shown in FIG. 1, the irradiation tool includes an irradiation head 1 that irradiates ultraviolet rays, an ultraviolet sensor 2 that measures the ultraviolet irradiation intensity of the irradiation head 1, and a first connection cable 3 that has one end connected to the ultraviolet sensor 2. An amplifier 4 in which the other end of the first connection cable 3 is removably inserted, a second connection cable 5 in which one end is removably inserted into the amplifier 4, and a second connection cable 5 The signal processing unit 6 is inserted into the other end so that it can be inserted and removed, and a third connection cable 7 connects the irradiation head 1 and the signal processing unit 6.

  The irradiation head 1 includes a light source 11 composed of an ultraviolet light emitting diode (hereinafter referred to as UVLED) and a lighting circuit 12 that lights the light source 11. In addition, UVLED is an abbreviation for Ultra Bior Light Emitting Diode.

  As shown in FIG. 2, the ultraviolet sensor 2 is mounted with a substantially rectangular flat plate-shaped filter 21 that transmits only light in the ultraviolet region, a photodiode 22 in which the filter 21 is disposed opposite to the light receiving surface, and the photodiode 22. The sensor substrate 23 to which one end of the first connection cable 3 is connected, the substantially flat cushion rubber 24 on which the sensor substrate 23 is placed, the filter 21, the photodiode 22, the sensor substrate 23, and the cushion rubber 24 are provided. A case 26 having an insulating paper 25 attached to the inner surface facing the sensor substrate 23 is provided. Hereinafter, description will be made with reference to the top, bottom, left, and right in FIG. Note that the photodiode 22 and the first connection cable 3 are electrically connected via the sensor substrate 23.

  The case 26 is formed in a substantially rectangular parallelepiped shape, and a case main body 261 in which a concave portion 261a is formed on the lower surface along the longitudinal direction (left-right direction in FIG. 2), and an opening of the concave portion 261a provided on the lower surface side of the case main body 261. And a cover 262 having a substantially U-shaped cross section.

  A concave portion 261b having a substantially rectangular shape is formed on the bottom surface of the concave portion 261a, and an insertion hole 261c is formed in the approximate center of the concave portion 261b.

  And the filter 21 is arrange | positioned in the recessed part 261b, and the sensor board | substrate 23 with which the photodiode 22 was mounted is arrange | positioned in the downward side so that the light-receiving surface of the photodiode 22 may oppose the filter 21 under it. Is provided. Further, a cushion rubber 24 is disposed on the lower surface side of the sensor substrate 23. Subsequently, a screw (not shown) is inserted into an insertion hole 262 a formed in the cover 262 and screwed into a screw hole 261 d formed in the base 261, whereby the cover 262 is fixed to the base 261.

  When the light from the light source 11 enters the filter 21 through the insertion hole 261b, the filter 21 selectively transmits only the light in the ultraviolet region included in the light, and the light transmitted by the photodiode 22 through the filter 21 ( UV light). Subsequently, the photodiode 22 outputs a detection signal corresponding to the intensity of the received ultraviolet rays to the sensor substrate 23, and the sensor substrate 23 generates analog data relating to the intensity of the ultraviolet rays based on the input detection signal, Data is sent to the first connection cable 3.

  One end of the first connection cable 3 is connected to the sensor substrate 23 of the ultraviolet sensor 2, and a plug-type connector (hereinafter referred to as a first plug connector 31) is provided at the other end.

  The amplifier 4 is provided with a socket-type connector (hereinafter referred to as a first socket connector 41) into which the first plug connector 31 of the first connection cable 3 is removably inserted. The first plug connector 31 is inserted into the socket connector 41. The amplifier 4 receives analog data via the first connection cable 3, amplifies the received analog data, and performs A / D conversion.

  In addition, a plug-type connector (hereinafter referred to as a second plug connector 51) provided at one end of the second connection cable 5 is inserted into the amplifier 4 so as to be detachable. The second plug connector 51 is inserted into the second socket connector 42 and the digital data is transmitted to the second connection cable 5.

  Further, the second connection cable 5 is provided with a plug-type connector (hereinafter referred to as a third plug connector 52) at the other end, and the socket-type connector in which the third plug connector 52 is provided in the signal processing unit 6. (Hereinafter referred to as a third socket connector 63).

  The signal processing unit 6 is, for example, a personal computer, and the third socket connector 63 to which the second connection cable 5 is connected and a storage unit for storing digital data received via the second connection cable 5. 61 and a control signal for changing the irradiation intensity of the ultraviolet light irradiated from the irradiation head 1 based on the received digital data, and the control signal is sent to the irradiation head 1 via the third connection cable 7. And a control unit 62.

  Here, in general, UVLEDs gradually irradiate ultraviolet rays that are output as the lighting time elapses. Therefore, UVLEDs irradiate ultraviolet rays onto a print medium printed with UV ink. In the irradiation device, the irradiation intensity of ultraviolet rays necessary for curing the UV ink is insufficient as the operation time increases, and the UV ink attached to the print medium may not be sufficiently cured. Therefore, it is necessary to stabilize the ultraviolet irradiation intensity of the light source 11.

  When the control unit 62 receives the digital data, the control unit 62 compares the digital data with a preset threshold value. When the digital data is out of the threshold value, the lighting circuit of the irradiation head 1 is connected via the third connection cable 7. 12 sends a control signal. And the lighting circuit 12 which received the control signal changes the supply current value with respect to the light source 11 so that the ultraviolet irradiation intensity | strength of the light source 11 may correspond with a predetermined | prescribed threshold value based on the said control signal. For example, when the digital data falls below a predetermined threshold, the control unit 62 sends a control signal for increasing the supply current to the light source 11 to the lighting circuit 12, and when the digital data exceeds the predetermined threshold, A control signal for reducing the supply current is sent to the lighting circuit 12. As described above, the control unit 62 performs feedback control for controlling the ultraviolet irradiation intensity of the light source 11 based on the received digital data, so that the ultraviolet irradiation intensity of the light source 11 is stabilized.

  In the irradiation instrument of the present embodiment having the above-described configuration, the amplifier 4 is disposed between the ultraviolet sensor 2 and the signal processing unit 6, thereby shortening the transmission distance of analog data and increasing the transmission distance of digital data. Therefore, it is possible to reduce the influence of noise on the data relating to the ultraviolet irradiation intensity transmitted from the ultraviolet sensor 2 to the signal processing unit 6, and in addition, the distance between the ultraviolet sensor 2 and the signal processing unit 6 is increased. can do.

  In addition, the first connection cable 3 to which the ultraviolet sensor 2 is connected is detachably attached to the amplifier 4, or the amplifier 4 to which the ultraviolet sensor 2 is connected via the first connection cable 3. On the other hand, since the second connection cable 5 is detachably provided, the ultraviolet sensor 2 can be easily replaced without using a tool or the like.

  The first plug connector 31 and the first socket connector 41, the second plug connector 51 and the second socket connector 42, and the third plug connector 52 and the third socket connector 63 are plug-type. The combination of the connector and the socket type connector may be reversed.

  In the present embodiment, the lighting circuit 12 is provided in the irradiation head 1, but the lighting circuit 12 may be provided in the signal processing unit 6.

2 UV sensor 3 First connection cable 4 Amplifier 5 Second connection cable 6 Signal processing unit 11 Light source 31 First plug connector 41 First socket connector 42 Second socket connector 51 Second plug connector 52 Third Plug connector 63 Third socket connector

Claims (2)

A light source;
A sensor that measures the irradiation intensity of the light source and sends analog data of the measurement results;
A first connection cable with one end connected to the sensor;
A data conversion means for receiving the analog data via the first connection cable by connecting the other end of the first connection cable, A / D converting the analog data and sending the digital data;
A second connection cable having one end connected to the data conversion means;
A signal processing unit connected to the other end of the second connection cable and receiving digital data via the second connection cable;
A first connector provided in the data exchange means and the other end of the first connection cable is detachably inserted, and one end of the second connection cable provided in the data exchange means is detachably inserted. At least one of a second connector to be attached and a third connector provided in the signal processing unit and to be removably attached to the other end of the second connection cable is provided. Characterized irradiation device. The irradiation apparatus according to claim 1, wherein the light source emits ultraviolet rays, and the signal processing unit includes a control unit that controls ultraviolet irradiation intensity of the light source based on received digital data.

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