JPH061818Y2 - Attachment for light irradiation device of thermal plate making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an attachment used for a light irradiation device of a small-sized thermal plate making apparatus.

[Prior Art] As a heat-sensitive plate making apparatus for making a plate for stencil printing,
A light irradiating device having a plurality of bulb mounting parts to which light source bulbs are individually mounted and a reflecting mirror for reflecting the light beams of the light source bulbs mounted to each of the bulb mounting parts toward a heat-sensitive plate making surface, that is, Some are equipped with a lamp house, which is, for example, Japanese Utility Model Publication 57-15814.
It is shown in the publication.

[Problems to be Solved by the Invention] The reflecting mirror in the lamp house as described above requires a required amount of light on the heat-sensitive plate making surface when all the light source bulbs respectively attached to all of the plurality of bulb attachment portions emit light. Distribution characteristics,
In many cases, in order to obtain a uniform distribution characteristic, the valve mounting portions are provided so as to include all of the plurality of valve mounting portions so as to surround them, and their shapes and the like are set.

In the lamp house having the above-described structure, the required light quantity and its distribution characteristics are obtained on the thermosensitive plate making surface only after the light source bulbs respectively attached to all of the plurality of bulb attachment portions emit light. Even if a light source bulb attached only to a part of a plurality of bulb mounting parts emits light, the light rays emitted by the light source bulb are diffused by a reflecting mirror over a wide area of the heat sensitive plate making surface. The required amount of light cannot be obtained, and predetermined heat-sensitive plate making cannot be performed.

Therefore, in the case where the heat-sensitive plate making size is, for example, B5 plate size, half of the postcard size is made, or when the postcard size is made smaller than that, the heat-sensitive plate making is carried out. In the case where the required light irradiation area can be obtained by mounting the light source bulb only on a part of the plurality of bulb mounting parts provided in the lamp house, from the light irradiation area required for In addition, it is necessary to attach light source bulbs to all of the plurality of bulb attachment portions to emit light. This increases the economical burden on the user when the light source bulb is a disposable one-shot flash.

In view of the above-mentioned problems, the present invention provides a bulb for a light source, which is attached only to a part of the bulb mounting portions of a plurality of bulb mounting portions provided in the lamp house when a plate size smaller than a normal size is produced. It is an object of the present invention to provide an attachment for a lamp housing, which can obtain a required amount of light on the heat-sensitive plate making surface by the light emission of, and enables a predetermined heat-sensitive plate making.

[Means for Solving the Problems] According to the present invention, a plurality of bulb mounting portions to which light source bulbs can be individually mounted and all of the plurality of bulb mounting portions are provided. A heat-sensitive device having a reflecting mirror arranged so as to surround the heat-sensitive plate-making surface so that a required light amount distribution characteristic can be obtained when all of the light source bulbs respectively mounted on all of the plurality of bulb mounting parts emit light. As an attachment used in a light irradiating device of a plate type plate making apparatus, an engaging pin that is inserted in place of a valve is attached to at least one of the plurality of bulb mounting portions, and is detachably attached to the reflector. When a bulb for a light source mounted only on a part of the plurality of bulb mounting parts emits light, it cooperates with a part of the reflecting mirror to obtain a required light amount distribution characteristic on a part of the thermosensitive plate making surface. You can get Achieved by an attachment with a reflective surface that makes it look like.

[Operation and Effect of the Invention] According to the above configuration, when the valves are attached only to a part of the plurality of valve attachment portions and the thermosensitive plate making apparatus is operated only for a part of the size of the thermosensitive plate making surface, By effectively utilizing the valve mounting part where the valve cannot be mounted and inserting the engagement pin of the attachment in place of the valve, a part of the heat-sensitive plate-making surface is formed by the part of the reflecting mirror and the reflecting surface of the attachment. In this case, the light quantity distribution characteristic on the heat-sensitive plate making surface can be made preferable only when the heat-sensitive plate making is carried out.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. 1 and 2 show one embodiment of a heat-sensitive plate making apparatus including a light beam irradiation apparatus to which an attachment according to the present invention is attached. In the figure, 10 is a base, and 20 is a movable pressing plate.
One end of 0 is pivotally connected to the base 10 by a pivot 22. On the base 10, there is provided a document placing base 12 made of sponge or the like and having a cushioning property.

The movable pressing plate 20 is provided with a lamp housing mounting opening 24, and a transparent stage glass 26 is mounted on the movable pressing plate 20 side of the opening. Movable pressing plate 2
A base paper holder 28 for holding the stencil paper S is provided on the surface of the base plate 0 facing the base 10.

The lamp house 30 is detachably fitted and fitted into the lamp house mounting opening 24. The lamp house 30 is in the form of a box having an opening on the side of the stage glass 26, and has a plurality of, in the illustrated embodiment, two light source bulb mounting portions 32 and 34 therein. There is.

The two light source bulb mounting portions 32 and 34 engage with an electrode member 38 having a socket hole 36 into which the socket portion Vs of the light source bulb V also serving as an electrode is inserted, and an electrode Ve of the light source bulb V. It has a springy electrode member 40.

Inside the lamp housing 30, a reflector 42 is attached by screws 42.
4 is fixedly installed. The reflecting mirror 44 is made of a metal thin plate having excellent light reflectivity, such as a stainless thin plate,
It is arranged so as to include both of the two light source bulb mounting portions 32 and 34 and surround the light source bulb to be mounted thereto, and the light source bulb V is provided in both of the bulb mounting portions 32 and 34.
The shape including the inclination degree is set so that a predetermined light quantity and light quantity distribution characteristic can be obtained on the heat-sensitive plate making surface, that is, the stage glass surface when all the two light source bulbs V emit light.

At the bottom (ceiling) of the reflecting mirror 44, bulb insertion openings 46 and 4 are provided corresponding to the light source bulb mounting portions 32 and 34, respectively.
And 8 are provided.

An attachment according to the present invention is designated by 50 in the figure. The attachment 50 is a metallic reflector plate 5.
2 and a knob portion 54 for attachment and detachment attached to the reflection plate 52 and an engagement pin 56. The engagement pin 56 is inserted into and removed from the valve insertion opening 46 or 48 provided in the reflection mirror 44. The reflection plate 50 is detachably attached to the reflection mirror 44 by fitting as much as possible. The reflection plate 50 is provided with one of the valve insertion openings 48 by the engagement pin 56.
When the light source bulb V mounted on the light source bulb mounting portion 32 emits light through the other bulb insertion opening 46, it is required to work in cooperation with the reflecting mirror 44 on the heat-sensitive plate making surface. Reflective surface 5 for obtaining light quantity distribution characteristics
8 is provided on the side of the valve insertion opening 46.

Light source bulb mounting portion 32 for normal size heat-sensitive plate making
In the case where the light source bulb V is attached to any of the Nos. 34 and 34 to perform the heat-sensitive plate making, the attachment 50 may be detached from the lamp house 30 as in the conventional case.

As shown in FIG. 1, when heat-sensitive plate making of a document A smaller than the normal size is performed, the engagement pin 56 of the attachment 50 is inserted into one valve insertion opening 48 to attach the attachment 50. It may be mounted on the inside of the reflecting mirror 44, and only one light source bulb is attached to the light source bulb attachment portion 32 from the other bulb insertion opening 46, and this may be issued.

Light rays emitted by the light source bulb V attached only to the one light source bulb attachment portion 32 are reflected by a part of the reflection mirror 44 and the reflection surface 58 of the attachment 50 so that about half of the surface of the stage glass 26 is exposed. Then, the heat-sensitive plate-making is performed on the corresponding surface portion.

[Brief description of drawings]

FIG. 1 is a side view showing a partial cross-section of one embodiment of a light beam irradiation apparatus and a heat-sensitive plate making apparatus to which the attachment according to the present invention is applied, and FIG. 2 is an attachment and a light beam irradiation apparatus (lamp house) according to the present invention. It is an exploded perspective view showing one example. 10 ... Base, 12 ... Original placing table, 20 ... Movable pressing plate, 2
2 ... Axis, 24 ... Lamp house mounting opening, 26 ... Stage glass, 28 ... Base paper holder, 30 ... Lamp house,
32, 34 ... Light source bulb mounting portion, 36 ... Socket hole,
38, 40 ... Electrode member, 42 ... Screw, 44 ... Reflecting mirror, 4
6, 48 ... Valve insertion opening, 50 ... Attachment,
52 ... Reflector, 54 ... Knob, 56 ... Engagement pin, 58
… Reflective surface.

Claims (1)

[Scope of utility model registration request] 1. A plurality of bulb mounting portions to which light source bulbs are individually mounted, respectively, and a plurality of bulb mounting portions are surrounded and enclosed, and are mounted to all of the plurality of bulb mounting portions. And a plurality of the above-mentioned plurality of attachments, which are used in a light-irradiating device of a heat-sensitive plate-making apparatus having a reflecting mirror arranged so that a required light quantity distribution characteristic can be obtained on the entire heat-sensitive plate-making surface when all the light source bulbs emit light. At least one of the valve mounting portions has an engaging pin that is inserted instead of the valve, is detachably attached to the reflecting mirror, and is attached only to a part of the plurality of valve mounting portions. An attachment having a reflecting surface that cooperates with a part of the reflecting mirror when the light source bulb emits light so that a desired light quantity distribution characteristic is obtained on a part of the thermosensitive plate making surface.