JPH0112247Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hot air device for eyeglass processing, which is used when fitting an eyeglass lens into an eyeglass frame and adjusting the fitting of the eyeglass frame onto the face.

[Conventional technology]

Hot air equipment for eyeglass processing is used to adjust the shape of eyeglass frames such as twists and distortions that occur during product display or processing, or to adjust the fitting to the face when inserting eyeglass lenses into plastic eyeglass frames. In this method, the adjustment part of the eyeglass frame is heated, the adjustment part becomes thermally deformable and becomes elastic and easy to process, and manual correction is performed to correct and adjust the fitting of the eyeglass frame. Using.

Conventional hot air equipment for eyeglass processing consists of a heating chamber for correcting eyeglass frames, and a heating and blowing device for sending hot air into the heating chamber.The heating device uses a nichrome wire or the like as a heat source. , the temperature is maintained at a constant temperature using a temperature adjustment mechanism. In addition, the power to the device was turned on and off by manual switch operation.

[Problem that the invention attempts to solve]

In conventional hot air apparatuses for eyeglass processing, it takes a certain amount of time to heat a plastic eyeglass frame to a temperature above the thermal deformation temperature, so the eyeglass frame may be left in the heating chamber for a certain period of time. At this time, there was a problem that if the glasses bay was left for a predetermined period of time or longer, problems such as thermal deformation and breakage of the glasses frame may occur due to overheating. Further, in the conventional device, since the device itself is heated by a heat source, there are problems in terms of economy or safety, and the above-mentioned problem becomes particularly noticeable if the device forgets to turn off the power.
Furthermore, in order to obtain a comfortable wearing experience, the fitting adjustment is performed on the rim of the eyeglass frame, the temple,
It is necessary to repeat the adjustment operation several times for each part such as the parts, and there is a problem that the power switch must be left on or the power switch of the device must be turned on and off for each adjustment. Ta. In particular, since the adjustment work is done manually while holding the eyeglass frame, frequent switch operations reduce work efficiency.

This invention was developed to solve the above-mentioned problems, and the heating response of the heating chamber is good, there is no abnormal heating even if the eyeglass frame is left in the heating chamber, and the device does not have to be turned on and off frequently. To provide a hot air device for eyeglass processing which can straighten eyeglass frames and is excellent in work that does not require.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a hot air apparatus for eyeglass processing having a heating chamber for adjusting eyeglass frames. an air blower that blows warmed air; an eyeglass frame detection device that detects the presence or absence of an eyeglass frame in the heating chamber; and when the eyeglass frame detection device detects an eyeglass frame, the heat generating device and the air blower A hot air device for processing eyeglasses is characterized in that it has a control device that operates for a certain period of time.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a circuit diagram showing an embodiment of the hot air device for processing eyeglasses of the present invention, and FIG. 2 is a sectional view of the same embodiment.

In FIG. 2, reference numeral 1 denotes a heating chamber in which hot air from a hot air outlet 2 is used to correct eyeglass frames and fit them onto the face. Reference numeral 3 denotes a heat generating device, which is composed of a heating element ceramic made of a barium titanate-based semiconductor in a honeycomb structure. Reference numeral 4 denotes a blower device, which is composed of a Sirotskov fan driven by a motor M. Q ₁ is an infrared light emitting diode, Q ₂ is a phototransistor,
It forms part of an eyeglass frame detection circuit that detects the presence or absence of an eyeglass frame. Reference numeral 10 denotes a control circuit section, which will be explained in detail with reference to FIG.

The control circuit section 10 includes an eyeglass frame detection circuit 20, a shaping circuit 30, a timer circuit 40, a switch circuit 50,
It consists of a power supply circuit 60 and the like.

First, regarding the case where the eyeglass frame is not in heating chamber 1,
The structure and function will be explained. When there is no eyeglass frame, the light emitting diode Q ₁ of the eyeglass frame detection circuit 20
Since there is no barrier between the light emitting diode Q1 and the phototransistor _Q2 , the infrared light from the light emitting diode _Q1 enters the phototransistor _Q2 . Therefore, phototransistor Q ₂ is turned on, and transistor Q ₃ is turned on.
Turn on and set the collector potential to L level.
Then, the L level is input to one side of the NAND circuit _Q4 of the shaping circuit 30. Therefore, the output of the NAND circuit _Q4 , which is the input to the timer circuit 40, becomes H level, and the timer circuit 40 does not operate. And the transistor of the switch circuit 50
Q ₉ is OFF, relay RY does not operate, and heat generating device 3 directly connected to triax Q ₁₀ also does not operate.

Next, a case where an eyeglass frame is inserted into the heating chamber 1 will be described. When the eyeglass frame is inserted, the infrared light from the light emitting diode _Q1 of the eyeglass frame detection circuit 20 is blocked and does not enter the phototransistor _Q2 .
Turn off phototransistor _Q2 and set the collector of transistor _Q3 to H level. For this reason,
One input of the NAND circuit _Q4 of the shaping circuit 30 is H
The other inputs are inputted via the integrating circuit and inverter _Q5 , and the NAMD circuit _Q4 outputs a pulsed L level. Therefore, timer circuit 4
0 timer ICQ ₇ is activated and the inverter
Transistor _Q8 is turned on via _Q6 to discharge the charge in capacitor _C1 . Then, the output of timer ICQ ₇ becomes H level, turning on transistor Q ₉ of switch circuit 50 and turning on relay RY.
As a result, the triax Q ₁₀ is also turned on, and the motors M of the heat generating device 3 and the hot air device 4 are also turned on. Furthermore, since the timer ICQ ₇ is activated by the time constant of the time constant circuit made up of the resistor R ₁ and the capacitor C ₁ of the timer circuit 40, the transistor
Turn off Q ₉ and turn off relay RY. This allows the motor M of the heat generating device 3 and the blower device 4 to
Turn it off.

That is, the heating element ceramic of the heating device 3, which is made of a barium titanate semiconductor with a honeycomb structure, has a large inrush current and rapidly heats itself and quickly rises in temperature as a heat source, so it softens the eyeglass frame. quickly reaches the required temperature. The temperature of the heating chamber can be lowered by increasing the amount of air from the blower.
By limiting the temperature to around 135° C. and increasing the amount of air from the blower 4, the heat capacity is increased and the size of the eyeglass frame does not affect the temperature.
Furthermore, the light emitting diode of the eyeglass frame detection circuit 20
By inserting the eyeglass frame into the hot air outlet of the heating chamber 1 using _Q1 and the phototransistor _Q2 , the heat generating device 3 etc. are automatically activated, and the eyeglass frame is placed between the light emitting diode _Q1 and the phototransistor _Q2 . The heat generating device 3, etc., maintains its operating state while the vertical movement across the area is performed. Then, remove the eyeglass frame from the heating chamber 1, or
Alternatively, if you leave the eyeglass frame in the heating chamber, the heat generating device 3 etc. will automatically turn on after a certain period of time.
Turn it off.

Plastic eyeglass frames are usually made of celluloid, acetate, propionate, etc., and the heat distortion temperatures of these materials are 60° to 71°C, 44° to 90°C, and 44° to 109°C, respectively. When processing eyeglass frames, the melting temperature must be lower than the melting temperature of these materials. According to this embodiment, the temperature of the heating chamber can be set to approximately 135° C., and the temperature can be quickly lowered to below the melting temperature while being above the thermal deformation temperature, which speeds up the softening of the eyeglass frame and improves the efficiency of adjustment work. . In addition, the heat generating device can be put into operation by moving the eyeglass frame up and down between the light emitting diode and the phototransistor in the heating chamber without the need to switch the power source of the heat generating device. Even if you forget to turn it off or leave the eyeglass frame in the heating chamber, it is safe because the heat generating device automatically stops after a predetermined period of time.

[Effects of the Invention] According to the present invention, when adjusting an eyeglass frame, since the heating chamber has good heating response characteristics, the eyeglass frame can be quickly softened even if there are many adjustment points, and work efficiency can be improved. Further, even if the eyeglass frame is left in the heating chamber, there is no need to worry about abnormal heating, and unnecessary thermal deformation and damage to the eyeglass frame can be prevented. Furthermore, the eyeglass frames can be continuously adjusted without frequent switch operations, and the heating device stops after a certain period of time has passed after the work is completed, so it is possible to improve work efficiency and safety.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a control circuit section of an embodiment of a hot air device for processing eyeglass frames according to the present invention. FIG. 2 is a cross-sectional view of the same embodiment. Explanation of symbols, 1... Heating chamber, 3... Heat generating device,
4...Blower device, 10...Control circuit section, 20...
Eyeglass frame detection circuit, 30... shaping circuit, 40... timer circuit, 50... switch circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] A hot air device for eyeglass processing having a heating chamber for adjusting eyeglass frames, comprising: a heating device having a heating element ceramic formed of a semiconductor heater; and a heating device heated by the heating device. an air blower that blows heated air; an eyeglass frame detection device that detects the presence or absence of an eyeglass frame in the heating chamber; A hot air device for processing eyeglasses, comprising: a control device that operates over a period of time;