JPH10277902A - Lens grinding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a switch operation of a machine worker by providing a command signal means for inputting a signal for commanding an action of a device in an opening/closing cover of a machining chamber for performing grinding work. SOLUTION: After inputting machining conditions a machine worker opens a cover 12 with his left hand, while holding a lens to be machined to which a fixed cup is fitted with his right hand so as to install the base part of the fixed cup to a cup receiver fitted to a lens rotary shaft side. Successively, a command for moving the lens rotary shaft in the axial direction is inputted by a switch provided in the cover 12 so as to chuck the lens to be machined. In a case where the lens to be machined is required to be held in such a state as not being fallen from a cup receiver, the machine worker can operate the switch provided in the cover 12 with his left hand so as to operate the machine smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding apparatus for grinding a spectacle lens to fit a spectacle frame.

[0002]

2. Description of the Related Art As a lens grinding apparatus of this kind,
As shown in FIG. 9, the lens to be processed is chucked by two lens rotating shafts 150a and 150b, and the processing is performed while the lens to be processed is pressed against a grinding grindstone 152 which is rotated by a rotation operation of a carriage 151 holding the lens. Such is known. Processing room 154 during processing
The cover 155 is closed to prevent the grinding water and the dusting powder supplied around the lens grinding surface from scattering to the outside.

When processing is performed by an apparatus as shown in FIG. 9, a switch 161 provided on an operation panel section 160 is pressed, and the lens rotating shaft 150b is moved toward the lens rotating shaft 150a to chuck the lens to be processed. After the lens to be processed is chucked, the cover 55 is closed, and then the processing is started by pressing the start switch 162 provided on the operation panel section 160. After processing is completed, work is performed in the reverse order to remove the processed lens.

[0004]

However, when the mounting of the cup receiver on the lens rotating shaft 150a side and the base of the fixed cup fixed to the lens to be processed is shallow, the processing is performed so that the lens does not fall off during chucking. It is necessary to open and close the lens rotating shaft 1b while holding the lens to be processed by hand. Normally, the operator holds and removes the lens to be processed while holding it with the right hand, but in order to operate the switch of the operation panel section 160, release the left hand used to open and close the cover, and hold the lens holding the lens with the right hand. After changing from to the left hand, the switch must be operated with the right hand. As described above, there is a problem in that the switch operation by switching the lens to be processed is troublesome, and the working efficiency is poor.

[0005] Further, if the user does not notice the state in which the cover 155 is kept open or forgets to close the cover 155 and starts working, there is a problem that grinding water and cutting powder scatter outside.

The present invention has been made in view of the above-mentioned problems of the conventional apparatus,
It is an object of the present invention to provide a device which can simplify a switch operation of a processor and improve work efficiency.

[0007]

Means for Solving the Problems In order to solve the above problems, the present invention is characterized by having the following configuration.

(1) In a lens grinding apparatus for grinding a lens to be processed so as to conform to the shape of a spectacle frame, an opening / closing cover of a processing chamber for performing lens grinding processing, wherein a processing operator performs opening and closing operations with a hand. And a command signal input means for inputting a signal for commanding the operation of the device provided on the cover.

(2) In the lens grinding apparatus of (1), the signal inputted by the command signal input means is a command signal for starting chucking of a lens rotating shaft for chucking a lens to be processed. .

(3) In the lens grinding apparatus of (1), the command signal input means is an operation switch operated by a processor, and the operation switch is manually operated when the operator performs the opening / closing operation of the opening / closing cover. Is disposed in the vicinity of the position where.

(4) The lens grinding apparatus according to (1), further comprising holding means for holding the open state of the open / close cover, wherein the command signal input means is connected to the open / close cover held by the hold means. And a detecting means for detecting that a predetermined operation has been performed.

(5) In a lens grinding apparatus for grinding a lens to be processed so as to conform to the shape of an eyeglass frame, an opening / closing cover of a processing chamber for performing lens grinding processing, wherein a processing operator performs opening and closing operations with a hand. An opening / closing cover to be performed, a detecting means for detecting the opening / closing state of the opening / closing cover, and a control for inhibiting or stopping the execution of the processing operation of the apparatus when it is detected that the opening / closing cover is open based on the detection result. Means.

(6) In the lens grinding apparatus of (5), there is provided data input means for inputting data necessary for starting the processing of the lens to be processed, and the control means is configured such that the detection means includes the opening / closing cover. When it is detected that the apparatus has been closed from the open state, it is necessary to confirm that predetermined processing start conditions have been input by the data input means and to execute the processing operation of the apparatus. Features.

(7) In a lens grinding apparatus for grinding a lens to be processed so as to conform to the shape of a spectacle frame, a lens axis opposite to a lens axis provided with a cup receiver among left and right lens axes for chucking the lens to be processed. That the chucking start switch is provided at a position where both hands do not intersect when the chucking start switch is operated with the hand opposite the hand supporting the lens to be processed and the hand supporting the lens to be processed. Features.

[0015]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1A is a schematic external view of the apparatus of the embodiment, and FIG. 1B is a perspective view showing the internal configuration of the apparatus.

Reference numeral 10 denotes an apparatus main body, 11 denotes a processing chamber for grinding a lens to be processed, 12 denotes a cover of the processing chamber 11, and rotates around a support shaft 120 as indicated by an arrow. Performs the opening and closing operation while holding the front of the cover 12 by hand. On the front side of the cover 12, there is provided a switch 13 for inputting a command for opening / closing operation of lens rotating shafts 704a and 704b, which will be described later. The switch 13 does not necessarily have to be provided on the cover 12, but may be in any position as long as it can be easily operated with the opposite hand of the hand holding the lens to be processed. Reference numeral 14 denotes a sensor that detects the open / closed state of the cover 12. Reference numeral 2 denotes an eyeglass frame shape measuring unit built in the upper part of the apparatus main body, and can obtain three-dimensional shape data of the eyeglass frame shape and the template. Reference numeral 3 denotes a display unit for displaying measurement results and various information, and 4 denotes an operation panel unit for inputting data and inputting instructions to the apparatus.

In FIG. 1B, reference numeral 60 denotes a grindstone group, which comprises a rough grindstone 60a for a glass lens, a rough grindstone 60b for a plastic, a finish grindstone 60c for beveling and flat machining, and a grindstone 60d for a mirror-finished surface. These grindstone groups 60 are rotatably mounted on a rotating shaft 61 a of a spindle unit 61 fixed to the base 1. Reference numeral 65 denotes an AC motor for rotating the grindstone, whose rotation is transmitted to the grindstone group 60 via a pulley 63, a belt 64, and a pulley 66 attached to the rotating shaft 61a.

Reference numeral 70 denotes a carriage, and 700 denotes a carriage. Reference numeral 5 denotes a lens shape measuring unit that measures the edge position of the lens to be processed.

<Structure of Main Parts> Next, the structure of main parts of the apparatus will be described.

(A) Carriage Unit The structure will be described with reference to FIGS. 1B to 3. FIG. 2 is a cross-sectional view of the carriage, and FIG. 3 is an arrow A view showing a driving mechanism of the carriage.

A carriage shaft 702 is rotatably supported on a shaft 701 fixed to the base 1, and a carriage 700 is rotatably supported on the carriage shaft 702. Lens rotation shafts 704a and 704b are coaxially and rotatably supported on the carriage 700 in parallel with the shaft 701. The lens rotation shaft 704b is the rack 7
05, and the rack 705 is rotatably supported by the motor 70.
6 can be moved in the axial direction by a pinion 707 fixed to the rotation axis of the lens 6, thereby the lens rotation axis 704 b
Can be opened and closed by being moved in the axial direction, and the lens to be processed can be held between the lens rotating shafts 704a and 704b. In addition,
A cup receiver 740 for mounting a base of a fixed cup fixed to the lens to be processed is provided on the lens rotation shaft 704a side.
a is attached, and a lens retainer 740b is attached to the lens rotating shaft 704b side.

A driving plate 716 is provided at the left end of the carriage 700.
Is fixed, and a rotating shaft 717 is attached to the driving plate 716 so as to be rotatable in parallel with the shaft 701.
A pulse motor 721 is fixed to the driving plate 716 by a block 722. The rotation of the pulse motor 721 is controlled by a gear 720 attached to the right end of the rotating shaft 717,
Power is transmitted to the shaft 702 via a pulley 718, a timing belt 719, and a pulley 703a attached to the left end of the rotating shaft 717. Further, the rotation of the shaft 702 is transmitted to the lens rotation shafts 704a and 704b via timing belts 709a and 709b and the like, whereby the lens rotation shafts 704a and 704b rotate in synchronization.

A rack 713 is fixed to the intermediate plate 710, and the carriage 700 moves in the axial direction of the shaft 701 by the rotation of the pinion 715 which is attached to the rotating shaft of the carriage moving motor 714 and meshes with the pinion 715.

The carriage 700 is rotated by a pulse motor 728. The pulse motor 728 is fixed to a block 722, and a pinion 730 fixed to a rotation shaft 729 of the pulse motor 728 meshes with a round rack 725. The round rack 725 includes the rotating shaft 717 and the intermediate plate 71.
The block 722 slides with a certain degree of freedom between the correction block 724 and the block 722, which are positioned parallel to the shortest line connecting the shaft with the shaft 723 fixed to 0 and are rotatably fixed to the shaft 723. It is kept possible. A stopper 726 is fixed to the round rack 725 so that it can slide only below the position where the correction block 724 abuts. Accordingly, the rotation shaft 717 and the shaft 723 are driven in accordance with the rotation of the pulse motor 728.
Can be controlled, and the center distance r between the lens rotating shafts 704a and 704b having a linear correlation with r ′ and the rotating shaft 61a of the grindstone can be controlled.

The structure of the carriage is basically the same as that of the Japanese Patent Application Laid-Open No. 5-212661 by the present applicant.

(B) Lens Shape Measuring Unit FIG. 4 is a sectional view of the lens shape measuring unit 5, and FIG. 5 is a plan view thereof. The lens shape measuring unit 5 includes two feelers 52
Measuring arm 527 with 3, 524, measuring arm 527
Motor 503, pulley 513, belt 5
14, a rotation mechanism such as a pulley 507, a shaft 501, a pulley 508, etc., a sensor plate 510 for controlling the rotation of the DC motor 503 by detecting the rotation of the measurement arm 527, and detecting the rotation amount of the photo switches 504, 505 and the measurement arm 527. And a detection mechanism including a potentiometer 506 for obtaining the shapes of the front and rear surfaces of the lens. The configuration of the lens shape measuring section 5 is basically the same as that of Japanese Patent Application Laid-Open No. Hei 3-20603 filed by the same applicant as the present invention.

The shape of the lens (edge thickness) is measured by rotating the lens to be processed while bringing the feeler 523 into contact with the refracting surface of the front surface of the lens, and detecting the amount of rotation of the pulley 508 by the potentiometer 506 and refracting the front surface of the lens. After obtaining the shape of the surface, the feeler 524 is then brought into contact with the refracting surface on the rear surface of the lens to obtain the same shape.

(C) Display Unit and Input Unit FIG. 6 is an external view of the display unit 3 and the input unit 4. Display 3
Is constituted by a liquid crystal display, and displays a parameter setting screen, a layout screen for inputting layout information, a screen for simulating a bevel position and a bevel cross-sectional state with respect to a lens shape, and the like under the control of a main arithmetic control circuit described later.

The input unit 4 has a switch 402 for instructing the material of the lens to be processed, a switch 403 for instructing the material of the frame, and selecting a processing mode (automatic beveling, forced beveling, flat processing or mirror finishing). Mode switch 404, an R / L switch 405 for selecting the left and right of the lens to be processed, a switch 407 for switching a screen displayed on the display unit 3, and a cursor or arrow displayed on the display unit 3 is moved to select an input item. A movement switch 408, a switch 409 used for inputting numerical values of data, a start / stop switch 411 for starting and stopping processing, a switch 413 for opening / closing a lens chuck, a trace switch 416 for instructing a trace of a lens frame or a template, There is a next data switch 417 for transferring the traced data.

[0030] (d) device of the electric control system 7 is a drawing showing the essential components of the electric control system block diagram of the apparatus. The main operation control circuit 100 is constituted by, for example, a microprocessor, and its control is controlled by a sequence program stored in the main program memory 101. The main operation control circuit 100 can exchange data with an IC card, an optometry system device, and the like via the serial communication port 102. Further, it performs data exchange and communication with the spectacle frame shape measuring unit 2. The spectacle frame shape data is stored in the data memory 103.

A display unit 3, an input unit 4, an audio reproducing device 104, and a lens shape measuring unit 5 are connected to the main operation control circuit 100. The lens measurement data and the like calculated by the main calculation control circuit 100 are stored in the data memory 103. Carriage moving motor 714, pulse motor 72
Reference numerals 8 and 721 are connected to the main operation control circuit 100 via a pulse motor driver 110 and a pulse generator 111. The pulse generator 11 receives an instruction from the main operation control circuit 100, and controls the operation of each motor based on how many Hz and how many pulses are output to each pulse motor.

The operation of the apparatus having the above configuration will be described. First, the spectacle frame (or template) is set on the spectacle frame shape measuring unit 2, and the trace switch 416 is pressed for tracing. The spectacle frame data is transferred and input to the apparatus main body by pressing the next data switch 417, and is stored in the data memory 1.
03 is stored. At the same time, a lens shape (frame shape) based on the spectacle frame data is displayed on the screen of the display unit 3 so that the processing conditions can be input.

The operator inputs layout data such as the PD value, the FPD value, and the height of the optical center of the wearer through the input unit 4 while viewing the screen displayed on the display unit 3. The apparatus obtains radial information based on the spectacle frame data and the layout data, and stores the information in the data memory 103. Further, the processor inputs processing conditions such as the material of the lens to be processed, the material of the frame, the left and right of the lens to be processed, the processing mode, and the like.

After inputting the processing conditions, the processor opens the cover 12 with the left hand, holds the lens to be processed with the fixed cup attached to the right hand, and attaches the base of the fixed cup to the lens rotating shaft 704a side. Attach to the cup receiver 740a. Subsequently, the switch 1 provided on the cover 12
A command to move the lens rotation shaft 704b in the axial direction is input by the switch 3 or the switch 413 to chuck the lens to be processed. At this time, the lens to be processed is the cup receiver 7.
Even when it is necessary to hold the lens to be processed so as not to fall off from the lens 40a, while holding the lens to be processed with the right hand,
The switch 13 provided on the cover 12 can be operated with the left hand, and a smooth operation can be performed. If the switch 13 is provided in the vicinity of a portion where the processor can assist the operator when opening and closing the cover, the switch can be operated while the cover 12 is supported by the left hand, which is more convenient.

When the lens to be processed is chucked, the cover 12 is closed to start processing. When the cover 12 is completely closed, the sensor 14 detects this. The detection signal is input to the main operation control circuit 100. After confirming that predetermined processing start conditions, such as input of layout data and input of processing conditions, are satisfied, the main operation control circuit 100 automatically starts processing based on the input detection signal. For this reason, the processor needs the start / stop switch 4
Processing can be started without the labor of pressing 11. The start of processing can be instructed by the start / stop switch 411. However, when the cover 12 is not detected to be closed, the start signal of the switch 411 is not accepted, and the processing when the cover is forgotten to be closed is not performed. Starting can also be prevented.

The main operation control circuit 100 first performs an operation process for processing correction based on the input data to obtain processing correction information. Subsequently, the lens shape measuring unit 5 is operated to measure the lens shape. The processing correction and the measurement of the lens shape are described in JP-A-5-212661 and the like. When the lens shape data (edge position) is obtained, a bevel calculation for obtaining a bevel apex position is performed based on this information to obtain beveled data. To calculate the bevel apex position, a method of determining the lens edge thickness at a certain ratio, or shifting the bevel apex position to the rear side by a fixed amount from the edge position of the front surface of the lens so that the same bevel curve as the front curve is set up Various methods (Japanese Unexamined Patent Publication No.
212661, etc.).

When the automatic processing mode is designated, rough processing starts after completion of the bevel calculation. Main operation control circuit 10
0 moves the lens chucked to the coarse grindstone according to the specification of the material of the lens to be processed, and drives and controls each motor based on the processing correction information to process the lens to be processed. During the roughing, the bevel cross-sectional view based on the bevel data obtained by the bevel calculation is automatically and sequentially displayed over the entire circumference on the display unit 3, so that the bevel state can be confirmed during this time.

When the rough processing is completed, the process proceeds to the finishing processing. After detaching the lens to be processed from the coarse grindstone, the main arithmetic control circuit 100 positions the lens on the bevel groove of the finishing grindstone 60c, and performs beveling by controlling the driving of each motor based on the beveling information. .

If the cover 12 is accidentally opened during such processing, the sensor 14 detects this, and
The main operation control circuit 100 stops the machining operation based on the detection signal. Further, when it is detected that the cover 12 has been opened during the processing, the processor is notified of this by a buzzer sound or the like from the sound generation device 104.

When the processing is completed (the processing is automatically stopped), the processed lens is removed. At this time, the processor opens and closes the cover 12 with the left hand and holds the chucked lens with the right hand while opening and closing the lens rotation shaft 704b with the switch 13 near the left hand attached to the cover 12. The lens can be easily removed with the right hand.

In the above embodiment, only the switch 13 for inputting an instruction to open and close the lens rotating shaft 704b is provided on the front side of the cover 12, but another instruction switch may be further provided.

The operation of the apparatus (the lens rotating shaft 704b)
As shown in FIG. 8, the command input of the opening / closing operation may be input by pushing the cover 12 itself toward the support shaft 120 while the cover 12 is opened. Cover 12
Is held by a click mechanism in the open state, a spring 121 and a switch 122 are provided below the support shaft 120, and when the operator presses the cover 12, the switch is turned on, and a command signal for opening and closing the lens rotating shaft 704b is input. Is done. The cover 12 is returned to the original position by the spring 121. In addition, such a switch mechanism opens the cover 12 and then moves the cover 12 further to the rear side (right side in FIG. 8) toward the apparatus.
The switch can be turned on by pressing and rotating about the support shaft 120.

[0043]

As described above, according to the present invention,
The switch operation of the processor can be simplified, and the working efficiency can be improved.

[Brief description of the drawings]

FIG. 1A is a schematic external view of an apparatus according to an embodiment.

FIG. 1B is a perspective view showing the internal configuration of the apparatus of the embodiment.

FIG. 2 is a sectional view of a carriage.

FIG. 3 is an A view of FIG. 1B showing a drive mechanism of the carriage.

FIG. 4 is a cross-sectional view illustrating a configuration of a lens shape measurement unit.

FIG. 5 is a plan view illustrating a configuration of a lens shape measurement unit.

FIG. 6 is an external view of a display unit and an input unit.

FIG. 7 is a diagram showing a main part of an electric control system block diagram of the apparatus.

FIG. 8 is a diagram showing an example of changing a command input by a cover.

FIG. 9 is a diagram illustrating a configuration of a conventional device.

[Explanation of symbols]

 Reference Signs List 11 processing chamber 12 cover 13 switch 14 sensor 100 main operation control circuit 704a, 704b lens rotation axis

Claims (7)

[Claims] In a lens grinding apparatus for grinding a lens to be processed so as to conform to the shape of a spectacle frame, an opening / closing cover of a processing chamber for performing lens grinding processing, wherein a worker performs opening / closing operation with a hand. A lens grinding apparatus comprising: an opening / closing cover; and a command signal input unit provided on the opening / closing cover for inputting a signal for commanding an operation of the device. 2. A lens grinding apparatus according to claim 1, wherein the signal input by said command signal input means is a command signal for starting chucking of a lens rotating shaft for chucking a lens to be processed. Grinding equipment. 3. The lens grinding apparatus according to claim 1, wherein the command signal input means is an operation switch operated by a processor, and the operation switch is operated by a hand when the operator performs the opening / closing operation of the opening / closing cover. A lens grinding apparatus which is arranged near a position to be attached. 4. The lens grinding apparatus according to claim 1, further comprising: holding means for holding the open state of the open / close cover, wherein the command signal input means is connected to the open / close cover held by the hold means. A lens grinding apparatus, which is a detecting means for detecting that a predetermined operation has been performed. 5. A lens grinding apparatus for grinding a lens to be processed so as to conform to the shape of a spectacle frame, which is an opening / closing cover of a processing chamber for performing lens grinding, wherein a worker performs opening / closing operations with hands. Opening / closing cover, detecting means for detecting the opening / closing state of the opening / closing cover, and control means for inhibiting or stopping the execution of the processing operation of the apparatus when it is detected based on the detection result that the opening / closing cover is open. And a lens grinding apparatus. 6. The lens grinding apparatus according to claim 5, further comprising data input means for inputting data necessary for starting processing of the lens to be processed, wherein said control means is configured such that said detection means opens and closes said opening / closing cover. When it is detected that the apparatus is closed from the closed state, it is controlled that the execution of the processing operation of the apparatus is started after confirming that predetermined processing start conditions have been input by the data input means and that the conditions have been met. Lens grinding machine. 7. A lens grinding apparatus for grinding a lens to be processed so as to conform to the shape of a spectacle frame, a side opposite to a lens axis provided with a cup receiver among left and right lens axes for chucking the lens to be processed. The chucking start switch is provided at a position where both hands do not intersect when the chucking start switch is operated with the hand opposite to the hand supporting the lens to be processed with the hand supporting the lens to be processed. Lens grinding machine.