JPH0810396Y2 - UV irradiation device - Google Patents

Description

[Detailed Description of the Invention] Outline The present invention irradiates the applied paint, ink or adhesive with ultraviolet rays in order to adhere, seal, paint or print objects such as electric parts and printed wiring boards. A device for performing a photopolymerization reaction to cure the object, in which a mounting table on which an object is mounted is reciprocally driven, and a loading position and an extraction position of the object on the mounting table are provided on the same side,
This is an ultraviolet irradiating device that is short-lived and has improved safety by shortening the position path length of an object to downsize the device.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultraviolet irradiation device that irradiates ultraviolet rays to cure an object such as an electric component or a printed wiring board for printing, coating or adhesion.

Prior Art FIG. 14 is a typical prior art perspective view. The ultraviolet irradiation device 1 includes a base 2, a conveyor 3 mounted on the base 2, and a housing 4 made of a light-shielding material such as metal.
And a light source 5 covered with a light source 5. The housing 4 blocks the ultraviolet light emitted from the light source 5. An inlet 6 and an outlet 7 are formed on both sides of the housing 4 in the longitudinal direction, and a downstream end 8 and a downstream end 8 of the conveyor 3 on the both outer sides of the inlet 6 and the outlet 7 are in the transport direction A. The portion 9 is provided so as to project. An object 10 such as an electric component mounted on the conveyor 3 at the upstream end 8 in the transport direction.
Is coated with a paint or an adhesive to be cured, and is conveyed into the housing 4 through the inlet 6 as the conveyor 3 is driven downstream in the conveying direction A, and is irradiated with ultraviolet rays from the light source 5. After the paint or adhesive applied to the object is hardened, the object 10 conveyed from the outlet 7 to the downstream end 9 in the conveying direction A is taken out at this position.

Problems to be Solved by the Invention In such a prior art, the end portions 8 and 9 are required for loading or unloading the object 10 on the conveyor 3, whereby the length along the transport direction A of the apparatus 1 is increased. There was a problem that L1 would become relatively large.

Therefore, an object of the present invention is to provide an ultraviolet irradiation device which can be downsized.

Means for Solving the Problems The present invention is directed to a light source that irradiates ultraviolet rays downward, a mounting table that is disposed below the light source and mounts an object to be irradiated with ultraviolet rays, and an object for moving the object in and out. Door, a locking mechanism for locking the door, a means for reciprocating the mounting table from the mounting position of the object to directly under the light source, and an intervening member between the light source and the mounting table to block ultraviolet rays. A shutter plate made of a light-shielding material, a means for driving the shutter plate to open and close, and after the door is locked, the shutter plate is driven to open.
After that, first control means for reciprocally driving the mounting table to irradiate the object with ultraviolet rays, and when irradiation of the object with ultraviolet rays is completed, the shutter plate is driven to be closed to block the ultraviolet rays, and thereafter, It is an ultraviolet irradiation device characterized by including the 2nd control means which releases the lock of the door.

According to the present invention, as the mounting table on which the object to be irradiated with ultraviolet rays is mounted is driven by the driving means,
The object is transported from the upstream side in the transport direction of the light source, directly below the light source, and further downstream in the transport direction. At the time of such forward movement, the shutter plate is in a state in which the ultraviolet irradiation port of the light source is opened by the opening / closing driving means, and thus the object on the mounting table is irradiated with ultraviolet light from the light source,
This cures the UV curable material such as the adhesive applied to the object. In this way, the mounting table that has passed directly under the light source is driven by the drive means in the direction opposite to the transport direction during forward movement. At this time, the ultraviolet irradiation port of the light source is blocked by the shutter plate closed by the opening / closing drive means, and therefore, the ultraviolet rays are not blocked by the object on the mounting table which is moved during the backward movement. Then, it returns to the initial position, and the object on the mounting table is taken out at this position.

As described above, since the mounting table is reciprocally driven by the driving means, the mounting position and the taking-out position of the object are not different from each other as in the prior art, and accordingly, the mounting of the object on the mounting table is performed. The position and the take-out position can be made common.
As a result, it becomes possible to shorten the transportation path of the object and to downsize the device. Particularly, the present invention enables the irradiation of an object to be radiated onto the mounting table, and then locks the door for putting the irradiation object in and out to open the shutter plate to irradiate the ultraviolet rays and reciprocally drive the mounting table. Further, when the irradiation of ultraviolet rays is completed, the shutter plate is closed to block the ultraviolet rays, and then the lock of the door is released.

Therefore, when the object to be irradiated is taken in and out, ultraviolet rays never leak to the outside, and extremely safe and compact ultraviolet ray irradiation can be obtained.

Embodiment FIG. 1 is a front view showing an ultraviolet irradiation device 15 of an embodiment of the present invention, FIG. 2 is a side view of the ultraviolet irradiation device 15 shown in FIG. 1, and FIG. FIG. 3 is a plan view of the ultraviolet irradiation device 15 shown in the figure. 1 to 3, the housing on the front side with respect to the paper surface is omitted. The ultraviolet irradiation device 15 of the present invention basically mounts a light source 16 that irradiates ultraviolet rays downward, and an object to be irradiated 17 that is an object to be irradiated with ultraviolet rays that is arranged below the light source 16. The mounting table 18 is interposed between the light source 16 and the mounting table 18, and the reciprocating driving means 19 for reciprocating the mounting table 18 directly below and in the lateral direction of the light source 16, that is, in the direction perpendicular to the paper surface of FIG. A shutter plate 20 made of a light-shielding material such as metal for blocking ultraviolet rays, and an opening / closing drive means 21 for driving the shutter plate 20 to open / close.

The light source 16 is attached to a top plate 23 of a housing 22 made of, for example, a light-shielding material such as metal, and extends downward from the light source on the mounting table 18 within a range indicated by an imaginary line S in FIG. It is configured to emit ultraviolet light. On the top plate 23 to which such a light source 16 is attached,
The opening / closing drive means 21 is provided. This opening / closing drive means 21
Is the double-acting cylinder 24 and the piston rod 25 of the double-acting cylinder 24.
The mounting piece 26 fixed near the tip of the
The shutter plate 20 is fixed to the. Double acting cylinder
24, when compressed air is supplied from an air pressure source (not shown), the piston rod 25 is extended in the arrow A1 direction, or the arrow
The shutter plate 20 is reciprocally driven by retracting in the A2 direction. The shutter plate 20 can cover the lower surface 27 of the light source 16 over the entire surface, and thus the piston rod 25 of the double-acting cylinder 24.
In the state in which is degenerated in the arrow A2 direction, the lower surface 27 of the light source 16 is prevented by the shutter plate 22 over the entire area. This ensures that the ultraviolet light emitted from the light source 16 is blocked. Further, the double-acting cylinder 24 has built-in third and fourth detectors S3, S4 for detecting the position of the piston of the piston rod 25.
It is detected that 5 is extended or degenerated. The shutter plate 20 has an arrow A by means of guide rods 29a, 29b through which a pair of guide pieces 28a, 28b provided at both ends in the longitudinal direction are inserted.
Guided along the direction A1 and A2, both ends of each of the guide rods 29a, 29b are supported by supporting pieces 30a, 30b; 31a, 31b, and these supporting pieces 30a, 30b; 31a, 31b. Is fixed to the top plate 23.

The bottom plate 34 of the housing 22 includes support pieces 35a, 35b; 36a,
36b is erected. Both ends of a screw rod 37 having a ball screw formed on the outer peripheral surface thereof are rotatably supported by the support pieces 35a, 36a so as to be rotatable about a rotation axis. This screw rod 37 has the pulley 38
Are provided coaxially. Also, the guide bar 3 is attached to the support pieces 35b and 36b.
Both ends of 9 are supported. The axis of the guide rod 39 is parallel to the rotation axis of the screw rod 37.

A motor M is also arranged on the bottom plate 34. The pulley 40 is fixed to the output shaft 42 of the motor M, and the pulleys 38, 4
A belt 41 is wound around 0. Therefore, motor M
Is energized, the output shaft 42 is driven to rotate about its rotation axis, and the threaded rod 37 is driven to rotate about its rotation axis via the pulley 40, the belt 41 and the pulley 38.

Bearing pieces 43a, 43b attached to the mounting table 18 are mounted on the screw rod 37 and the guide rod 39. Therefore, when the screw rod 37 is driven to rotate about its rotation axis, the mounting table 18 is driven to reciprocate along the axes of the screw rod 37 and the guide rod 39 in the directions of arrows A1 and A2.

The reciprocating drive means 19 having such a structure is used for the mounting table 18
Is detected by the first detector S1 which is realized by a micro switch or the like when it is arranged near the door 45 provided on the front plate 44 of the housing 22, and is displaced and driven in the direction of arrow A1. When it moves to the terminal position, it is detected by the second detector S2.

FIG. 4 is a front view of the vicinity of the door 45, and FIG. 5 is a perspective view of the door 45 shown in FIG. A door 45 provided on the front plate 44 of the housing 22 is provided with a handle 46 and an endoscopic window 47. A glass for blocking light such as ultraviolet rays is fitted into the window for internal viewing 47, and the inside of the housing 22 can be viewed through the window 47. By pulling the handle 46 toward the front side, that is, in the direction of arrow B1 in FIG. 5, the door 45 can be opened by angularly displacing the hinge 48 about the rotation center, and by pressing in the direction of arrow B2. You can close it.

Locking means 49 shown in FIG. 6 is provided on the back side of the handle 46 of the door 45. This locking means 49 is the door 45
The lock piece 50 protruding from the back side of the
A locking piece 52 partially fitted in a locking hole 51 formed in 50 and an electromagnetic solenoid 53 for driving the locking piece 52 to reciprocate in the directions of arrows C1 and C2 are provided. The locking piece 52 is fixed to the tip end portion of the drive rod 54 of the electromagnetic solenoid 53, and has a conical surface 55 fitted into the locking hole 51 of the lock piece 50. When the locking piece 52 is fitted in the locking hole 51, the conical surface 55 is locked in contact with the inner peripheral surface of the locking hole 51 over the entire circumference in the circumferential direction. This allows the door 45 to be arrowed, as shown in FIG.
The rubber frame-shaped seal member 56 provided on the back surface of the door 45 is elastically brought into contact with the outer surface of the front plate 44 so that the housing 22 can be pressed in the B2 direction. Ultraviolet rays can be blocked by sealing around the entrance / exit 57.

FIG. 8 is a block diagram showing a schematic electrical configuration of the ultraviolet irradiation device 15. The outputs from the first to fourth detectors S1 to S4 are input to the control circuit 60. This control circuit 60
When the start button 61 is pressed, the electromagnetic solenoid 53 is activated based on the output signal from the start button 61.
After deriving a signal for exciting the door 45 to lock the door 45, the electromagnetic solenoid 24 of the opening / closing drive means 21 is excited to activate the shutter plate 20.
Is moved in the direction of the arrow A1 to open the lower surface 27 of the light source 16, and the motor M of the reciprocating drive means 19 is energized to move the mounting table 18 with the arrow.
It is configured to be reciprocally displaced in the A1 and A2 directions.

FIG. 9 is a flow chart for explaining the operation of the ultraviolet irradiation device 15, and FIG. 10 is a simplified diagram for explaining the operation of the mounting table 18 and the shutter plate 20.
FIG. 11 is a timing chart for explaining the control operation of the control circuit 60. First, as shown in FIG. 10 (1), the shutter plate 20 is stopped with the light source 16 closed, and the mounting table 18 is stopped at the first position near the door 45.
As shown in FIG. 12, the door 45 is opened in the arrow B1 direction, the irradiation target 17 is placed on the mounting table 18, and the door 45 is operated in the arrow B2 direction to be in a closed state. At this time, the first detector S1 is the mounting table.
It detects that 18 is arranged at the first position and derives its detection signal, and accordingly, it is in the ON state. Further, the third detector S3 provided in the double-acting cylinder 24 that drives the shutter plate 20 is the piston rod 25 of the double-acting cylinder 24.
Is extended to bring the light source 16 into a state in which the shutter plate 20 is closed, and the detection signal thereof is derived to be in an on state. The other two detectors S2 and S4 are both off.

In this state, in step n1, when the start button 61 is pressed at time t1 shown in FIG. 11 (1), the signal from the start button 61 is input to the control circuit 60. The control circuit 60 derives a drive signal to the lock means 49. When this drive signal is input to the lock means 49 from the control circuit 60, the electromagnetic solenoid 53 is excited and the drive rod 54 is changed from the state shown in FIG. 13 (1) to FIG. 13 (2).
As shown in Fig. 5, the conical surface 55 of the locking piece 52 fits into the locking hole 51 of the locking piece 50, whereby the locking piece 50 is pulled in the direction of the arrow B2, and the door is opened at step n2. While 45 is closed, the shutter plate 20 starts to be displaced in the direction of arrow A1 at step n3, and is completely opened at step n3 as shown in FIG. 10 (2).
This is detected in step n4 by the fourth detector S4. When the fourth detector S4 detects that the shutter plate 20 is completely open, the process proceeds to step n5, and the mounting table 18 starts to be displaced in the arrow A1 direction. The irradiation target 17 on the mounting table 18 is irradiated with ultraviolet rays when passing under the light source 16, and the adhesive or paint applied to the irradiation target 17 is cured. Thus the mounting table
When 18 passes under the light source 16 shown in FIG. 10 (3) and further reaches the extreme end position in the arrow A2 direction at step n7 as shown in FIG. 10 (4), the second detector S2 derives a detection signal at time t4, whereby the shutter plate 20 closes the light source 16 at time t5 as shown in FIG. 10 (5) through the operation of closing from time t4 at step n8. This state is maintained until the start button 61 is pressed again.

At step n9, when it is detected by the first detector S1 that the shutter plate 20 is completely closed, the mounting table 18
Starts the backward movement in the direction of arrow A2, and when the first detector S1 detects that the mounting table 18 has returned to the initial position at time t6 at step n11, the mounting table 18 moves to step n12.
At step n13, the lock state of the door 45 is unlocked. In this way, the cured irradiation target 17 on the mounting table 18 with the door 45 opened is taken out.

As described above, according to the present invention, since the mounting table on which the object to be irradiated with the ultraviolet rays is mounted is reciprocally driven, the position where the object is mounted on the mounting table and the ultraviolet rays are The extraction position of the object after being irradiated can be made to be a common position, which can shorten the length of the conveying path of the object, and thus the device can be downsized. Like Moreover, since the light source is closed by the shutter plate at least when the object is placed on the mount table by the shutter plate and when the object on the mount table is taken out, the integrity is improved with a simple configuration. To be done. In particular, according to the present invention, a locking mechanism for locking the door for putting in and out the irradiated object is provided, and by the first control means, after the door is locked, the shutter plate is driven to open, and thereafter. The mounting table is reciprocally driven to irradiate the object to be irradiated with ultraviolet rays, and the second control means closes the shutter plate after the irradiation of the ultraviolet rays is completed to block the ultraviolet rays to the object to be irradiated, and then locks the object. Since it is canceled, ultraviolet rays never leak outside when the object to be irradiated is put in or taken out. Therefore, it is extremely complete. Further, as described above, according to the present invention, the structure is downsized.

[Brief description of drawings]

FIG. 1 is a front view showing an ultraviolet irradiation device 15 of an embodiment of the present invention, FIG. 2 is a side view of the ultraviolet irradiation device 15 shown in FIG. 1, and FIG. 3 is an ultraviolet irradiation shown in FIG. FIG. 4 is a plan view of the device 15, FIG. 4 is a front view of the vicinity of the door 45, FIG. 5 is a perspective view of the door 45 shown in FIG. 4 as seen obliquely from the rear side, and FIG. 6 is an enlarged perspective view showing the locking means 49. FIG. 7 is a plan view showing a state where the door 45 is locked by the locking means 49, FIG. 8 is a block diagram showing a schematic electrical configuration of the ultraviolet irradiation device 15, and FIG. 9 is an ultraviolet irradiation device 15. 10 is a flow chart for explaining the operation of the table, FIG. 10 shows a mounting table 18 and a shutter plate 20.
Is a simplified diagram for explaining the operation of FIG. 11, FIG. 11 is a timing chart for explaining the control operation of the control circuit 60,
12 is a simplified perspective view of the ultraviolet irradiation device 15 showing the mounting table 18 in the first position, FIG. 13 is a simplified perspective view for explaining the operation of the shutter plate 20, and FIG. FIG. 1 is a typical prior art perspective view. 15 ... Ultraviolet irradiation device, 16 ... Light source, 17 ... Irradiated object,
18 ... Mounting table, 19 ... Reciprocating driving means, 20 ... Shutter plate, 21 ... Opening / closing driving means, S1 to S4 ... First to fourth detectors

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location C08J 7/00 304 H05K 3/28 Z 3/34 502 Z 8718-4E

Claims (1)

[Scope of utility model registration request] 1. A light source for irradiating ultraviolet rays downward, a mounting table disposed below the light source for mounting an object to be irradiated with ultraviolet rays, a door for putting in and taking out the object, and the door. A locking mechanism that locks the table, means for reciprocating the mounting table from the mounting position of the object to directly below the light source, and a shutter made of a light-shielding material that is interposed between the light source and the mounting table and blocks ultraviolet rays. A plate, a means for driving the shutter plate to open and close, a first control means for driving the shutter plate to open after locking the door, and then reciprocally driving the mounting table to irradiate the object with ultraviolet rays. A second control means for closing the shutter plate to shut off the ultraviolet light when the ultraviolet light irradiation to the object is completed, and then unlocking the door. .