JPH11129149A - Lens shape measuring device for spectacle frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens shape measuring device for a spectacle frame to bring a probe into accurate contact and smoothly execute measurement of a lens shape by a method wherein the nipping force of the holding rod, on the side where the probe is brought into first contact, of holding rods to respec tively nip upper and lower rims is increased to a value higher than that of the other holding rod. SOLUTION: In a lens shape measuring device for a spectacle frame, the upper and lower rim parts aL, aR, bL, and bR of the lens frames LF and RF of a spectacle frame MF comprise holding claws 43 and 44 to nip the upper and lower rims and a probe to measure a lens shape by bringing it into contact with the V-grooves V of the lens frames LF and RF. A difference in a nipping force is provided between holding claws 43 and 44 on the side where the probe is inserted and the other holding claws 43 and 44.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spectacle frame lens shape measuring apparatus for measuring the shape of a lens frame such as a lens frame or a template of a spectacle frame.

[0002]

2. Description of the Related Art Conventional eyeglass frame shape measuring apparatuses are disclosed in, for example, Japanese Patent Application Laid-Open Nos. 3-135708 and 3-261814.
As disclosed in Japanese Patent Application Laid-Open Publication No. H11-209, a configuration is disclosed in which a rim of a lens frame of an eyeglass frame is held using a pressing spring. As shown in FIG. 15, the spectacle frame MF measured by this lens shape measuring device is a left lens frame (left rim).
LF, right lens frame (right rim) RF, lens frame LF, RF
And the temples TL, TR attached to the opposite parts of the lens frames LF, RF. Here, when the spectacle user wears the spectacle frame MF, the portions above the lens frames LF and RF are upper rim portions aR and aL, respectively, and the portions below the lens frames LF and RF are lower rim portions, respectively. Let bR and bL.

Such a lens shape measuring device for measuring the shape of the spectacle frame MF includes a rim holding means 5 for holding the upper rim aL of the left lens frame LF, and a lower rim b of the left lens frame LF.
L, rim holding means 7 for holding the upper rim aR of the right lens frame RF, and rim holding means 8 for holding the lower rim bR of the right lens frame RF. Moreover, each of the rim holding means (rim holding means) 5 to 8 has a pair of holding rods a and b arranged vertically.

In order to hold the spectacle frame MF at a predetermined position of the lens shape measuring device, each of the rim holding means 5-8
Upper and lower rims aL, aR, bL, bR between the holding rods a, b
And the upper and lower rims aL, aR, bL, and bR are pressed against the respective holding rods b by the spring force acting on the holding rods a, and the upper and lower rims aL, a are held between the holding rods a, b.
R, bL and bR are sandwiched. In this state, for example, the feeler (measurement element) F is brought into contact with the bevel groove V of the lens frame LF, and the feeler is moved along the bevel groove V. The shape at V can be measured. Since this structure is well known, a detailed description is omitted.

[0005]

However, in such a conventional lens shape measuring device, the holding force of the holding rods a and b for pressing and holding the lens frames LF and RF as rims from the thickness direction is increased by the upper rim portion. aL and aR are equal to the lower rim portions bL and bR.

For this reason, the lens frame L of the spectacle frame MF
When F is curved and deformed, that is, when the lower rim portion bL is curved upward, for example, or when the left and right lens frames are twisted about the bridge portion, the upper rim portion aL and the lower rim portion One of the holding rods a and b cannot be sandwiched between the holding rod b and the lower rim portion bL in a good and reliable manner, as shown in FIG. Had occurred.

In this case, since the holding state of the lens frame LF is not stable, the feeler (measurement element) F having a fine tip does not properly engage with the bevel groove V of the lens frame LF, and the bevel groove V
And it could not be measured.

In order to solve the above-mentioned problems, the present invention solves the above-mentioned problem by, of the holding rods for holding each of the upper and lower rim portions, by applying the holding force of the holding rod on the side where the probe comes into contact first with the other holding rod. It is an object of the present invention to provide an eyeglass frame shape measuring apparatus which can accurately contact the tracing stylus and can smoothly perform the trajectory measurement by the tracing stylus.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a first aspect of the present invention is to contact a holding rod for holding the upper and lower rims of a lens frame of an eyeglass frame with a bevel groove of the lens frame. In a device for measuring the shape of a spectacle frame having a tracing stylus for measuring a trajectory, a holding force between a holding bar for holding a rim portion on the side where the measuring stylus is inserted and the other holding bar is provided. The eyeglass frame shape measuring device of the present invention is characterized in that the eyeglass frame shape measuring device is provided with a difference.

[0010] The invention according to claim 2 further comprises a holding bar for holding the upper and lower rims of the lens frame of the spectacle frame, and a tracing stylus for measuring the shape of the lens by making contact with the bevel groove of the lens frame. In the eyeglass frame shape measuring apparatus having a spectacle frame, of the upper and lower rim portions, the holding force of the holding bar for holding the rim portion on which the measuring element is brought into contact is variable with respect to the other holding bar. It is a lens shape measuring device.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the eyeglass frame shape measuring apparatus according to the present invention will be described below with reference to the drawings.

(1). First Embodiment <Structure> In FIG.
Is a ball-slider (lens edge processing device) for grinding a lens to be processed into a shape of a spectacle lens based on spectacle frame shape data from the frame shape measuring device 1.

As shown in FIG. 3, the frame shape measuring device 1 has a measuring device main body 10 having an opening 10b at the center of an upper surface 10a, and a switch section 11 provided on the upper surface 10a of the measuring device main body 10. This switch section 11 includes:
Mode switch 1 for switching between left and right measurement modes
2, a start switch 13 for starting measurement and a transfer switch 14 for transferring data.

The frame shape measuring apparatus 1 has an eyeglass frame (eyeglass frame) holding mechanism (eyeglass frame) for holding the left and right lens frames LF, RF of the eyeglass frame (eyeglass frame) MF of the eyeglasses M as shown in FIG. Means) 15, 15 'and its operation mechanism 16 are provided.

In FIG. 1, reference numerals 17 and 18 denote support frames fixed vertically to the chassis S in the measuring apparatus main body 10 and provided in parallel with each other as shown in FIG. A locking pin protruding from the surface opposite to the support frame 17), 20 is an arc-shaped slit provided at the upper end of the support frame 18, and 21 and 22 are mounting holes provided in the support frames 17 and 18. It is. The mounting holes 21 and 22 are formed in the arc-shaped slit 20.
The arc-shaped slit 20 is provided between the mounting holes 21 and 22.

As shown in FIG. 6, the operation mechanism 16 has a pair of operation shafts 23, 23 disposed in parallel between the support frames 17, 18 with an interval left and right. Both ends of the operation shafts 23 are rotatably held by support frames 17, 18.

The operating mechanism 16 has one operating shaft 23.
Axis driving mechanism (operation axis driving means) 90 for driving and operating the motor
7, an operation shaft interlocking mechanism (operation shaft interlocking means) 91 for interlocking the pair of operation shafts 23, 23 shown in FIGS. 7 and 8, and a movable frame movement restraining means (movable frame movement lock means) 92.

(Operation shaft drive mechanism 90) The operation shaft drive mechanism 90 includes a driven gear 24 fixed to one end (an end on the support frame 18 side) of one operation shaft 23, the support frame 18 and a measuring device. A rotating shaft 25 penetrating the front face 10c of the main body 10,
Fixed to one end of the rotating shaft 25 (or provided integrally)
And a driving gear 26 meshing with the driven gear 24 and the rotating shaft 2.
5 has an operation lever 27 attached to the other end.

In the figure, reference numeral 23a denotes a flat portion provided on the operation shaft 23. The flat portion 23a is provided up to near both ends of the operation shaft 23. The measuring device main body 10 is formed with a concave portion 28 extending over the upper surface 10a and the front surface 10c.
An arc-shaped protrusion 29 is formed on the upper surface of the device, and "open" and "closed" are provided on the upper surface 10a so as to be located on the left and right of the protrusion 29. The above-described operation lever 27 is disposed in front of the concave portion 28, and a bent portion provided at the upper end of the operation lever 27, that is, an instruction portion 27 a moves on the protrusion 29. The rotation of the lever 27 may be performed by using a driving device such as a motor.

Between the driven gear 24 and the locking pin 19, a two-position holding mechanism for holding the frame (corresponding to the above-mentioned "close") and releasing the frame holding (corresponding to the above-mentioned "open"). (2
Position holding means) 30 is provided.

The two-position holding mechanism 30 includes the above-described arcuate slit 20, a movable pin 31 projecting from the side surface of the driven gear 24 and penetrating through the arcuate slit 20, a movable pin 31 and a locking pin 19, And a spring (tensile coil spring) 32 interposed therebetween. Since the arc-shaped slit 20 is concentric with the mounting holes 21 and 22 as described above, it is also concentric with the driven gear 24 and the operation shaft 23. For this reason, the movable pin 31 is held at one of the two ends 20 a and 20 b of the arc-shaped slit 20 by the tensile force of the spring 32.

(Operation shaft interlocking mechanism 91) The above-mentioned pair of operation shafts 23, 23 are interlocked with each other via the operation shaft interlocking mechanism 91 as shown in FIGS. The operation shaft interlocking mechanism 91 includes disks 93, 93 'fixed to ends of the operation shafts 23, 23, pins 94, 94' protruding from one surface of the disks 93, 93 ', and a disk. Pins 95, 95 'projecting from the other surfaces of the 93, 93', and pins 94, 9 at both ends.
A link 96 is rotatably held at 4 ', and a link 97 is rotatably held at both ends by pins 95 and 95'. The links 96 and 97 are not limited to this, and may be an interlocking mechanism such as a wire.

(Movable Frame Restraining Mechanism 92) The movable frame restraining mechanism 92 as a stopping means is a pair of cylindrical shafts which are held by the operation shaft 23 in the longitudinal direction and slightly rotatable in the circumferential direction. (Slide lock member) 33, 33. The cylindrical shafts 33, 33 are rotatably held by vertical plate portions 39, 39 of movable frames 37, 37 which will be described later, and are not movable in the axial direction. Further, the flat portion 33b of the cut circular insertion hole 33a in the cylindrical shaft 33 and the flat portion 23a of the operation shaft 23 are formed.
A slight gap S is formed between the two as shown in FIGS. 1 (b) and 1 (c). The flat portion 23 of the cylindrical shaft 33 and the operating shaft 23
a constitutes a movable frame restraining mechanism (lock means) 92.

The operating shaft driving mechanism (operating shaft driving means) 9
The configuration of the parts other than 0 is the same as the eyeglass frame (eyeglass frame) holding mechanisms (holding means) 15 and 15 ′. In FIG. 12, L1 and L2 are rim holding means (rim holding means) for holding the upper rim aL of the left lens frame LF, respectively, and R1 and R2 are each holding the upper rim aL of the right lens frame RF. Rim holding means (rim holding means). The rim holding means L1 and L2 are incorporated in a left eyeglass frame (eyeglass frame) holding mechanism (holding means) 15 ',
The rim holding means R1 and R2 are incorporated in a right eyeglass frame (eyeglass frame) holding mechanism (holding means) 15. Moreover, each of the rim holding means L1, L2, R1, R2 is composed of holding claws 43, 44 described later.

When the corner of the flat portion 33b is not in contact with the corner of the flat portion 23a as shown in FIG. 1B, the cylindrical shaft 33 can move in the longitudinal direction of the operating shaft 23. When the corner of the flat portion 33b is in contact with the corner of the flat portion 23a as shown in FIG. 1C, the cylinder shaft 33 is in a locked state where it cannot move in the longitudinal direction of the operation shaft 23.

A string-like body 34 having an elastic portion which can be expanded and contracted by its own elastic force is provided on the cylindrical shafts 33, 33 (only one is shown in FIG. 1 (a) and the other is partially shown). Are attached. This string-like body 34 is
A spring (elastic portion) 35 having one end fixed to the spring 35 and a wire 36 connected to the other end of the spring 35 are provided.

In FIG. 1, the lower rim bL (bR) of the lens frame (rim) LF (RF) shown in FIG.
Of the lens frame LF (RF) are held by holding claws (holding pins, holding rods) 43 and 44 on the left side of the lens frame LF (RF).
Are the holding claws (holding pins, holding rods) 43, 4 on the right side of FIG.
4, the holding force (holding force) of the left holding claws (holding pin, holding rod) 43, 44 is determined by the left spring 35, and the right holding claw (holding pin, holding rod). ) The holding force (clamping force) of 43 and 44 is determined by the right spring 35. Further, normally, the holding force due to the spring force of the left and right springs 35, 35 is 2 respectively.
It is set to 50 g.

However, at the start of the measurement, the left and right lens frames LF
In (RF), the lower rim of the lens frame (rim) on the side where the feeler 50 comes into contact may be curved and deformed as shown by bL in FIG. In this case, the lower rim portion b
Spring 35 for holding claws (holding pins, holding rods) 43, 44 of rim holding means L2 for holding the central portion of L
In FIG. 1, the holding force by the spring force of the left spring 35 is set to, for example, 500 g. This setting
You may make it easy to change by switch operation.

As a result, even in the case of a spectacle frame which has been bent and deformed by some kind of momentum, the center of the lower rim bL floats from the holding rod b as shown in FIG. There is no gap c between the lower rim bL and the lower rim b, as shown in FIG.
By holding the holding claw 43 at the center of L, accurate measurement of the lens shape of the lens frame of the eyeglass frame or the like can be performed. This is because the holding claws 43 and 44 can move up and down as described later, and the spring force of the spring 35 acts relatively between the holding claws 43 and 44.
It should be noted that a spring having a holding force of 300 g, 350 g, 400 g, 450 g, or the like may be mounted so that the holding force can be changed according to the degree of deformation of the spectacle frame MF.

As a configuration for changing the above-mentioned holding force (pinching force), for example, a wire winding drum WD driven by a stepping motor SM is mounted on the claw mounting plate 42 as wire winding means, and this wire winding is performed. An adjustment switch Sa for winding the wire 36 around the winding drum WD and increasing the winding amount by the wire winding drum WD in one, two, three, four, and five steps is provided on the operation panel 11. When the adjustment switch Sa is operated, the holding force (holding force) of the temporary holding of the lens frame (rim) of the spectacle frame is sequentially increased in a stepwise manner. Clamping force <three-stage clamping force <four-stage clamping force <five-stage clamping force) so that the clamping force at the time of full holding of the lens frame is gradually increased from 300 g to 500 g. It may be that the manner it is possible to change to.

In this case, each rim holding means L1, L2, R
Each of the stepping motors 1 and R2 has the above-described stepping motor SM and spring 35, and each stepping motor SM is operated by an operation control circuit (operation control means) 200 shown in FIG. The signal from the super control switch Sa is input to the arithmetic and control circuit 200. Further, a switch S1 for selecting the holding force of the upper rim portion (for selecting the holding force) and a switch S2 for selecting the holding force of the lower rim portion (for selecting the holding force) are set on the operation panel 11.
The signals from the switches S1 and S2 are also input to the arithmetic and control circuit 200.

Signals from the mode changeover switch 12, the start switch 13, the transfer switch 14, and the like are also input to the arithmetic and control circuit 200. The operation control circuit 200
Operates the mode changeover switch 12 to operate the left diode L
D, lighting control of the right diode RD is performed to select whether the lens frame to be measured is the left lens frame LF or the right lens frame RF. Reference numeral 11a denotes a liquid crystal display unit provided on the operation panel 11, which is display-controlled by the arithmetic and control circuit 200.

Then, the arithmetic and control circuit 200 presses one of the switches S1 and S2 so that the mode changeover switch 1
Lens frame (rim) LF or RF currently selected in 2
The holding force of the holding claws 43, 44 of the rim holding means L1, R1 for holding the upper rim portion (aL or aR in FIG. 12) is changed or the currently selected lens frame (rim) LF or RF The user selects whether to change the holding force of the holding claws 43 and 44 of the rim holding means L2 and R2 for holding the rim portion (bL or bR in FIG. 12). The operation control circuit 200
By pressing the adjustment switch Sa, the switches S1 and S
2 to control the operation of the stepping motor SM corresponding to the rim holding means L1, L2, R1, R2 selected, and display the holding force of the selected holding claws 43, 44 on the liquid crystal display section 11a of the operation panel 11. Let it.

(Base Member of Eyeglass Frame Holding Mechanisms 15 and 15 ′) The eyeglass frame holding mechanisms 15 and 15 ′ are a pair of parallel guide shafts 80 spanned between the supporting frames 17 and 18 at intervals. , 81 and the supporting frames 17, 1 as shown in FIGS.
8 has a pair of movable frames 37, 37 (sliders) disposed between them. The movable frame 37 is formed in a T-shape from a horizontal plate portion 38 and a vertical plate portion 39 continuously connected to one end of the horizontal plate portion 38 vertically.

The eyeglass frame holding mechanisms 15, 15 'have guide rollers 82 rotatably held at both ends of the horizontal plate 38 of each movable frame 37 as shown in FIG. The guide roller 82 is composed of a pair of rollers r1 and r2 provided coaxially and rotatably as shown in FIG.

The guide rollers 82 at both ends of the movable frame 37 as a base member are rotatably held by guide shafts 80 and 81, respectively. Thereby, the movable frame 3
Reference numerals 7 and 37 are held in the measuring device main body 10 so as to be movable in the horizontal direction and relatively close to and away from each other.
One guide roller 82 is held at one end of the movable frame 37, and two guide rollers 82 are provided at the other end of the movable frame 37.

Each of the movable frames 37 is provided with the spectacle frame holding mechanisms 15 and 15 ′ at intervals in a direction perpendicular to the operation shaft 23. These eyeglass frame holding mechanisms 15, 15 '
Have the same structure, and as shown in FIG.
Only 5 will be described.

(Eyeglass Frame Holding Mechanism 15) The eyeglass frame holding mechanism 15 includes a tension coil spring 40 interposed between the horizontal plates 38, 38 of the movable frames 37, 37, as shown in FIG. A support plate 41 fixed to the center of the tip edge of the horizontal plate portion 38; and a claw mounting plate 4 disposed between a portion of the support plate 41 projecting above the horizontal plate portion 38 and the vertical plate portion 39.
2

The claw mounting plate 42 is held by the support plate 41 and the vertical portion 39 so as to be rotatable around a shaft-shaped support protrusion 42c of one side portion 42a. The illustration of the shaft-shaped support projection on the rear side of the nail mounting plate 42 is omitted.

At the tip of the other side 42b of the nail mounting plate 42, a shaft-shaped tapered holding nail 43 is projected as a first holding rod, and a rear end of the other side of the nail mounting plate 42 is provided. The rear end of a shaft-like holding claw 44 as a second holding rod is rotatably held by a support shaft 45. The holding claw 44 has a base portion 44a formed in a rectangular plate shape as shown in FIG. 1D and a tip portion formed in a tapered shape, and rotates around a support shaft 45, Holding claws 43
Relative to and away from. In addition, the tip of the holding claw 44 and the claw mounting plate 42 are urged by a torsion spring (not shown) wound around the support shaft 45 so as to always open.

Further, an L-shaped engaging claw 46 (a part of the holding rod retracting means) which cooperates with the operating mechanism 16 is provided on the vertical plate portion 39 so as to be located above the holding claw 44. ing. An edge-shaped claw portion 46 a extending below the tip of the engaging claw 46 is engaged with the holding claw 44. As a result, the other side portion 42b of the claw holding plate 42 becomes one side portion 42a.
Are rotated upward about the holding tabs 43, 44
Is narrowed against the spring force of a torsion spring (not shown).

As shown in FIG. 1D, the edge-shaped claw portion 46a of the engaging claw 46 is engaged with a substantially central portion of the holding claw 44. An idle pulley 47 rotatably held by the vertical plate portion 39 is disposed between the engagement claw 46 and the cylindrical shaft 33. The above-described wire 36 is supported by the idle pulley 47, and the end of the wire 39 is positioned substantially at the center between the side portions 42a and 42b, and the nail mounting plate 4
It is fixed to 2.

Each of the movable frames 37, 37 is covered with a frame guide member 48 shown in FIG. The frame guide member 48 has a vertical plate portion 48a fixed to the tip of the horizontal plate portion 38, a horizontal plate portion 48b fixed to the upper end of the vertical plate portion 39, and a corner where the plate portions 48a and 48b are continuously provided. It has an inclined guide plate portion 48c which is provided continuously and is inclined toward the horizontal plate portion 48b. An opening 48d is formed in the vertical plate portion 48a in correspondence with the holding claws 43, 44, and the holding claw 44 is projected from the opening 48d. The tip of the holding claw 43 is
4 and 43, when they are maximally open as shown in FIGS. 4 (a) and 4 (b), they are located in the opening 48d.

The vertical plates 48a, 48a of the frame guide members 48, 48 provided on each of the movable frames 37, 37
Surfaces provided in parallel with each other and facing each other are provided as holding surfaces. The holding surfaces of the pair of vertical plate portions 48a, 48a are moved toward and away from each other as the movable frames 37, 37 move toward and away from each other.

(Shape Measuring Means) The frame shape measuring apparatus 1 has shape measuring means for measuring the shape of the rim of the spectacle frame MF, that is, the lens frame LF (RF) of the spectacle frame MF.
This shape measuring means connects the feeler 50 to the lens frame LF.
By moving the feeler 50 along the bevel groove 51 of (RF), the moving position of the feeler 50 is defined as the moving radius ρi with respect to the angle θi, that is, the lens shape information (θi, ρ
i). Since a well-known structure can be adopted for this structure, a detailed description thereof will be omitted.

(Balling Machine) Further, as shown in FIG. 2, the grinding machine 2 has a processing section 60 for grinding the periphery of the lens to be processed.
(Not shown in detail). The processing section 60 holds a lens to be processed between a pair of lens rotation axes of the carriage, and determines the rotation of the lens rotation axis and the vertical rotation of the carriage based on the above-described lens shape information (θi, ρi). Control
The peripheral edge of the lens to be processed is ground by a rotating grinding wheel. Since this structure is well known, a detailed description thereof will be omitted.

<Operation> Next, the operation of the eyeglass frame shape measuring apparatus having such a configuration will be described.

I. Setting of the eyeglass frame In such a configuration, when the operation lever 27 is in the "open" position, the amount of the spring 35 wound around the cylindrical shaft 33 is the smallest, and the spring 35 Since it is not pulled, the tip of the holding claw 44 and the claw mounting plate 42 are opened by a torsion spring (not shown). In this position, the flat portion 33b of the cylindrical shaft 33 provided on the one operation shaft 23 and the flat portion
a is formed between the cylinder shaft 33 and the operation shaft 23.
Are relatively rotatable, and the cylinder shaft 33 is movable in the axial direction of the operation shaft 23.

Further, the one operating shaft 23 and the other operating shaft 23 are linked to each other via the operating shaft interlocking mechanism 91 to be in the same state.
A gap S is formed between the cylinder shaft 33 and the flat portion 33b of the cylinder shaft 33, so that the other operation shaft 23 and the cylinder shaft 33 can be relatively rotated, and the other operation shaft-shaped cylinder shaft 33 is Operation axis 2
3 is movable in the axial direction.

In this state, the spectacle frame (glasses frame) MF of the spectacles (glasses) is placed on the inclined guide plate portion 4 as shown in FIG.
8c, 48c, and when the spectacle frame MF is pressed down from above against the spring force of the coil spring 40, the gap between the frame guide members 48, 48, that is, by the guiding action of the inclined guide plates 48c, 48c. The distance between the movable frames (sliders) 37, 37 is increased, and the rim of the spectacle frame MF, that is, the lens frame LF (RF) of the spectacle frame MF is held by the claw 4.
The eyeglasses frame MF is set to a predetermined value by being moved to the position above the holding claws 43 and 43. When the movable frame 37 moves along with this setting, the cylinder shafts 33, 33 of the movable frame 37 move on the operation shafts 23, 23.

Ii. Holding of spectacle frame and restraining (locking) of movable frame 37 (Operation of spectacle frame holding mechanism 15) In such a state,
When the operating lever 27 is turned from the "open" position to the "closed" position, this turning is transmitted to the operating shaft 23 via the rotating shaft 25 and the gears 26 and 24, and the operating shaft 23 is moved to the position shown in FIG. And the corners of the flat portion 23a become flat portions 33b of the cylindrical shaft 33.
And the cylinder shaft 33 is rotated integrally with the operation shaft 23. With this rotation, the spring 35
Is wound around the cylindrical shaft 33.

Thus, the nail mounting plate 4 of the spectacle frame holding mechanism 15 is connected via the wire 36 connected to the spring 35.
2 is pivoted upward about one side 42a. Here, since the holding claw 44 is brought into contact with the edge-shaped claw portion 46a of the engagement claw 46 by a not-shown torsion spring,
The claw mounting plate 42 is rotated upward against the spring force of the torsion spring. With this rotation, the holding claws 43,
4C, the rim of the spectacle frame MF, that is, the lens frame RF of the spectacle frame MF is held between the holding claws 43 and 44 of the spectacle frame holding mechanism 15 as shown in FIG. 4C. Is done. In this position, the movable pin 31 is
The lower end 20a is held by the spring force of the spring 32.

In this position, the corner of the flat portion 23a of the one operating shaft 23 is pressed against the corner of the flat portion 33b of the cylindrical shaft 33 on the one operating shaft 23. The torsion spring force is maintained, and the cylinder shaft 33 as the lock member is frictionally fixed (locked) to the operation shaft 23.

(Operation of Eyeglass Frame Holding Mechanism 15 ')
As described above, when the operation lever 27 is rotated from the “open” position to the “closed” position to rotate one operation shaft 23, the rotation of the one operation shaft 23 is changed to the operation shaft interlocking mechanism 91. Is transmitted to the other operation shaft 23 via the disc 93, the links 96 and 97, and the disc 93 '.

Then, the other operation shaft 23 rotates as shown in FIG. 1C similarly to the one operation shaft 23, and the corner of the flat portion 23 a of the other operation shaft 23 is Part 33b
Of the cylinder shaft 33 on the other operation shaft 23.
Is rotated integrally with the other operation shaft 23. With this rotation, the spring 35 corresponding to the other operation shaft 23
Is wound around the cylindrical shaft 33 on the other operation shaft 23.

As a result, the nail mounting plate 42 of the spectacle frame holding mechanism 15 'is rotated upward about the one side 42a via the wire 36 connected to the spring 35. Here, the holding claw 44 is an edge-shaped claw portion 46 a of the engagement claw 46.
The nail mounting plate 42 is turned upward against the spring force of the torsion spring. With this rotation, the holding claws 4
The distance between the frames 3 and 44 is reduced as shown in FIG.
The rim of F, that is, the lens frame RF of the spectacle frame MF is held between the holding claws 43 and 44 of the spectacle frame holding mechanism 15 'as shown in FIG.

Also at this position, the corner of the flat portion 23a of the other operation shaft 23 is pressed against the corner of the flat portion 33b of the cylindrical shaft 33 on the other operation shaft 23. The torsion spring force is maintained, and the cylinder shaft 33 as the lock member is frictionally fixed (locked) to the operation shaft 23.

When the rim of the spectacle frame MF, that is, the lens frame LF (RF) of the spectacle frame MF, is removed from between the holding claws 43 and 44, each member is operated by operating the operation lever 27 in the reverse direction. Operates in a manner opposite to that described above.

Iii. Measurement of the shape of the lens frame As shown in ii.
′, The left and right portions of the movable frames 37, 37 are operated by the cylinder shafts 33, 33 as lock members.
Since the movable frames 37, 37 are locked to the movable frames 37, 37 so that the movable frames 37, 37 cannot be relatively approached / separated from each other.
Even if horizontal moment acts on the left and right part of 7,
The movable frames 37, 37 do not rotate in the horizontal direction.

Therefore, when the feeler 50 is moved along the bevel groove 51 of the lens frame LF (RF) in this state, the moving position of the feeler 50 is set as a moving radius ρi with respect to the angle θi, It is obtained as lens shape information (θi, ρi) in the form. At this time, even if a horizontal moment acts on the left or right portion of the movable frames 37, 37 due to the contact force acting on the bevel groove of the lens frame LF (RF) from the feeler 50, the movable frames 37, 37 Since the lens does not rotate in the horizontal direction, accurate lens shape information (θi, ρi) is obtained.

(2). Second Embodiment The present invention is not limited to the above embodiment, and may be configured as shown in FIG. The embodiment shown in FIG. 9 is different from the embodiment shown in FIGS. 1 to 4 in that the engagement claw 46 is omitted and the mounting structure of the holding claw 44 is changed. In addition, in the present embodiment, other configurations are the same as those in FIG.

In FIG. 9, the holding claw 43 is held by the movable frame 37 in the same manner as in FIG. A through hole 39a is provided in the vertical plate portion 39 of the movable frame 37, and a vertically extending guide rail 70 is mounted on the back surface of the vertical plate portion 39, and a slider 71 can be vertically moved on the guide rail 70. The rack bar 72 inserted into the through hole 39a is held by the slider 71 so as to be movable left and right in FIG. 9, and the rack bar 72 meshes with a drive pinion 73 held by the slider 71. A holding claw 44 is fixed to an end of the rack bar 72 on the opening 48d side.

The slider 71 is vertically moved by a drive motor (not shown), and the drive pinion 73 is driven to rotate by a drive motor (not shown). The vertical movement of the slider 71 and the rotation of the drive pinion 73 by the drive motor are performed at the following timing.

That is, when the operation lever 27 shown in FIG. 2 is in the "open" position, as shown in FIG.
The base of the holding claw 44 is located in the through hole 39a, and the tip of the holding claw 44 is located at the retracted position between the vertical plates 38a, 39 and does not protrude between the vertical plates 48a, 48a.

In this state, the spectacle frame (glasses frame) MF of the spectacles (glasses) is placed on the inclined guide plate portion 4 as shown in FIG.
8c, 48c, and when the spectacle frame MF is pressed down from above against the spring force of the coil spring 40, the gap between the frame guide members 48, 48, that is, by the guiding action of the inclined guide plates 48c, 48c. The distance between the movable frames (sliders) 37, 37 is increased, and the rim of the spectacle frame MF, that is, the lens frame LF (RF) of the spectacle frame MF is held by the claw 4.
It is moved to the position above 3, 43 and locked by the holding claws 43, 43.

Next, when the operating lever 27 shown in FIG. 2 is turned from the "open" position to the "closed" position, a switch (not shown) is turned on by the operating lever 27 at the initial stage of the turning, and the drive motor is turned on. As a result, the drive pinion 73 is rotated to move the rack bar 72 and the holding claw 44 toward the opening 48d of the vertical plate portion 48a as shown by the arrow, and the tip of the holding claw 44 is shown in FIG. As described above, the base is projected from the opening 48d, and the base of the holding claw 44 comes off from the through hole 39a. Thereafter, the slider 71 is moved downward by a drive motor (not shown),
The holding claw 44 is lowered from the position indicated by the broken line to the position indicated by the solid line as shown in FIG.

On the other hand, when the operation lever 27 is turned to the "closed" position side as described above, this rotation is
5, a part of the spring 35 is transmitted to the cylinder shaft 33 via the gears 26 and 24 and the operation shaft 23 and is wound around the cylinder shaft 33. The mounting plate 42 is rotated upward about the one side portion 42a, and the holding claw 43 is raised from the position shown by the broken line to the position shown by the solid line as shown in FIG.
The rim of the spectacle frame MF, that is, the lens frame LF (RF) of the spectacle frame MF is held between the holding claws 43 and 44 by narrowing the interval of 44. In this position, the movable pin 31 is held at the lower end 20 a of the arc-shaped slit 20 by the spring force of the spring 32.

When the rim of the spectacle frame MF, that is, the lens frame LF (RF) of the spectacle frame MF, is to be removed from between the holding claws 43 and 44, the operation lever 27 is operated in the opposite direction to the above operation. A second switch (not shown), which is turned on by the turning operation of 27, is operated, and each member operates in the reverse of the above.

In the present embodiment, the holding claw 44 is moved left and right by the drive motor (appears in and out of the opening 48d) and the holding claw 4 is moved.
4 was moved up and down, but this operation may be performed by a solenoid, or by interlocking with the operation lever 27 using a wire or a gear drive mechanism,
An operation similar to that shown in FIG. 9 may be performed. Further, in the above-described embodiment, the movable frame 37 is biased in the direction of directly approaching each other by the coil spring 40 for convenience of explanation because it is not a main part of the present invention. However, actually, the movable frames 37, 37
When one of the movable frames 37 is moved forward and backward with respect to the center position, the other movable frame 37 is moved forward and backward with respect to the center position in conjunction with the one movable frame 37, and the movable frames 37 and 37 are relatively approached and separated. In such a manner, the movable frames 37, 37 are set to be linked by a mechanism using a wire, a pulley, or the like, or a mechanism using a gear, or the like.

(3). Third Embodiment In the above-described embodiment, an example was shown in which the spring 40 was directly stretched between the movable frames 37, 37 facing each other, but the present invention is not necessarily limited to this. That is, FIGS.
, The movable frame 3 on the support frame 17 and the support frame 18 side.
7, a wire 102 having one end fixed to the support frame 17 is wound around the pulley 100, 101, and the other end of the wire 102 is connected to the movable frame 37 on the support frame 17 side. And a spring 40 may be stretched between the movable frame 37 on the support frame 17 side and the support frame 18.

In this embodiment, the spring 40 and the wire 1
In the state where the spectacle frame is not set, the lower ends of the movable frames 37, 37 are brought into contact with each other substantially at the center in the moving direction by the action of 02, and when the spectacle frame is set between the movable frames 37, 37. Are relatively separated from each other. The movable frame 37, 3 at this time
The movement amount of 7 is equalized by the action of the spring 40 and the wire 102.

In the embodiment described above, the operation shafts 23, 2
Although an example is shown in which one of the members 3 is turned by the lever 27, the present invention is not necessarily limited to this. For example, a worm is provided on the output shaft of the drive motor, and a worm gear meshing with the worm and attached to the operation shaft 23 is attached to one of the operation shafts 23, 23 so that the operation shaft is rotated by the drive motor. May be. Also,
The turning operation of the operation shaft 23 may be performed by a solenoid and a link mechanism or a rotary solenoid.

[0073]

As described above, according to the first aspect of the present invention, the holding bar for holding the rim of the upper and lower rims on the side to be brought into contact with the probe is held between the holding bar on the other side. Since the force difference is provided, the stylus can be prevented from coming off the bevel groove of the lens frame, and the stylus can be brought into good contact with the bevel groove of the lens frame in a good and reliable manner. Measurement of the mold shape can be performed.

Further, according to the invention of claim 2, the holding force of the holding bar for holding the rim portion of the upper and lower rim portions on which the measuring element comes into contact is variable with respect to the holding rod on the other side. Therefore, the holding force of the holding rod for holding the lens frame (rim) on which the tracing stylus abuts can be selected in a preferable state according to the thickness of the lens frame (rim). In addition, in the same manner as described above, it is possible to prevent the measuring element from coming off the bevel groove of the lens frame and to make the measuring element contact the bevel groove of the lens frame satisfactorily and securely. Shape measurements can be made.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a main part of an eyeglass frame shape measuring apparatus according to the present invention, (b) and (c) are cross-sectional views for explaining the relationship between a cylinder axis and an operation axis in (a); (d) is an explanatory view of the holding claws.

FIG. 2 is an explanatory view showing the relationship between the eyeglass frame shape measuring device and the ball mill shown in FIG.

FIG. 3 is an enlarged perspective view of the frame shape measuring device shown in FIG.

4 (a) to 4 (c) are explanatory diagrams of the operation of holding the spectacle frame of the frame shape measuring apparatus shown in FIG.

FIG. 5 is an explanatory view showing a support structure of the movable frame shown in FIG. 1;

FIG. 6 is a sectional view taken along line AA of FIG.

FIG. 7 is an explanatory diagram illustrating a relationship between an operation shaft and a movable frame illustrated in FIG. 1;

FIG. 8 is a front view of the operation shaft interlocking mechanism shown in FIG. 7;

FIGS. 9A to 9C are explanatory diagrams illustrating another example of the frame shape measuring apparatus according to the present invention.

FIG. 10 is an explanatory view showing another example of the movable frame urging means shown in FIG. 4;

FIG. 11 is a schematic explanatory diagram of FIG. 10;

FIG. 12 is an explanatory diagram showing a relationship between a rim holding means and an eyeglass frame according to the present invention.

FIG. 13 is a sectional view showing a relationship between the lens frame and the rim holding means shown in FIG.

FIG. 14 is an explanatory diagram of a control circuit of the lens shape measuring device according to the present invention.

FIG. 15 is an explanatory diagram showing a relationship between a conventional rim holding means and an eyeglass frame.

16 is a cross-sectional view showing a relationship between the lens frame and the rim holding means shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Frame shape measuring device (ball shape measuring device) 35 ... Spring 43 ... Holding claw (first holding bar) 44 ... Holding claw (second holding bar) 92 ... Movable frame restraining mechanism (stopping means) 200: arithmetic control circuit (arithmetic control means) L1, L2, R1, R2: rim holding means (rim holding means) MF: eyeglass frame LF, RF: lens frame (rim) aL, aR: upper Rim bL, bR: Lower rim SM: Stepping motor

Claims (2)

[Claims] 1. An eyeglass frame having a holding bar for holding the upper and lower rims of a lens frame of the eyeglass frame and a measuring element for measuring the shape of the eyeball in contact with a bevel groove of the lens frame. In the shape measuring device, a difference is provided in a holding force between a holding bar for holding the rim portion on the side where the measuring element is inserted and the other holding bar, and a lens shape measuring device for an eyeglass frame. 2. A spectacle frame lens having a holding rod for holding the upper and lower rims of the lens frame of the spectacle frame, and a measuring element for measuring the lens shape by contacting the bevel groove of the lens frame. In the shape measuring device, the shape of the eyeglass frame, wherein the holding force of the holding bar that holds the rim portion of the upper and lower rim portions that abuts on the tracing stylus is variable with respect to the other holding bar. Shape measuring device.