JPS599215B2 - Ultraviolet irradiation device with adjustable irradiation angle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for obtaining optimal irradiation conditions for an object to be irradiated using an ultraviolet irradiation apparatus using a mercury lamp as an irradiation source.

In recent years, irradiation curing treatment of ultraviolet ray curable inks and paints using mercury lamps has become more and more popular.
With the improvement in the performance of paints, it has come into practical use, and this treatment has been applied to printing paper, building materials, flat objects such as plywood, steel plates, and films, bottles, simple three-dimensional objects such as furniture, plastic molded products,
It has come to be applied to all sorts of complex three-dimensional objects such as automobile bodies.

For ordinary flat objects, an irradiation device equipped with a rod-shaped mercury lamp and a reflector is installed above the object conveyor, and the irradiation treatment is carried out while the flat objects are continuously transported. For a simple three-dimensional object ζ, the object to be treated is placed on a conveyor or suspended and transported continuously, and irradiation treatment is performed using irradiation tools placed on both sides, above, etc.

In the above example, it is easy to irradiate the entire surface of the object with the irradiation rays relatively uniformly, and there is no problem in practical use.

However, when the object to be treated is a plastic molded product, an automobile body, etc., the shape of each part is uneven, front, back, left, right, top and bottom, and it is difficult to uniformly irradiate those surfaces, and in some cases, it may be difficult to irradiate in a straight line. There are cases where the irradiation rays are blocked and no irradiation occurs.

Therefore, although ultraviolet ray curable paints cure by irradiation in seconds, do not cause air pollution from solvents, and have excellent coating performance, they are not suitable for processing objects with complex shapes. However, it was difficult to use this method, and we had no choice but to rely on conventional hot-air drying paints, which require a lot of solvent and take a long time to cure.

The present invention is an apparatus for solving these problems and obtaining an optimal and uniform irradiation surface, in which the irradiation angle of the irradiation tool can be freely adjusted according to the shape of the object to be treated.

That is, the present invention provides an ultraviolet irradiation apparatus equipped with an irradiation tool consisting of a rod-shaped mercury lamp and a reflector, and a transport device for the irradiated object, in which the irradiation surface is moved from one end of the mercury lamp when the irradiation tool is attached. Ultraviolet light whose irradiation angle can be adjusted by freely adjusting the position so that the distance from one end gets closer and the distance from the other end becomes farther away, and the irradiation angle can be adjusted by rotating around a support shaft at both ends. The irradiation device is an essential component.

Embodiments of the present invention will be explained based on the attached drawings while comparing them with a conventional device.

FIG. 4 shows a conventional apparatus suitable for irradiating a flat plate-shaped object, in which a plurality of irradiation tools each consisting of a rod-shaped mercury lamp 101 and a reflector 102 are arranged in parallel in an irradiation chamber 103. , a conveyor 105 installed in a frame 106 having leg portions 107 and the irradiation tool are disposed opposite to each other,
The object to be irradiated 107 placed on the conveyor is subjected to irradiation treatment in the irradiation chamber 183 while passing through the hood entrance/exit 104 .

1 to 3 show one embodiment of the present invention.

A mercury lamp 1 is supported at both ends by insulators 2, 2 on L-shaped lamp holders 3, 3.

Reference numeral 12 denotes a reflector whose both ends are fixed onto the pedestals 3, 3.

Reference numerals 5 and 5 designate adjustment screws for pivotally supporting the vertical pieces 3', 3' of the L-shaped lamp pedestals 3, 3 on both ends of the U-shaped bracket 4.

Therefore, the irradiation tool A can be rotated about the adjustment screws 5, 5 as a support shaft.

Reference numeral 6 denotes an L-shaped hanging piece, and a vertical piece 6' holds the center portion of the U-shaped bracket 4 with an adjusting screw 7.

Reference numeral 8 denotes a lifting rod, at the bottom of which a horizontal piece of the L-shaped hanging piece 6 is attached with an adjusting screw 9.

Reference numeral 10 denotes a fixed cylinder that slidably holds the elevating rod, and reference numeral 11 denotes a tightening screw that securely holds the elevating rod to the fixed cylinder.

In the above structure, by loosening the adjusting screws 5, 5, the L-shaped lamp pedestals 3, 3 can be rotated. 5,
5, the desired inclination angle can be maintained.

Further, by loosening the adjustment screw 7 and tightening the U-shaped bracket 4 at the rotated position, the irradiation device can be held in a position changed from a horizontal position to a horizontally tilted position.

Furthermore, by loosening the adjustment screw 9, the L-shaped hanging piece 6 can be horizontally rotated about the lifting rod 8. Therefore, the adjustment screw 9 can be tightened at the position where the irradiation tool has been rotated to an arbitrary angle. This allows the irradiation device to be held at a position that is at a different angle from a position perpendicular to the direction of movement of the conveyor.

Furthermore, by loosening the tightening screw 11, moving the elevating rod up and down, and tightening it at an arbitrary position, the irradiation tool can be held at an arbitrary height.

By installing a plurality of the above-mentioned irradiation tools, the irradiation angle can be adjusted to correspond to the shape of the object to be irradiated.

If these irradiation tools are installed not only on the top surface but also on both sides or the bottom surface, even more efficient irradiation becomes possible.

In addition, when transporting the irradiated object using a suspended conveyor, etc.,
It is also possible to use the irradiation tool by installing it laterally or so as to provide opposing irradiation.

As described above, the present invention allows optimal irradiation conditions to be obtained by the adjustment mechanism of the present invention by appropriately installing the irradiation tool in accordance with the transportation method and the shape of the object to be irradiated.

Figures 6 to 9 schematically show the relationship between the irradiation tool and the object to be irradiated, and Figure 6 is a longitudinal cross-section showing the state in which the height of the irradiation tool is raised when the object to be irradiated is relatively thick. A front view, FIG. 7 is a longitudinal sectional front view showing a state in which the irradiation tool is tilted so as to be parallel to the slope when the object to be irradiated is a three-dimensional object with an inclined top surface, and FIG. 8 is a top view. 9 is a vertical side view showing the state in which the irradiation tool is rotated so as to be parallel to the inclined surface when the irradiated object is moved in a direction perpendicular to the direction of movement in FIG. 7. FIG. 7 is a plan view showing a state in which the irradiation tool is arranged obliquely when the width is narrower than the length of the mercury lamp.

In the case of FIG. 9, the energy to be irradiated can be much increased compared to the case where the irradiation tool is disposed perpendicular to the direction of movement of the belt.

FIG. 5 shows an example having all the functions schematically shown in FIGS. 6 to 9, including a mercury lamp 201 and a reflector 202.
An irradiation tool B consisting of is supported on L-shaped pedestals 205, 205.

Reference numerals 206 and 206 are adjustment screws screwed onto both ends of the H-shaped suspension piece 207, and the L-shaped pedestals 205 and 205 can be held in a tilted state at an arbitrary angle.

Reference numeral 208 denotes a shaft protruding from both sides of the central part of the H-shaped suspension piece 207, so that the H-shaped suspension piece 207 can be attached to the U-shaped suspension piece 20.
It is supported by 9.

Reference numeral 214 is an adjustment screw screwed into the center shaft 208, and by tightening this adjustment screw, the H-shaped suspension piece 207 can be held in a state changed from a horizontal position to an inclined position.

Therefore, the irradiation tool A parallel to this can also be held in a state changed from a horizontal position to an inclined position.

Reference numeral 210 denotes a female screw fixed to the U-shaped suspension piece 209, which is threadedly engaged with the lower end of the lifting rod 211, so that the U-shaped suspension piece 209 can be held in a rotated position at any desired position. can be held in a rotated position about the lifting rod 211.

Numeral 213 is a tightening screw, and by tightening it while maintaining the lifting rod 211 at an arbitrary height, the irradiation tool B can be held at an arbitrary height.

In the embodiments of the present invention, the adjusting screws and the like attached to the keisho can be freely designed, such as a combination of bolts and nuts, a combination of nuts and nuts, or a single bolt.

As described above, the present invention allows the moving irradiation surface C to be freely adjusted in position so that the distance from one end of the mercury lamp approaches and the distance from the other end becomes farther away, and the position can be adjusted around the supports at both ends. Since the irradiation tool is attached so that the irradiation angle can be adjusted by moving the irradiation tool, the angle of the irradiation tool can be freely adjusted according to the shape of the object to be processed, and irradiation can be performed in the optimal condition. It has the effect of efficiently and uniformly irradiating a wide variety of objects with ultraviolet rays.

[Brief explanation of the drawing]

FIG. 1 is a plan view of essential parts showing an embodiment of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a side view of the same. Fig. 4 is a schematic structural diagram of a general ultraviolet irradiation device, Fig. 5 is a perspective view of the shank showing another embodiment of the present invention, and Fig. 6 is a longitudinal section showing the state in which the height of the irradiation device is raised. A front view, Fig. 7 is a longitudinal sectional front view showing the irradiation tool in a tilted state, Fig. 8 is a longitudinal sectional side view showing the irradiation tool in a rotated state, and Fig. 9 is a state in which the irradiation tool is arranged diagonally. FIG. 1... Rod-shaped mercury lamp, 12... Reflector, A... Irradiator, 3... L-shaped lamp holder, 5... ... Adjustment screw, 9 ... Adjustment screw, 8 ... Lifting rod, 11 ... Tightening screw, 101 ... Rod dog mercury pump, 102.・・・
... Reflector, 105 ... Conveyor, 201.
... Rod-shaped mercury lamp, 202 ... Reflector, 205 ... L-shaped lamp holder, 206 ...
...Adjustment screw, 207...H-type suspension piece, 20
8... Center shaft, 209... U-shaped suspension piece, 210... Female screw, 211... Lifting rod, 213...・Tightening screw, 214...
Adjustment screw.

Claims (1)

[Scope of Claims] 1. In an ultraviolet irradiation device equipped with an irradiation tool consisting of a rod-shaped mercury lamp and a reflector, and a transport device for the irradiated object, one end of the mercury lamp is attached to the irradiated object that moves when the irradiation tool is attached. The position can be freely adjusted so that the distance from one end gets closer and the distance from the other end goes away, and the irradiation angle can be adjusted freely by rotating around the supporting shaft at both ends. Ultraviolet irradiation device with adjustable irradiation angle. 2. Adjusting the irradiation angle according to claim 1, wherein the irradiation tool is rotated in a plane parallel to the irradiation surface and is fixed so as to change the angle formed with the direction of the conveying force. Ultraviolet irradiation equipment. 3. An ultraviolet irradiation device capable of adjusting the irradiation angle according to claim 1 or 2, wherein the irradiation tool is attached so that the distance from both ends of the mercury lamp to the surface to be irradiated approaches or recedes at the same time.