JPH03112051A - How to join the reflector and lamp - Google Patents

Abstract

PURPOSE:To improve connecting workability by horizontally holding a lamp stored in a reflecting mirror in coincidence with the optical axis, filling an adhesive through the opening on the back of the reflecting mirror, and filling it while the reflecting mirror is reversed centering the optical axis. CONSTITUTION:A reflecting mirror 1 is horizontally held so as to keep the center axis O-O nearly horizontal, and a lamp 10 is stored in the reflecting mirror 1. The lamp 10 is horizontally held so that the lamp axis coincides with the optical axis, and a sealing section 12 is inserted into the fitting hole 5 of the reflecting mirror 1. The tip of an adhesive injection needle 20 is inserted through the back opening section 6 of the cylinder section 4 of the reflecting mirror 1, and a preset quantity of a heat-resistant inorganic adhesive 15 is filled. The reflecting mirror 1 and the lamp 10 are reversed upside down centering the optical axis O-O while the horizontal attitude is kept. A preset quantity of the adhesive 15 is filled through the adhesive injection needle 20. Connection workability can be improved.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention relates to a method for injecting an adhesive when a reflecting mirror and a lamp housed in the reflecting mirror are bonded using an adhesive. .

(Prior Art) In movie projectors, projector devices, and the like, a mirrored lamp in which a reflecting mirror and a lamp are integrally joined is used as a light source.

This lamp with a mirror houses a lamp such as a halogen bulb in a reflecting mirror that has a rotationally quadratic curved surface and is formed with a dichroic film that reflects only a specific wavelength, and the end of this lamp is formed on the back surface of the reflecting mirror. For the cylindrical mounting, insert a heat-resistant inorganic adhesive mainly composed of metal oxides such as alumina, silica, magnesia, or zirconia between the end of the lamp and the inner surface of the hole for the above mounting. The lamp is fixed to a reflecting mirror.

As a result, the light emitting center of the halogen bulb is aligned with the focus position of the reflecting mirror, and the bulb is integrated, so that it can be handled as a tll-product that is a combination of a lamp and a mirror.

By the way, when joining such a reflector and lamp,
In the above installation, adhesive is injected between the inner surface of the hole and the end of the lamp, and this adhesive is dried and hardened to fix both parts. However, this adhesive filling process is performed using the following conventional method. had been adopted.

In other words, conventionally, the central axis and optical axis of the reflector were oriented vertically so that the front opening of the reflector faced upward, and when the reflector was mounted on the back side, the lower end opening of the hole was closed with a blockage paper to prevent liquid dripping. Take precautions.

A lamp is inserted through the upward opening of the reflector, and the end of the lamp is inserted into the mounting hole. In this state, the light emitting center of the lamp and the focal point of the reflector are aligned, and then an adhesive injection needle held by the worker is inserted into the upward opening of the reflector, and the injection needle is passed through the end of the lamp. For installation, inject adhesive between the inner surface of the hole and the inner surface of the hole.

In this case, in order to fill the gap between the lamp and the mounting hole with the adhesive so that it spreads throughout the hole, the lamp and the mounting hole are injected with the above adhesive in two separate places in the gap between the hole. are doing.

When such injection work is completed, hot air is sent from the upward opening side of the reflecting mirror and the downward opening side of the mounting hole to dry the adhesive.

When the adhesive dries and hardens, the work is completed by peeling off the drip prevention paper 11- that was previously applied.

(Problem to be Solved by the Invention) However, in the above conventional method, the adhesive is injected from above with the bottom opening of the hole facing downward, so the injected adhesive is prevented from dripping. It is necessary to apply a sealing paper, and it is necessary to peel it off after the adhesive has hardened, which requires time and effort.

In addition, with this method, the worker holds the adhesive injection needle through the upward opening of the reflector and inserts it into the gap in the hole, so if adhesive drips from the tip of the injection needle during insertion, it will reflect There is a risk of it falling on the surface.

In particular, when injecting adhesive into the gap between the lamp and the mounting hole, the adhesive is injected twice in two places in order to fill the entire gap, and at this time the injection needle is replaced and When transferring the injection needle, adhesive often drips from the tip of the injection needle, and this dripped adhesive falls onto the reflective surface.

It is troublesome to remove the adhesive dropped onto the reflective surface in this way, and if even a small amount of adhesive remains, the reflective surface is contaminated and the reflective performance is degraded.

Furthermore, the method of inserting the adhesive injection needle through the upward opening of the reflector does not have good workability and is difficult to automate because the gap between the lamp and the mounting hole is small.

The present invention aims to provide a method for joining a reflecting mirror and a lamp that does not require pasting or peeling off a blocking paper to prevent dripping, and does not require adhesive to adhere to the reflecting surface, and is highly workable. It is something.

[Structure of the Invention] (Means for Solving the Problems) The present invention maintains a reflecting mirror horizontally so that the optical axis of the reflecting mirror is substantially horizontal, and a lamp housed in the reflecting mirror is Hold it horizontally with the axis aligned with the optical axis, and for the above installation, insert an adhesive injection needle from the back side opening of the hole almost along the optical axis, and after injecting a predetermined amount of adhesive from this injection needle, The present invention is characterized in that the reflecting mirror and the lamp are turned upside down about the optical axis while they are still facing sideways, and in this state, a predetermined amount of adhesive is further injected from the adhesive injection needle.

(Function) According to the present invention, when installing a reflector lying on its side, an adhesive injection needle is inserted from the back side opening of the hole and adhesive is filled from this adhesive injection needle, so that the reflection of the reflector is The adhesive does not adhere to the surface, and after injecting a portion of the adhesive from the injection needle, the reflector and lamp are turned upside down and the remaining adhesive is injected, so installation is possible on the inner surface of the hole. The adhesive is evenly distributed in the gap between the lamp and the lamp, and there is no variation in adhesive strength. Furthermore, automation is possible because the reflector and lamp are simply turned upside down during injection.

(Example) The present invention will be described below based on an example shown in the drawings.

In the figure, reference numeral 1 denotes a reflecting mirror consisting of a rotational quadratic curved surface, and this reflecting mirror 1 is formed with a reflecting surface 2 made of, for example, a dichroic film, and has a light emitting port 3 on the front side and on the back side. A rectangular cylinder portion 4 is integrally provided in a protruding manner. This cylindrical portion 4 has a mounting hole 5 open to the reflective surface 2 side, and an opening 6 smaller than the cross section of the cylindrical portion 4 is formed in the rear wall.

Reference numeral 10 designates a halogen light bulb as a lamp, and a crushed sealing portion 12 is formed at one end of a quartz bulb 11, from which a pair of terminal pins 13a and 13b are led out. These terminal pins 13a, 13b are connected to the valve 1.
It is connected to the filament 14 housed in the filament 1, and is also connected to an external power source via a socket (not shown) or the like.

Such a halogen light bulb 10 is housed in the reflecting mirror 1, and its sealing part 12 is inserted into the hole 5 and bonded with an adhesive 15.

The adhesive 15 is a heat-resistant inorganic adhesive containing a metal oxide such as alumina, silica, magnesia, or zirconia as a main component and using water as a binder, such as Sumiceram or BondX (both trade names). When used, the sealing part 12 of the halogen bulb 10 and the mounting are filled into the gap between the inner surface of the hole 5 and the lamp 10 and the reflector ml are integrally joined.

When joining the reflecting mirror 1 and the halogen bulb 10 as described above, the following method is adopted for filling the hole 5 with the adhesive 15 for attachment.

That is, as shown in FIG. 1, the reflector 1 is held horizontally so that its center axis (-axis 0-0) is substantially horizontal, and the lamp 10 is housed in the reflector 1. lamp 1
0 is placed horizontally so that the lamp axis coincides with the optical axis, and the seal I
The J2 part 12 is inserted into the hole 5 for attaching the reflector 'v11.

In this case, as shown in FIG. 2, since the hole 5 has a rectangular cross section, the reflector 1 is held with its long side facing up and down, and the lamp 10 is crushed and sealed. Since the sealing part 12 has a flat shape, its longitudinal direction is oriented in the vertical direction, and therefore, of the pair of terminal pins 13a and 13b led out from the sealing part 12, one 13a is located on the top and the other 13b is located on the top. The robot is supported in a position that is located at the top.

In this state, the position is adjusted (focus adjustment) so that the light emission center of the halogen bulb 10, that is, the center of the filament 14, is aligned with the focal position of the reflecting mirror 1.

Then, insert the tip of the adhesive injection needle 20 connected to the adhesive supply device through the back opening 6 of the cylindrical portion 4 of the reflecting mirror 1,
This tip opening is arranged at the optical axis O-O position of the reflecting mirror 1, that is, between the terminal pins 13a and 13b located above and below.

In this state, from the adhesive injection needle 20, for example, a viscosity of 3200
Injection of the heat-resistant inorganic adhesive 15 at a temperature of 0 to 42,000 cps/25°C is started.

During injection of the adhesive 15, the adhesive 15 discharged from the injection needle 20 hits the bottom surface of the crushed sealing part 12 of the lamp 10 and hangs downward due to its own weight, and the sealing part 12 and the mounting hole 5 are connected to each other. It goes around to the lower space in the gap between.

An amount of adhesive 15 corresponding to approximately half of the amount of adhesive to be filled in the final step is supplied, and when the adhesive has sufficiently wrapped around the lower space of the gap and the adhesive 15 has not yet hardened, the adhesive is bonded. With the agent injection needle 20 inserted, the reflecting mirror 1 and the lamp 10 are kept in a horizontal position and are turned upside down about the optical axis OO as shown in FIG. 3.

In this state, as can be seen from Fig. 4, the terminal pin 13
The positions of a and 13b are also reversed.

Then, in this state, the remaining predetermined amount of adhesive 15 is further injected from the adhesive injection needle 20.

The adhesive 15 discharged from the injection needle 20 is applied to the crushing sealing part 12
The sealing part 12 and the mounting part 12 hangs downward due to their own weight, and the sealing part 12 and the mounting part wrap around into the side space in the gap between the hole 5 and the hole 5.

As a result, the adhesive 15 filled first fills the upper space, and the adhesive 15 injected later fills the lower space, so that the sealing part 12 of the lamp 10 and the reflecting mirror 1 can be attached to the hole 5. The entire gap between the two is filled with adhesive 15.

After filling a predetermined amount of the adhesive 15 in this way, the adhesive injection needle 20 is left as it is for a while until the adhesive 15 remaining in the injection needle 20 no longer drips. Wait, and then pull out this injection needle 20.

When such injection work is completed, warm air is sent from the front opening 3 side of the reflecting mirror 1 and the rear opening 6 of the mounting hole 5, respectively, and the hot air is directed to the surface of the adhesive 15 facing both sides. Apply it and force it to dry.

This drying hardens the adhesive 15 and increases the adhesive strength, so that the reflecting mirror 1 and the lamp 10 are joined together.

Note that, at this time, a depression may be formed in the adhesive near the center of the opening 6 where the injection needle 20 was located, but the slight depression does not affect the appearance.

Further, if a deep depression is formed, the injection needle 20 may be pulled out while discharging the adhesive 15 from the injection needle 20.

In addition, we consider the purpose of the adhesive, such as its composition, viscosity, curing speed, thixotropy, injection needle diameter, and discharge pressure, in order to automate the adhesive injection process and to prevent it from flowing out of the designated areas. Needless to say, choose the most suitable adhesive depending on the application.

According to this method, the adhesive does not drip from the hole 5 during installation, so there is no need to attach a blocking paper to prevent dripping or to peel it off after the adhesive has hardened, as in the conventional method. No work required.

In addition, since the adhesive injection needle 20 is inserted through the rear opening 6 of the hole 5, the adhesive will not drip onto the reflective surface 2 of the reflective mirror 1, preventing the reflective surface 2 from becoming dirty and improving its reflective properties. There is no longer any decrease in

Then, attach the adhesive injection needle 20 to the back opening 6 of the hole 5.
Since the injection needle 20 is inserted from the top, the injection needle 20 can be easily inserted because the opening is wide, and a predetermined amount of adhesive can be injected in a short time, thereby shortening the injection work.

Furthermore, when filling the adhesive 15 with the adhesive injection needle 20, the reflecting mirror 1 and the lamp 10 are inverted so that the adhesive spreads over the entire gap, so there is no need to replace the injection needle. First, automation is easy because it is only necessary to reverse the reflector 1 and lamp 10.

In addition, although the said Example demonstrated the case where the halogen light bulb 10 was joined to the reflective mirror 1, this invention is not limited to this.

For example, the lamp is not limited to a halogen bulb, but may also be an ordinary incandescent bulb, a wedge-base bulb, or a discharge lamp, and the reflector may be a cold mirror other than a dichroic film or an ordinary mirror made of aluminum. It is possible.

[Effects of the Invention] As explained above, according to the present invention, when attaching a reflecting mirror lying on its side, an adhesive injection needle is inserted through the opening on the back side of the hole, and adhesive is filled from the adhesive injection needle. This prevents adhesive from adhering to the reflective surface of the reflector, and after injecting a portion of the adhesive from the injection needle, the reflector and lamp are turned upside down and the remaining adhesive is injected. During installation, the adhesive spreads evenly over the gap between the inner surface of the hole and the lamp, so there is no variation in adhesive strength. Another advantage is that automation is possible because the reflector and lamp are simply turned upside down during injection.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a sectional view for explaining the working situation in the first half of the adhesive injection process, and FIG. 2 is a view taken along the line ■-■ in FIG. Figure 3 is a cross-sectional view to explain the work situation in the latter half of the adhesive injection process, and Figure 4 is a cross-sectional view of the third half of the adhesive injection process.
It is an arrow view of the IV-IV line in the figure. 1... Reflector, 4... Cylindrical part, 5... Mounting hole, 1
0...Halogen light bulb, 12...Sealing part, 15...
Inorganic adhesive, 20...Adhesive injection needle.

Claims (1)

[Claims] A method for joining a reflector and a lamp, in which a lamp is accommodated in a reflector having a mounting hole formed on its back surface, and an end of the lamp is inserted into the mounting hole and fixed with adhesive. Hold the mirror sideways so that the optical axis of this reflecting mirror is almost horizontal, hold the lamp housed in this reflecting mirror sideways with the lamp axis aligned with the optical axis, and place the lamp on the back side of the above mounting hole. Insert an adhesive injection needle through the opening approximately along the optical axis, and after injecting a predetermined amount of adhesive from the injection needle, turn the reflecting mirror and lamp upside down about the optical axis while keeping them sideways. A method for joining a reflecting mirror and a lamp, characterized in that a predetermined amount of adhesive is further injected from the adhesive injection needle in the above-mentioned state.