JP2598089B2 - Eyeglass lens peripheral edge chamfering device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a spectacle lens peripheral edge chamfering apparatus used for chamfering both side corners of an eyeglass lens.

(Prior Art) As an apparatus of this type, for example, there is a lens peripheral processing machine as shown in FIGS. 8 and 9 (see Japanese Patent Application Laid-Open No. 56-15964).

In this lens peripheral processing machine, a lens 4 to be processed is held between lens axes 2 and 3 of a main body 1 to rotate the lens axes 2 and 3 at low speed, while a cutting blade 6 driven by a motor 5 By moving the cutting blade 6 to the peripheral surface of the lens 4 to be processed by moving it to the side 4, the shape of the lens 4 to be processed is roughly ground to the lens frame shape of the spectacle frame to be mounted.

In addition, the beveling grindstone 7 is moved on the rough-processed lens 4 and the bevel grindstone 7 is driven to rotate by the motor 8 so that the beveled grindstone 7 is placed on the peripheral edge of the lens 4 by its own weight. As shown in FIG. 9, a beveled portion 4a is formed at the periphery of the lens 4 to be processed. At the time of this processing, since the lens 4 to be processed is rotated by the lens axes 2 and 3,
The length of the lens 4 to be processed to the contact portion with the beveled grindstone 7,
That is, although the moving radius changes with the rotation, the beveling grindstone 7 swings up and down by the swingable arm 9 with the change in the moving radius.

The lens 4 to be processed thus beveled has corners a and b on both sides of the bevel 4a.

In order to chamfer the corners a and b, the above-mentioned lens peripheral processing machine uses the chamfering grindstone 10 in which the angle θ of the V-groove 10a is smaller than that of the beveling grindstone 7.

The chamfering grindstone 10 is attached to an output shaft of a motor 11, and a support plate 12 holding the motor 11 is mounted on a support shaft 13 so as to be rotatable and movable in the axial direction.

(Problems to be Solved by the Invention) In such a lens peripheral processing machine, an operator presses the support plate 12 by hand to press the chamfering grindstone 10 against the beveled portion 4a of the lens 4 to be processed. By doing so, the corners a, b
Chamfering. However, there is a problem that skill is required because the amount of chamfering is manually performed while visually checking by an operator.

In addition, since the chamfering of the corners a and b is performed separately, there is a problem that the chamfering operation takes time.

Accordingly, an object of the present invention is to provide a spectacle lens peripheral edge chamfering apparatus which does not require skill in chamfering both side corners of a lens peripheral edge to be processed and can shorten a chamfering operation time. It is.

(Means for Solving the Problems) In order to achieve this object, according to the first aspect of the present invention, there is provided a frame which is detachably mounted on a carriage of a ball mill, which is driven by driving means and is parallel to a lens axis of the carriage. A chamfer provided with a grindstone shaft disposed on the frame so that the grindstone shaft can move forward and backward in an axial direction and in a direction intersecting with the lens axis, and a tapered chamfering slope is provided on a peripheral edge of one side surface. A grindstone is fixed to the grindstone shaft, and the grindstone shaft is urged by urging means in a direction in which the chamfering slope advances, and a lens receiving collar disposed on the chamfering slope is used as the chamfering grindstone. The wheel shaft is rotatably fitted and held adjacent to the grinding wheel shaft.

According to the second aspect of the present invention, a pair of chamfering means including the grinding wheel shaft, the chamfering whetstone, the urging means, and the collar are provided in proximity to each other, and the collars of the pair of chamfering means are mutually lateral. And the directions of the chamfered slopes are provided on the sides corresponding to each other.

(Operation) According to the configuration of claim 1 described above, the collar and the chamfering grindstone are brought into contact with the corners of the peripheral edge by the weight of the chamfering grindstone or the like, respectively. When the grinding wheel is rotated, chamfering is performed at a fixed position on the corner of the lens to be processed by the urging force of the urging means.

According to the configuration of the second aspect, the chamfering of the corners on both side surfaces is performed simultaneously by the pair of chamfering whetstones.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS.

<First Embodiment> Figs. 1 to 5 (a) and (b) show a first embodiment of the present invention.

FIG. 1 shows a ball mill having the spectacle lens peripheral edge chamfering device according to the present invention.

In FIG. 1, reference numeral 14 denotes a ball-sliding machine, and reference numeral 15 denotes a chamfering device for the corners on both sides of the peripheral portion of the spectacle lens according to the invention.

The ball mill 14 includes a main body 16 and a bearing projection 16a at the rear of the main body 16,
A spindle 17 bridged between 16a, a carriage 18 attached to the spindle 17 so as to be vertically movable and movable in the axial direction,
It has a mold receiver 19 mounted on the main body 16 so as to be able to move up and down, and a lens grinding wheel 20 rotatably mounted on the main body 16. still,
The carriage 18 is controlled to move in the longitudinal direction of the support shaft 17 by a drive motor (not shown), the mold receiver 19 is controlled to move up and down by a pulse motor (not shown) in the main body 16, and the lens grinding wheel 20 is a motor in the main body 16. (Not shown) so as to be rotated at high speed. The lens grinding wheel 20 is a rough grinding wheel 21.
And a beveled whetstone 22.

Shaft mounting projections 18a, 18b are provided on both sides of the free end of the carriage 18.
Are provided, and lens shafts 23 and 24 parallel to the support shaft 17 are rotatably mounted on the shaft mounting protrusions 18a and 18b, respectively. The lens axes 23 and 24 are arranged in series on the same axis, and the lens axis 24 is provided so as to be able to advance and retreat with respect to the lens axis 23 by rotating the operation knob 25. Therefore, by this operation, the lens L to be processed is moved to the lens axis.
Hold the lens L between 23 and 24, or move the lens L to be processed
Can be removed from 24 spaces. Reference numeral 25 denotes a template detachably mounted on the lens shaft 23, reference numeral 26 denotes a support shaft mounted on the carriage 18 so as to be parallel to the lens shaft 23 and rotatable around the axis, and reference numeral 27 denotes a stopper lever fixed to the support shaft 26. is there. A notch engaging portion (not shown) is provided at the tip end of the stopper lever 27, and the engaging notch
The rotation operation of 27 causes engagement and disengagement with the end of the lens shaft 23.

Since the configuration and operation of such a ball mill is well known, a detailed description of the configuration will be omitted.

The chamfering device 15 according to the invention described above includes a carriage 18
A whetstone mounting frame 28, and a sliding arm for mounting the whetstone mounting frame 28 to the locking frame.

The locking frame has a pair of side plates 29, 29 formed in a substantially y-shape from the support pieces 29a, 29b, 29c, and the support pieces 29a, 29a of the pair of side plates 29, 29, 29b, 29b and 29c, It has connecting shafts 30, 31, and 32 that fix 29c to each other. Each side plate 29 has a shaft engagement notch 29d formed between the bases of the support pieces 29a and 29b.

The swing frame has arms 33, 33 attached to the connection shaft 32 so as to be movable up and down, and connection shafts 34, 35 connecting the middle portions and the tip portions of the arms 33, 33.

The grindstone mounting frame 28 has inverted V-shaped end walls 28a, 28a '.
And the side walls 28b, 2 connecting the side portions of the end walls 28a, 28a 'to each other.
From 8b ', the plane shape is formed substantially square. Moreover, guide slits 36, 36 'are formed in the side walls 28b, 28b'. Such an end wall 28a of the whetstone mounting frame 28,
The central portion of 28a 'is rotatably attached to the connecting shaft 35.

In the vicinity of one side of the end walls 28a, 28a ', FIG.
(B), bearings 37, 3 as shown in Figs. 5 (a), (b)
7 'is fixed with screws 38, 38', and bearings 39, 39 'are fixed with screws 40, 40' near the other side of the end walls 28a, 28a '.
Motors 41, 42 are provided as rotation driving means between the end walls 28a, 28a ', and output shafts 41a, 42a protruding from both ends are provided on the motors 41, 42 as grinding wheel shafts. This output shaft 4
1a is held by bearings 37 and 37 'so as to be rotatable and movable in the longitudinal direction, and the output shaft 42a is held in bearings 39 and 39' so as to be rotatable and movable in the longitudinal direction. The casings of the motors 41, 42 are provided with rotation regulating pins 41b, 42b projecting as shown in FIG. 2, and the rotation regulating pins 41b, 42b are inserted into the guide slits 36, 36 'of the side walls 26b, 26b', respectively. ing.

A metal cylinder 43 for attaching a grindstone is fitted around the outer periphery of the output shaft 41a, and a collar 44 provided between the metal cylinder 43 and the motor 41 is rotatably fitted. The metal cylinder 43 is fixed between a nut 45 screwed to the output shaft 41a and a step 46 of the output shaft 41a, and a disk-shaped chamfering grindstone 47 is fixed to the metal cylinder 44. . The chamfering grindstone 47 has a tapered chamfering slope 47a on the collar 44 side.
Moreover, a thrust washer 48 and a thrust cushion 49 disposed between the chamfering grindstone 47 and the end wall 26a are provided on the output shaft 41a.
The thrust cushion 49 urges the chamfering grindstone 47 in the direction in which the chamfering slope 47a moves forward. The motor 41, the chamfering grindstone 47, the thrust washer 48, the thrust cushion 49 and the like constitute a chamfering means.

Further, as shown in FIGS. 5 (a) and 5 (b), the motor 41 and the parts mounted on the output shaft 41 of the motor 41 are temporarily moved in the direction in which the chamfering slope 47a of the chamfering grindstone 47 is retracted. Is provided with driving means for driving displacement. This drive means
It is composed of a pair of solenoids S, S disposed between the end wall 28a and the back of the motor 41. The solenoids S, S are fixed to the end wall 28a at positions sandwiching the output shaft 41a.

In this embodiment, the solenoids S, S are motors of the end wall 28a.
It is fixed to the surface on the 41 side, but is not necessarily limited to this configuration. For example, the solenoids S, S are connected to the end wall 28a.
And the actuators A, A of the solenoids S, S penetrate the end wall 28a and protrude toward the motor 41, and the rear surface of the motor 41 is pressed by the actuators A, A. It may be possible to do it. In this case,
The pressing stroke of the motor 41 by the actuator A can be increased. Alternatively, a solenoid having a large stroke may be attached along the end wall 28a, and the rear surface of the motor 41 may be pressed via a lever, a link, or the like interlocking with the actuator of the solenoid. In this case, the motor 41 can be pressed with a large stroke by increasing the lever ratio.

Since the same component as the component mounted on the output shaft 41a is also arranged in the output shaft 42a in the opposite direction, the same component is given a reference numeral with a dash attached to the number of the component mounted on the output shaft 41a. The description is omitted. Also, a solenoid S 'is similarly interposed between the rear surface of the motor 42 and the end wall 28a'.

In addition, the collars 44, 44 'are located on the sides of each other, and the directions of the chamfering slopes 47a, 47a' are provided on the sides corresponding to each other.

Next, the operation of the spectacle lens peripheral edge chamfering device having such a configuration will be described.

The above-mentioned lens L to be processed is roughly ground into a lens frame shape by a rough grinding wheel 21, and the lens L to be roughly ground is processed.
Is beveled by a beveling grindstone 226 on the peripheral edge of. At this time, the chamfering device 15 is detached from the lens shafts 23 and 24.

When the beveled portion 50 is applied to the lens L to be processed by the rubbing machine 14 in this manner, corner portions 50a, 50
b is formed as shown in FIGS. 5 (a) and 5 (b).

When chamfering the corners 50a and 50b, first, the mold receiver 19 is raised by a motor (not shown) to
The lens L to be processed is separated from the lens grinding wheel 20 as shown in FIG. The first
In the drawing, for convenience of explanation, only the carriage 18 is raised and the mold receiver 19 is not raised, but the mold receiver 19 is actually brought into contact with the illustrated template 25.

Next, the side plates 29, 2 constituting the locking frame of the chamfering device 15
9 are engaged with the lens shafts 23, 24 obliquely from above, and the support pieces 29a, 29a of the side plates 29, 29 are locked to the upper edge of the carriage 18, and the side plates 29, 29 Support pieces 29b, 29b
To the lower edge of the carriage 18. Then, by operating the solenoids S, S 'to advance the actuators A, A' of the solenoids S, S ', the back surfaces of the motors 41, 42 are pressed, and the gap between the chamfering wheels 47, 47' is reduced. Spread a little, the fifth
The thrust cushions 49, 49 'are compressed as shown in FIG. Next, the collars 44, 44 'of the output shafts 41a, 42a are
The lens L to be processed is brought into contact with the upper end of the peripheral edge of the bevel portion 50 by its own weight, such as 1,42, the collars 44,44 ', and the chamfering wheels 47,47'. In this state, the chamfering wheels 47, 47 'are separated from the lens L to be processed as shown in FIG.

In such a state, the motors 41 and 42 are operated to
By rotating and driving 1a and 42a, chamfering whetstones 47 and 47 '
When the lens L and the lens shafts 23 and 24 are rotated at a low speed to rotate the lens L to be processed, the chamfering whetstones 47 and 47 'are vertically swung by the swing frame 28 without being pressed against the lens L to be processed. . In this state, when the power supply to the solenoids S, S 'is stopped, the actuators A, A' of the solenoids S, S 'are stopped.
Is reduced as shown in Fig. 5 (a), and the chamfering whetstones 47, 4
7 'is the corners 50a, 50b of the lens L to be processed as shown in FIG.
The corners 50a, 50b are chamfered by being pressed against the thrust cushions 49, 49 'by the elastic force of the thrust cushions 49, 49', so that the chamfering start portions of the corners 50a, 50b are not deeply scratched.

In this embodiment, the lens L to be processed is formed by the collars 44, 44 '.
, And the chamfering grindstones 47 and 47 'were temporarily separated from the lens L to be processed by using the solenoids S and S' until the chamfering grindstones 47 and 47 'were rotationally driven. It is not necessarily limited to this configuration. For example, it is also possible to use a link or a release wire so as to be manually operated to temporarily separate the lens from the lens L to be processed.

<Second Embodiment> FIGS. 6 and 7 show a second embodiment of the present invention.

This embodiment shows another example of the structure of the grinding wheel mounting frame and the mounting structure of the chamfering whetstone.

The whetstone mounting frame 28 'of this embodiment has an inverted V-shaped side plate.
51, 51 ', a cylindrical connecting shaft 52 rotatably fitted to the outer periphery of the connecting shaft 35 and connecting and fixing the central portion of the side plates 51, 51', and a side of the side plates 51, 51 '. It has connecting shafts 53 and 54 for connecting and fixing the parts. A first slider 55 is attached to the connecting shafts 52 and 53, and a second slider 56 is attached to the connecting shafts 52 and 54.
Is attached.

A motor 57 is attached to the first slider 55,
A collar 58 is rotatably attached to an output shaft 57a (grinding wheel shaft) of 57, and a chamfering grindstone 59 is fixed. On the collar 58 side of the chamfering grindstone 59, a tapered chamfering inclined surface 59a is formed. These constitute a chamfering means.

Similarly, a motor 57 'is attached to the second slider 56, and a collar 5 is attached to an output shaft 57a' (grinding wheel shaft) of the motor 57 '.
8 'and chamfering grindstone 59' are attached. The chamfered slopes 59a, 59a 'of such chamfering whetstones 59, 59' correspond to each other. These constitute a chamfering means.

A spring 60 wound around the connecting shaft 52 is interposed between the first and second sliders 55 and 56 as a biasing means.

In this embodiment, the sliders 55 and 56 are also configured so that the spring 60 can be temporarily compressed by a solenoid (not shown). In this case, one solenoid may be interposed between the sliders 55 and 56, or a solenoid may be provided for each of the sliders 55 and 56. Also in this embodiment, the solenoid is used to temporarily separate the chamfering grindstone from the lens to be machined until the lens L is brought into contact with the collars 44 and 44 'and the chamfering wheels 47 and 47' are rotationally driven. However, the present invention is not necessarily limited to this configuration. For example, it is also possible to use a link or a release wire so as to be manually operated to temporarily separate the lens from the lens to be processed.

(Effects of the Invention) As described above, the invention according to claim 1 is provided with a frame that is removably attached to a carriage of a balling machine, and is driven by driving means and disposed in parallel with a lens axis of the carriage. The frame is held in the frame so that it can move forward and backward in the axial direction and in the direction intersecting the lens axis, and the chamfering grindstone provided with a tapered chamfering slope on one side peripheral edge is provided. The grinding wheel shaft is fixed, and the grinding wheel shaft is urged by biasing means in a direction in which the chamfering slope advances, so that a lens receiving collar disposed on the chamfering slope side is adjacent to the chamfering grindstone. As a result, the grinding wheel shaft is rotatably fitted and held, so that no skill is required for chamfering the corner of the peripheral edge of the lens to be processed.

According to a second aspect of the present invention, a pair of chamfering means including the grinding wheel shaft, the chamfering whetstone, the urging means and the collar are provided in close proximity to each other, and the collars of the pair of chamfering means are positioned laterally to each other. The beveled slopes are arranged on the sides corresponding to each other, so that skill is not required for chamfering the corners of the peripheral edge of the lens to be processed, and the chamfering operation time is reduced. Can be shortened.

[Brief description of the drawings]

FIG. 1 is a perspective view of a balling machine provided with a spectacle lens peripheral edge chamfering device according to the present invention. FIG. 2 is a plan view of a main part of FIG. FIG. 3 is an explanatory view of the spectacle lens peripheral edge chamfering device shown in FIG. 4 (a) and 4 (b) are operation explanatory views of a cross section taken along line IV-IV in FIG. 5 (a) and 5 (b) are operation explanatory views of a cross section taken along line VV in FIG. FIG. 6 is a perspective view of a main part showing a second embodiment of the present invention. FIG. 7 is an explanatory view of the apparatus of FIG. 6 as viewed from below. FIG. 8 is an explanatory diagram showing the relationship between a conventional spectacle lens peripheral edge chamfering device and a ball mill. FIG. 9 is an explanatory view of a principal part showing a relationship between the lens to be processed and the chamfering grindstone in FIG. 14 Ball mill 15 Chamfering device 18 Carriage 23, 24 Lens shaft 29 Side plate (locking frame) 30, 31, 32 Connection shaft (locking frame) 41, 42 … Motors (rotary driving means) 41a, 42a …… Output shafts (grindstone shafts) 44,44 ′… Colors 47,47 ′ …… Chamfered grindstones 47a, 47a ′ …… Chamfer slopes 48,48 ′… Thrust cushion (biasing means) 57,57 '... Motor (rotary driving means) 57a, 57a' ... Output shaft (grindstone shaft) 58,58 '... Color 59,59' ... Chamfering grindstone 59a, 59a ′… Slope for chamfer 60… Spring (biasing means)

Claims (2)

(57) [Claims] 1. A frame which is removably mounted on a carriage of a ball mill, wherein a grindstone shaft driven by driving means and disposed in parallel with a lens axis of the carriage is provided in an axial direction and with respect to the lens axis. The frame is held so that it can move forward and backward in the direction intersecting, and a chamfering grindstone provided with a tapered chamfered slope on one side peripheral portion is fixed to the grindstone shaft, and the grindstone shaft is chamfered slope. It is urged by urging means in a forward direction, and the lens receiving collar disposed on the beveled slope side is rotatably fitted and held on the grindstone shaft adjacent to the chamfered grindstone. A spectacle lens peripheral edge chamfering device. 2. A pair of chamfering means including a grinding wheel shaft, a chamfering whetstone, a biasing means, and a collar are provided in close proximity to each other, and the collars of the pair of chamfering means are positioned laterally to each other. 2. The spectacle lens peripheral edge chamfering device according to claim 1, wherein the directions of the chamfering slopes are provided on mutually corresponding sides.